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Posted to commits@lucene.apache.org by ab...@apache.org on 2020/07/14 13:01:45 UTC

[lucene-solr] branch master updated: SOLR-14244: Remove ReplicaInfo.

This is an automated email from the ASF dual-hosted git repository.

ab pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/lucene-solr.git


The following commit(s) were added to refs/heads/master by this push:
     new a0488c1  SOLR-14244: Remove ReplicaInfo.
a0488c1 is described below

commit a0488c1cf1be4f02f3b7b4494444345f506ace64
Author: Andrzej Bialecki <ab...@apache.org>
AuthorDate: Tue Jul 14 15:01:23 2020 +0200

    SOLR-14244: Remove ReplicaInfo.
---
 solr/CHANGES.txt                                   |   4 +-
 .../solr/cloud/api/collections/SplitShardCmd.java  |  11 +-
 .../solr/cloud/autoscaling/IndexSizeTrigger.java   |  89 ++++----
 .../solr/cloud/autoscaling/SearchRateTrigger.java  |  55 +++--
 .../cloud/autoscaling/sim/SimCloudManager.java     |   7 +-
 .../autoscaling/sim/SimClusterStateProvider.java   | 224 +++++++++++----------
 .../autoscaling/sim/SimNodeStateProvider.java      |  22 +-
 .../solr/cloud/autoscaling/sim/SimScenario.java    |   8 +-
 .../solr/cloud/autoscaling/sim/SimUtils.java       |  25 ++-
 .../autoscaling/sim/SnapshotCloudManager.java      |   4 +-
 .../autoscaling/sim/SnapshotNodeStateProvider.java |  66 +++---
 .../apache/solr/cloud/overseer/NodeMutator.java    |   4 +-
 .../apache/solr/cloud/overseer/ReplicaMutator.java |   4 +-
 .../solr/handler/admin/MetricsHistoryHandler.java  |   5 +-
 .../src/java/org/apache/solr/util/SolrCLI.java     |   7 +-
 .../DistribDocExpirationUpdateProcessorTest.java   |   4 +-
 .../org/apache/solr/cloud/HttpPartitionTest.java   |   2 +-
 .../cloud/autoscaling/ComputePlanActionTest.java   |   3 +-
 .../SearchRateTriggerIntegrationTest.java          |   7 +-
 .../cloud/autoscaling/SearchRateTriggerTest.java   |  14 +-
 .../solr/cloud/autoscaling/TestPolicyCloud.java    |   9 +-
 .../autoscaling/sim/SimSolrCloudTestCase.java      |   9 +-
 .../sim/TestSimClusterStateProvider.java           |   3 +-
 .../cloud/autoscaling/sim/TestSimPolicyCloud.java  |   5 +-
 .../autoscaling/sim/TestSimTriggerIntegration.java |   8 +-
 .../autoscaling/sim/TestSnapshotCloudManager.java  |  19 +-
 .../org/apache/solr/cloud/rule/RuleEngineTest.java |   4 +-
 .../test/org/apache/solr/core/CoreSorterTest.java  |   2 +-
 .../solr/client/solrj/cloud/NodeStateProvider.java |   5 +-
 .../client/solrj/cloud/autoscaling/Clause.java     |   2 +-
 .../solrj/cloud/autoscaling/CoresVariable.java     |   6 +-
 .../autoscaling/DelegatingNodeStateProvider.java   |   3 +-
 .../solrj/cloud/autoscaling/FreeDiskVariable.java  |  31 +--
 .../cloud/autoscaling/MoveReplicaSuggester.java    |  13 +-
 .../solrj/cloud/autoscaling/PolicyHelper.java      |   6 +-
 .../solrj/cloud/autoscaling/ReplicaCount.java      |   6 +-
 .../solrj/cloud/autoscaling/ReplicaInfo.java       | 224 ---------------------
 .../solr/client/solrj/cloud/autoscaling/Row.java   |  47 +++--
 .../client/solrj/cloud/autoscaling/Suggester.java  |  14 +-
 .../client/solrj/cloud/autoscaling/Suggestion.java |   2 +-
 .../client/solrj/cloud/autoscaling/Variable.java   |   9 +-
 .../client/solrj/cloud/autoscaling/Violation.java  |   5 +-
 .../cloud/autoscaling/WithCollectionVariable.java  |   6 +-
 .../solrj/impl/SolrClientNodeStateProvider.java    |  30 +--
 .../java/org/apache/solr/common/cloud/Replica.java | 189 ++++++++++++++---
 .../autoscaling/MoveReplicaSuggesterTest.java      |  32 +--
 .../client/solrj/cloud/autoscaling/TestPolicy.java |  98 ++++-----
 .../solrj/cloud/autoscaling/TestPolicy2.java       |  19 +-
 48 files changed, 642 insertions(+), 729 deletions(-)

diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index e795b65..8e2c60a 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -93,7 +93,9 @@ Other Changes
 * LUCENE-9411: Fail complation on warnings, 9x gradle-only (Erick Erickson, Dawid Weiss)
   Deserves mention here as well as Lucene CHANGES.txt since it affects both.
 
-* SOLR-12847: Remove support for maxShardsPerNode.
+* SOLR-12847: Remove support for maxShardsPerNode. (ab)
+
+* SOLR-14244: Remove ReplicaInfo. (ab)
 
 Bug Fixes
 ---------------------
diff --git a/solr/core/src/java/org/apache/solr/cloud/api/collections/SplitShardCmd.java b/solr/core/src/java/org/apache/solr/cloud/api/collections/SplitShardCmd.java
index 3c1480f..0df9d09 100644
--- a/solr/core/src/java/org/apache/solr/cloud/api/collections/SplitShardCmd.java
+++ b/solr/core/src/java/org/apache/solr/cloud/api/collections/SplitShardCmd.java
@@ -35,7 +35,6 @@ import org.apache.solr.client.solrj.cloud.DistribStateManager;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.PolicyHelper;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable.Type;
 import org.apache.solr.client.solrj.cloud.autoscaling.VersionedData;
 import org.apache.solr.client.solrj.request.CoreAdminRequest;
@@ -638,17 +637,17 @@ public class SplitShardCmd implements OverseerCollectionMessageHandler.Cmd {
     NodeStateProvider nodeStateProvider = cloudManager.getNodeStateProvider();
     Map<String, Object> nodeValues = nodeStateProvider.getNodeValues(parentShardLeader.getNodeName(),
         Collections.singletonList(ImplicitSnitch.DISK));
-    Map<String, Map<String, List<ReplicaInfo>>> infos = nodeStateProvider.getReplicaInfo(parentShardLeader.getNodeName(),
+    Map<String, Map<String, List<Replica>>> infos = nodeStateProvider.getReplicaInfo(parentShardLeader.getNodeName(),
         Collections.singletonList(Type.CORE_IDX.metricsAttribute));
     if (infos.get(collection) == null || infos.get(collection).get(shard) == null) {
       throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "missing replica information for parent shard leader");
     }
     // find the leader
-    List<ReplicaInfo> lst = infos.get(collection).get(shard);
+    List<Replica> lst = infos.get(collection).get(shard);
     Double indexSize = null;
-    for (ReplicaInfo info : lst) {
-      if (info.getCore().equals(parentShardLeader.getCoreName())) {
-        Number size = (Number)info.getVariable(Type.CORE_IDX.metricsAttribute);
+    for (Replica info : lst) {
+      if (info.getCoreName().equals(parentShardLeader.getCoreName())) {
+        Number size = (Number)info.get(Type.CORE_IDX.metricsAttribute);
         if (size == null) {
           throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "missing index size information for parent shard leader");
         }
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/IndexSizeTrigger.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/IndexSizeTrigger.java
index da40366..e987828 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/IndexSizeTrigger.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/IndexSizeTrigger.java
@@ -33,7 +33,6 @@ import java.util.concurrent.atomic.AtomicLong;
 import java.util.Locale;
 
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventType;
 import org.apache.solr.common.SolrException;
@@ -263,14 +262,14 @@ public class IndexSizeTrigger extends TriggerBase {
     }
 
     // replica name / info + size, retrieved from leaders only
-    Map<String, ReplicaInfo> currentSizes = new HashMap<>();
+    Map<String, Replica> currentSizes = new HashMap<>();
 
     try {
       ClusterState clusterState = cloudManager.getClusterStateProvider().getClusterState();
       for (String node : clusterState.getLiveNodes()) {
-        Map<String, ReplicaInfo> metricTags = new HashMap<>();
+        Map<String, Replica> metricTags = new HashMap<>();
         // coll, shard, replica
-        Map<String, Map<String, List<ReplicaInfo>>> infos = cloudManager.getNodeStateProvider().getReplicaInfo(node, Collections.emptyList());
+        Map<String, Map<String, List<Replica>>> infos = cloudManager.getNodeStateProvider().getReplicaInfo(node, Collections.emptyList());
         infos.forEach((coll, shards) -> {
           if (!collections.isEmpty() && !collections.contains(coll)) {
             return;
@@ -293,9 +292,9 @@ public class IndexSizeTrigger extends TriggerBase {
               return;
             }
             // find ReplicaInfo
-            ReplicaInfo info = null;
-            for (ReplicaInfo ri : replicas) {
-              if (r.getCoreName().equals(ri.getCore())) {
+            Replica info = null;
+            for (Replica ri : replicas) {
+              if (r.getCoreName().equals(ri.getCoreName())) {
                 info = ri;
                 break;
               }
@@ -305,7 +304,7 @@ public class IndexSizeTrigger extends TriggerBase {
               return;
             }
             // we have to translate to the metrics registry name, which uses "_replica_nN" as suffix
-            String replicaName = Utils.parseMetricsReplicaName(coll, info.getCore());
+            String replicaName = Utils.parseMetricsReplicaName(coll, info.getCoreName());
             if (replicaName == null) { // should never happen???
               replicaName = info.getName(); // which is actually coreNode name...
             }
@@ -325,7 +324,7 @@ public class IndexSizeTrigger extends TriggerBase {
         }
         Map<String, Object> sizes = cloudManager.getNodeStateProvider().getNodeValues(node, metricTags.keySet());
         sizes.forEach((tag, size) -> {
-          final ReplicaInfo info = metricTags.get(tag);
+          final Replica info = metricTags.get(tag);
           if (info == null) {
             log.warn("Missing replica info for response tag {}", tag);
           } else {
@@ -335,15 +334,15 @@ public class IndexSizeTrigger extends TriggerBase {
               return;
             }
 
-            ReplicaInfo currentInfo = currentSizes.computeIfAbsent(info.getCore(), k -> (ReplicaInfo)info.clone());
+            Replica currentInfo = currentSizes.computeIfAbsent(info.getCoreName(), k -> (Replica) info.clone());
             if (tag.contains("INDEX")) {
-              currentInfo.getVariables().put(TOTAL_BYTES_SIZE_KEY, ((Number) size).longValue());
+              currentInfo.getProperties().put(TOTAL_BYTES_SIZE_KEY, ((Number) size).longValue());
             } else if (tag.endsWith("SEARCHER.searcher.numDocs")) {
-              currentInfo.getVariables().put(DOCS_SIZE_KEY, ((Number) size).longValue());
+              currentInfo.getProperties().put(DOCS_SIZE_KEY, ((Number) size).longValue());
             } else if (tag.endsWith("SEARCHER.searcher.maxDoc")) {
-              currentInfo.getVariables().put(MAX_DOC_KEY, ((Number) size).longValue());
+              currentInfo.getProperties().put(MAX_DOC_KEY, ((Number) size).longValue());
             } else if (tag.endsWith("SEARCHER.searcher.indexCommitSize")) {
-              currentInfo.getVariables().put(COMMIT_SIZE_KEY, ((Number) size).longValue());
+              currentInfo.getProperties().put(COMMIT_SIZE_KEY, ((Number) size).longValue());
             }
           }
         });
@@ -358,31 +357,31 @@ public class IndexSizeTrigger extends TriggerBase {
     // now check thresholds
 
     // collection / list(info)
-    Map<String, List<ReplicaInfo>> aboveSize = new HashMap<>();
+    Map<String, List<Replica>> aboveSize = new HashMap<>();
 
     Set<String> splittable = new HashSet<>();
 
     currentSizes.forEach((coreName, info) -> {
       // calculate estimated bytes
-      long maxDoc = (Long)info.getVariable(MAX_DOC_KEY);
-      long numDocs = (Long)info.getVariable(DOCS_SIZE_KEY);
-      long commitSize = (Long)info.getVariable(COMMIT_SIZE_KEY, 0L);
+      long maxDoc = (Long)info.get(MAX_DOC_KEY);
+      long numDocs = (Long)info.get(DOCS_SIZE_KEY);
+      long commitSize = (Long)info.get(COMMIT_SIZE_KEY, 0L);
       if (commitSize <= 0) {
-        commitSize = (Long)info.getVariable(TOTAL_BYTES_SIZE_KEY);
+        commitSize = (Long)info.get(TOTAL_BYTES_SIZE_KEY);
       }
       // calculate estimated size as a side-effect
       commitSize = estimatedSize(maxDoc, numDocs, commitSize);
-      info.getVariables().put(BYTES_SIZE_KEY, commitSize);
+      info.getProperties().put(BYTES_SIZE_KEY, commitSize);
 
-      if ((Long)info.getVariable(BYTES_SIZE_KEY) > aboveBytes ||
-          (Long)info.getVariable(DOCS_SIZE_KEY) > aboveDocs) {
+      if ((Long)info.get(BYTES_SIZE_KEY) > aboveBytes ||
+          (Long)info.get(DOCS_SIZE_KEY) > aboveDocs) {
         if (waitForElapsed(coreName, now, lastAboveEventMap)) {
-          List<ReplicaInfo> infos = aboveSize.computeIfAbsent(info.getCollection(), c -> new ArrayList<>());
+          List<Replica> infos = aboveSize.computeIfAbsent(info.getCollection(), c -> new ArrayList<>());
           if (!infos.contains(info)) {
-            if ((Long)info.getVariable(BYTES_SIZE_KEY) > aboveBytes) {
-              info.getVariables().put(VIOLATION_KEY, ABOVE_BYTES_PROP);
+            if ((Long)info.get(BYTES_SIZE_KEY) > aboveBytes) {
+              info.getProperties().put(VIOLATION_KEY, ABOVE_BYTES_PROP);
             } else {
-              info.getVariables().put(VIOLATION_KEY, ABOVE_DOCS_PROP);
+              info.getProperties().put(VIOLATION_KEY, ABOVE_DOCS_PROP);
             }
             infos.add(info);
             splittable.add(info.getName());
@@ -395,20 +394,20 @@ public class IndexSizeTrigger extends TriggerBase {
     });
 
     // collection / list(info)
-    Map<String, List<ReplicaInfo>> belowSize = new HashMap<>();
+    Map<String, List<Replica>> belowSize = new HashMap<>();
 
     currentSizes.forEach((coreName, info) -> {
-      if (((Long)info.getVariable(BYTES_SIZE_KEY) < belowBytes ||
-          (Long)info.getVariable(DOCS_SIZE_KEY) < belowDocs) &&
+      if (((Long)info.get(BYTES_SIZE_KEY) < belowBytes ||
+          (Long)info.get(DOCS_SIZE_KEY) < belowDocs) &&
           // make sure we don't produce conflicting ops
           !splittable.contains(info.getName())) {
         if (waitForElapsed(coreName, now, lastBelowEventMap)) {
-          List<ReplicaInfo> infos = belowSize.computeIfAbsent(info.getCollection(), c -> new ArrayList<>());
+          List<Replica> infos = belowSize.computeIfAbsent(info.getCollection(), c -> new ArrayList<>());
           if (!infos.contains(info)) {
-            if ((Long)info.getVariable(BYTES_SIZE_KEY) < belowBytes) {
-              info.getVariables().put(VIOLATION_KEY, BELOW_BYTES_PROP);
+            if ((Long)info.get(BYTES_SIZE_KEY) < belowBytes) {
+              info.getProperties().put(VIOLATION_KEY, BELOW_BYTES_PROP);
             } else {
-              info.getVariables().put(VIOLATION_KEY, BELOW_DOCS_PROP);
+              info.getProperties().put(VIOLATION_KEY, BELOW_DOCS_PROP);
             }
             infos.add(info);
           }
@@ -435,7 +434,7 @@ public class IndexSizeTrigger extends TriggerBase {
       // sort by decreasing size to first split the largest ones
       // XXX see the comment below about using DOCS_SIZE_PROP in lieu of BYTES_SIZE_PROP
       replicas.sort((r1, r2) -> {
-        long delta = (Long) r1.getVariable(DOCS_SIZE_KEY) - (Long) r2.getVariable(DOCS_SIZE_KEY);
+        long delta = (Long) r1.get(DOCS_SIZE_KEY) - (Long) r2.get(DOCS_SIZE_KEY);
         if (delta > 0) {
           return -1;
         } else if (delta < 0) {
@@ -458,7 +457,7 @@ public class IndexSizeTrigger extends TriggerBase {
         params.put(SPLIT_BY_PREFIX, splitByPrefix);
         op.addHint(Suggester.Hint.PARAMS, params);
         ops.add(op);
-        Long time = lastAboveEventMap.get(r.getCore());
+        Long time = lastAboveEventMap.get(r.getCoreName());
         if (time != null && eventTime.get() > time) {
           eventTime.set(time);
         }
@@ -477,7 +476,7 @@ public class IndexSizeTrigger extends TriggerBase {
         // then we should be sorting by BYTES_SIZE_PROP. However, since DOCS and BYTES are
         // loosely correlated it's simpler to sort just by docs (which better reflects the "too small"
         // condition than index size, due to possibly existing deleted docs that still occupy space)
-        long delta = (Long) r1.getVariable(DOCS_SIZE_KEY) - (Long) r2.getVariable(DOCS_SIZE_KEY);
+        long delta = (Long) r1.get(DOCS_SIZE_KEY) - (Long) r2.get(DOCS_SIZE_KEY);
         if (delta > 0) {
           return 1;
         } else if (delta < 0) {
@@ -495,11 +494,11 @@ public class IndexSizeTrigger extends TriggerBase {
       op.addHint(Suggester.Hint.COLL_SHARD, new Pair(coll, replicas.get(0).getShard()));
       op.addHint(Suggester.Hint.COLL_SHARD, new Pair(coll, replicas.get(1).getShard()));
       ops.add(op);
-      Long time = lastBelowEventMap.get(replicas.get(0).getCore());
+      Long time = lastBelowEventMap.get(replicas.get(0).getCoreName());
       if (time != null && eventTime.get() > time) {
         eventTime.set(time);
       }
-      time = lastBelowEventMap.get(replicas.get(1).getCore());
+      time = lastBelowEventMap.get(replicas.get(1).getCoreName());
       if (time != null && eventTime.get() > time) {
         eventTime.set(time);
       }
@@ -511,14 +510,14 @@ public class IndexSizeTrigger extends TriggerBase {
     if (processor.process(new IndexSizeEvent(getName(), eventTime.get(), ops, aboveSize, belowSize))) {
       // update last event times
       aboveSize.forEach((coll, replicas) -> {
-        replicas.forEach(r -> lastAboveEventMap.put(r.getCore(), now));
+        replicas.forEach(r -> lastAboveEventMap.put(r.getCoreName(), now));
       });
       belowSize.forEach((coll, replicas) -> {
         if (replicas.size() < 2) {
           return;
         }
-        lastBelowEventMap.put(replicas.get(0).getCore(), now);
-        lastBelowEventMap.put(replicas.get(1).getCore(), now);
+        lastBelowEventMap.put(replicas.get(0).getCoreName(), now);
+        lastBelowEventMap.put(replicas.get(1).getCoreName(), now);
       });
     }
   }
@@ -544,18 +543,18 @@ public class IndexSizeTrigger extends TriggerBase {
   }
 
   public static class IndexSizeEvent extends TriggerEvent {
-    public IndexSizeEvent(String source, long eventTime, List<Op> ops, Map<String, List<ReplicaInfo>> aboveSize,
-                          Map<String, List<ReplicaInfo>> belowSize) {
+    public IndexSizeEvent(String source, long eventTime, List<Op> ops, Map<String, List<Replica>> aboveSize,
+                          Map<String, List<Replica>> belowSize) {
       super(TriggerEventType.INDEXSIZE, source, eventTime, null);
       properties.put(TriggerEvent.REQUESTED_OPS, ops);
       // avoid passing very large amounts of data here - just use replica names
       TreeMap<String, String> above = new TreeMap<>();
       aboveSize.forEach((coll, replicas) ->
-          replicas.forEach(r -> above.put(r.getCore(), "docs=" + r.getVariable(DOCS_SIZE_KEY) + ", bytes=" + r.getVariable(BYTES_SIZE_KEY))));
+          replicas.forEach(r -> above.put(r.getCoreName(), "docs=" + r.get(DOCS_SIZE_KEY) + ", bytes=" + r.get(BYTES_SIZE_KEY))));
       properties.put(ABOVE_SIZE_KEY, above);
       TreeMap<String, String> below = new TreeMap<>();
       belowSize.forEach((coll, replicas) ->
-          replicas.forEach(r -> below.put(r.getCore(), "docs=" + r.getVariable(DOCS_SIZE_KEY) + ", bytes=" + r.getVariable(BYTES_SIZE_KEY))));
+          replicas.forEach(r -> below.put(r.getCoreName(), "docs=" + r.get(DOCS_SIZE_KEY) + ", bytes=" + r.get(BYTES_SIZE_KEY))));
       properties.put(BELOW_SIZE_KEY, below);
     }
   }
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/SearchRateTrigger.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/SearchRateTrigger.java
index efd5b24..505c511 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/SearchRateTrigger.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/SearchRateTrigger.java
@@ -33,7 +33,6 @@ import java.util.concurrent.atomic.AtomicLong;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.util.concurrent.AtomicDouble;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventType;
@@ -331,7 +330,7 @@ public class SearchRateTrigger extends TriggerBase {
     }
 
     // collection, shard, list(replica + rate)
-    Map<String, Map<String, List<ReplicaInfo>>> collectionRates = new HashMap<>();
+    Map<String, Map<String, List<Replica>>> collectionRates = new HashMap<>();
     // node, rate
     Map<String, AtomicDouble> nodeRates = new HashMap<>();
     // this replication factor only considers replica types that are searchable
@@ -346,9 +345,9 @@ public class SearchRateTrigger extends TriggerBase {
       return;
     }
     for (String node : cloudManager.getClusterStateProvider().getLiveNodes()) {
-      Map<String, ReplicaInfo> metricTags = new HashMap<>();
+      Map<String, Replica> metricTags = new HashMap<>();
       // coll, shard, replica
-      Map<String, Map<String, List<ReplicaInfo>>> infos = cloudManager.getNodeStateProvider().getReplicaInfo(node, Collections.emptyList());
+      Map<String, Map<String, List<Replica>>> infos = cloudManager.getNodeStateProvider().getReplicaInfo(node, Collections.emptyList());
       infos.forEach((coll, shards) -> {
         Map<String, AtomicInteger> replPerShard = searchableReplicationFactors.computeIfAbsent(coll, c -> new HashMap<>());
         shards.forEach((sh, replicas) -> {
@@ -360,7 +359,7 @@ public class SearchRateTrigger extends TriggerBase {
             }
             repl.incrementAndGet();
             // we have to translate to the metrics registry name, which uses "_replica_nN" as suffix
-            String replicaName = Utils.parseMetricsReplicaName(coll, replica.getCore());
+            String replicaName = Utils.parseMetricsReplicaName(coll, replica.getCoreName());
             if (replicaName == null) { // should never happen???
               replicaName = replica.getName(); // which is actually coreNode name...
             }
@@ -379,14 +378,14 @@ public class SearchRateTrigger extends TriggerBase {
         rates.forEach((tag, rate) -> log.debug("###  " + tag + "\t" + rate)); // logOk
       }
       rates.forEach((tag, rate) -> {
-        ReplicaInfo info = metricTags.get(tag);
+        Replica info = metricTags.get(tag);
         if (info == null) {
           log.warn("Missing replica info for response tag {}", tag);
         } else {
-          Map<String, List<ReplicaInfo>> perCollection = collectionRates.computeIfAbsent(info.getCollection(), s -> new HashMap<>());
-          List<ReplicaInfo> perShard = perCollection.computeIfAbsent(info.getShard(), s -> new ArrayList<>());
-          info = (ReplicaInfo)info.clone();
-          info.getVariables().put(AutoScalingParams.RATE, ((Number)rate).doubleValue());
+          Map<String, List<Replica>> perCollection = collectionRates.computeIfAbsent(info.getCollection(), s -> new HashMap<>());
+          List<Replica> perShard = perCollection.computeIfAbsent(info.getShard(), s -> new ArrayList<>());
+          info = (Replica)info.clone();
+          info.getProperties().put(AutoScalingParams.RATE, ((Number)rate).doubleValue());
           perShard.add(info);
           AtomicDouble perNode = nodeRates.computeIfAbsent(node, s -> new AtomicDouble());
           perNode.addAndGet(((Number)rate).doubleValue());
@@ -399,7 +398,7 @@ public class SearchRateTrigger extends TriggerBase {
         log.debug("## Collection: {}", coll);
         collRates.forEach((s, replicas) -> {
           log.debug("##  - {}", s);
-          replicas.forEach(ri -> log.debug("##     {}  {}", ri.getCore(), ri.getVariable(AutoScalingParams.RATE))); //logOk
+          replicas.forEach(ri -> log.debug("##     {}  {}", ri.getCoreName(), ri.get(AutoScalingParams.RATE))); //logOk
         });
       });
     }
@@ -428,18 +427,18 @@ public class SearchRateTrigger extends TriggerBase {
 
     Map<String, Map<String, Double>> hotShards = new HashMap<>();
     Map<String, Map<String, Double>> coldShards = new HashMap<>();
-    List<ReplicaInfo> hotReplicas = new ArrayList<>();
-    List<ReplicaInfo> coldReplicas = new ArrayList<>();
+    List<Replica> hotReplicas = new ArrayList<>();
+    List<Replica> coldReplicas = new ArrayList<>();
     collectionRates.forEach((coll, shardRates) -> {
       shardRates.forEach((sh, replicaRates) -> {
         double totalShardRate = replicaRates.stream()
             .map(r -> {
-              String elapsedKey = r.getCollection() + "." + r.getCore();
-              if ((Double)r.getVariable(AutoScalingParams.RATE) > aboveRate) {
+              String elapsedKey = r.getCollection() + "." + r.getCoreName();
+              if ((Double)r.get(AutoScalingParams.RATE) > aboveRate) {
                 if (waitForElapsed(elapsedKey, now, lastReplicaEvent)) {
                   hotReplicas.add(r);
                 }
-              } else if ((Double)r.getVariable(AutoScalingParams.RATE) < belowRate) {
+              } else if ((Double)r.get(AutoScalingParams.RATE) < belowRate) {
                 if (waitForElapsed(elapsedKey, now, lastReplicaEvent)) {
                   coldReplicas.add(r);
                 }
@@ -449,7 +448,7 @@ public class SearchRateTrigger extends TriggerBase {
               }
               return r;
             })
-            .mapToDouble(r -> (Double)r.getVariable(AutoScalingParams.RATE)).sum();
+            .mapToDouble(r -> (Double)r.get(AutoScalingParams.RATE)).sum();
         // calculate average shard rate over all searchable replicas (see SOLR-12470)
         double shardRate = totalShardRate / searchableReplicationFactors.get(coll).get(sh).doubleValue();
         String elapsedKey = coll + "." + sh;
@@ -486,7 +485,7 @@ public class SearchRateTrigger extends TriggerBase {
     collectionRates.forEach((coll, shardRates) -> {
       double total = shardRates.entrySet().stream()
           .mapToDouble(e -> e.getValue().stream()
-              .mapToDouble(r -> (Double)r.getVariable(AutoScalingParams.RATE)).sum()).sum();
+              .mapToDouble(r -> (Double)r.get(AutoScalingParams.RATE)).sum()).sum();
       if (collections.isEmpty() || collections.contains(coll)) {
         if (total > aboveRate) {
           if (waitForElapsed(coll, now, lastCollectionEvent)) {
@@ -547,13 +546,13 @@ public class SearchRateTrigger extends TriggerBase {
       });
     });
     hotReplicas.forEach(r -> {
-      long time = lastReplicaEvent.get(r.getCollection() + "." + r.getCore());
+      long time = lastReplicaEvent.get(r.getCollection() + "." + r.getCoreName());
       if (eventTime.get() > time) {
         eventTime.set(time);
       }
     });
     coldReplicas.forEach(r -> {
-      long time = lastReplicaEvent.get(r.getCollection() + "." + r.getCore());
+      long time = lastReplicaEvent.get(r.getCollection() + "." + r.getCoreName());
       if (eventTime.get() > time) {
         eventTime.set(time);
       }
@@ -593,8 +592,8 @@ public class SearchRateTrigger extends TriggerBase {
           .forEach((sh, rate) -> lastShardEvent.put(e.getKey() + "." + sh, now)));
       coldShards.entrySet().forEach(e -> e.getValue()
           .forEach((sh, rate) -> lastShardEvent.put(e.getKey() + "." + sh, now)));
-      hotReplicas.forEach(r -> lastReplicaEvent.put(r.getCollection() + "." + r.getCore(), now));
-      coldReplicas.forEach(r -> lastReplicaEvent.put(r.getCollection() + "." + r.getCore(), now));
+      hotReplicas.forEach(r -> lastReplicaEvent.put(r.getCollection() + "." + r.getCoreName(), now));
+      coldReplicas.forEach(r -> lastReplicaEvent.put(r.getCollection() + "." + r.getCoreName(), now));
     }
   }
 
@@ -604,7 +603,7 @@ public class SearchRateTrigger extends TriggerBase {
                                Map<String, Double> hotNodes,
                                Map<String, Double> hotCollections,
                                Map<String, Map<String, Double>> hotShards,
-                               List<ReplicaInfo> hotReplicas) {
+                               List<Replica> hotReplicas) {
     // calculate the number of replicas to add to each hot shard, based on how much the rate was
     // exceeded - but within limits.
 
@@ -678,7 +677,7 @@ public class SearchRateTrigger extends TriggerBase {
                                 Map<String, Double> coldNodes,
                                 Map<String, Double> coldCollections,
                                 Map<String, Map<String, Double>> coldShards,
-                                List<ReplicaInfo> coldReplicas) {
+                                List<Replica> coldReplicas) {
     // COLD COLLECTIONS
     // Probably can't do anything reasonable about whole cold collections
     // because they may be needed even if not used.
@@ -694,7 +693,7 @@ public class SearchRateTrigger extends TriggerBase {
     // replicas still available (additional non-searchable replicas may exist, too)
     // NOTE: do this before adding ops for DELETENODE because we don't want to attempt
     // deleting replicas that have been already moved elsewhere
-    Map<String, Map<String, List<ReplicaInfo>>> byCollectionByShard = new HashMap<>();
+    Map<String, Map<String, List<Replica>>> byCollectionByShard = new HashMap<>();
     coldReplicas.forEach(ri -> {
       byCollectionByShard.computeIfAbsent(ri.getCollection(), c -> new HashMap<>())
           .computeIfAbsent(ri.getShard(), s -> new ArrayList<>())
@@ -702,7 +701,7 @@ public class SearchRateTrigger extends TriggerBase {
     });
     coldShards.forEach((coll, perShard) -> {
       perShard.forEach((shard, rate) -> {
-        List<ReplicaInfo> replicas = byCollectionByShard
+        List<Replica> replicas = byCollectionByShard
             .getOrDefault(coll, Collections.emptyMap())
             .getOrDefault(shard, Collections.emptyList());
         if (replicas.isEmpty()) {
@@ -784,11 +783,11 @@ public class SearchRateTrigger extends TriggerBase {
                            Map<String, Double> hotNodes,
                            Map<String, Double> hotCollections,
                            Map<String, Map<String, Double>> hotShards,
-                           List<ReplicaInfo> hotReplicas,
+                           List<Replica> hotReplicas,
                            Map<String, Double> coldNodes,
                            Map<String, Double> coldCollections,
                            Map<String, Map<String, Double>> coldShards,
-                           List<ReplicaInfo> coldReplicas,
+                           List<Replica> coldReplicas,
                            Set<String> violations) {
       super(TriggerEventType.SEARCHRATE, source, eventTime, null);
       properties.put(TriggerEvent.REQUESTED_OPS, ops);
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimCloudManager.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimCloudManager.java
index 25624f4..b8ac313 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimCloudManager.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimCloudManager.java
@@ -53,7 +53,6 @@ import org.apache.solr.client.solrj.cloud.DistributedQueueFactory;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
 import org.apache.solr.client.solrj.impl.ClusterStateProvider;
 import org.apache.solr.client.solrj.request.AbstractUpdateRequest;
@@ -320,7 +319,7 @@ public class SimCloudManager implements SolrCloudManager {
     for (String node : other.getClusterStateProvider().getLiveNodes()) {
       SimClusterStateProvider simClusterStateProvider = cloudManager.getSimClusterStateProvider();
       cloudManager.getSimNodeStateProvider().simSetNodeValues(node, other.getNodeStateProvider().getNodeValues(node, nodeTags));
-      Map<String, Map<String, List<ReplicaInfo>>> infos = other.getNodeStateProvider().getReplicaInfo(node, replicaTags);
+      Map<String, Map<String, List<Replica>>> infos = other.getNodeStateProvider().getReplicaInfo(node, replicaTags);
       simClusterStateProvider.simSetReplicaValues(node, infos, true);
     }
     SimUtils.checkConsistency(cloudManager, config);
@@ -397,7 +396,7 @@ public class SimCloudManager implements SolrCloudManager {
     Map<String, Map<Replica.State, AtomicInteger>> replicaStates = new TreeMap<>();
     int numReplicas = 0;
     for (String node : getLiveNodesSet().get()) {
-      List<ReplicaInfo> replicas = getSimClusterStateProvider().simGetReplicaInfos(node);
+      List<Replica> replicas = getSimClusterStateProvider().simGetReplicaInfos(node);
       numReplicas += replicas.size();
       if (replicas.size() > maxReplicas) {
         maxReplicas = replicas.size();
@@ -405,7 +404,7 @@ public class SimCloudManager implements SolrCloudManager {
       if (minReplicas > replicas.size()) {
         minReplicas = replicas.size();
       }
-      for (ReplicaInfo ri : replicas) {
+      for (Replica ri : replicas) {
         replicaStates.computeIfAbsent(ri.getCollection(), c -> new TreeMap<>())
             .computeIfAbsent(ri.getState(), s -> new AtomicInteger())
             .incrementAndGet();
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimClusterStateProvider.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimClusterStateProvider.java
index 46f1beb..19866d6 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimClusterStateProvider.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimClusterStateProvider.java
@@ -53,7 +53,6 @@ import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.BadVersionException;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
 import org.apache.solr.client.solrj.cloud.autoscaling.PolicyHelper;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventType;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable.Type;
@@ -139,8 +138,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
   private final SimDistribStateManager stateManager;
   private final SimCloudManager cloudManager;
 
-  private final Map<String, List<ReplicaInfo>> nodeReplicaMap = new ConcurrentHashMap<>();
-  private final Map<String, Map<String, List<ReplicaInfo>>> colShardReplicaMap = new ConcurrentHashMap<>();
+  private final Map<String, List<Replica>> nodeReplicaMap = new ConcurrentHashMap<>();
+  private final Map<String, Map<String, List<Replica>>> colShardReplicaMap = new ConcurrentHashMap<>();
   private final Map<String, Object> clusterProperties = new ConcurrentHashMap<>();
   private final Map<String, Map<String, Object>> collProperties = new ConcurrentHashMap<>();
   private final Map<String, Map<String, Map<String, Object>>> sliceProperties = new ConcurrentHashMap<>();
@@ -190,10 +189,10 @@ public class SimClusterStateProvider implements ClusterStateProvider {
                 }
                 Map<String, Object> props;
                 synchronized (ri) {
-                  props = new HashMap<>(ri.getVariables());
+                  props = new HashMap<>(ri.getProperties());
                 }
                 props.put(ZkStateReader.NODE_NAME_PROP, n);
-                props.put(ZkStateReader.CORE_NAME_PROP, ri.getCore());
+                props.put(ZkStateReader.CORE_NAME_PROP, ri.getCoreName());
                 props.put(ZkStateReader.REPLICA_TYPE, ri.getType().toString());
                 props.put(ZkStateReader.STATE_PROP, ri.getState().toString());
                 Replica r = new Replica(ri.getName(), props, ri.getCollection(), ri.getShard());
@@ -360,9 +359,10 @@ public class SimClusterStateProvider implements ClusterStateProvider {
             if (leader != null && r.getName().equals(leader.getName())) {
               props.put("leader", "true");
             }
-            ReplicaInfo ri = new ReplicaInfo(r.getName(), r.getCoreName(), dc.getName(), s.getName(), r.getType(), r.getNodeName(), props);
+            Replica ri = new Replica(r.getName(), r.getNodeName(), dc.getName(), s.getName(), r.getCoreName(),
+                r.getState(), r.getType(), props);
             if (leader != null && r.getName().equals(leader.getName())) {
-              ri.getVariables().put("leader", "true");
+              ri.getProperties().put("leader", "true");
             }
             if (liveNodes.get().contains(r.getNodeName())) {
               nodeReplicaMap.computeIfAbsent(r.getNodeName(), Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN).add(ri);
@@ -412,13 +412,13 @@ public class SimClusterStateProvider implements ClusterStateProvider {
     return nodes.get(random.nextInt(nodes.size()));
   }
 
-  private ReplicaInfo getReplicaInfo(Replica r) {
+  private Replica getReplicaInfo(Replica r) {
     @SuppressWarnings({"unchecked"})
-    final List<ReplicaInfo> list = nodeReplicaMap.computeIfAbsent
+    final List<Replica> list = nodeReplicaMap.computeIfAbsent
       (r.getNodeName(), Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN);
     synchronized (list) {
-      for (ReplicaInfo ri : list) {
-        if (r.getCoreName().equals(ri.getCore()) && r.getName().equals(ri.getName())) {
+      for (Replica ri : list) {
+        if (r.getCoreName().equals(ri.getCoreName()) && r.getName().equals(ri.getName())) {
           return ri;
         }
       }
@@ -529,12 +529,13 @@ public class SimClusterStateProvider implements ClusterStateProvider {
   // this method needs to be called under a lock
   private void setReplicaStates(String nodeId, Replica.State state, Set<String> changedCollections) {
     @SuppressWarnings({"unchecked"})
-    List<ReplicaInfo> replicas = nodeReplicaMap.computeIfAbsent(nodeId, Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN);
+    List<Replica> replicas = nodeReplicaMap.computeIfAbsent(nodeId, Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN);
     synchronized (replicas) {
       replicas.forEach(r -> {
-        r.getVariables().put(ZkStateReader.STATE_PROP, state.toString());
+        r.setState(state);
+        //r.getProperties().put(ZkStateReader.STATE_PROP, state.toString());
         if (state != Replica.State.ACTIVE) {
-          r.getVariables().remove(ZkStateReader.LEADER_PROP);
+          r.getProperties().remove(ZkStateReader.LEADER_PROP);
         }
         changedCollections.add(r.getCollection());
       });
@@ -628,16 +629,17 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       if (message.getStr(CoreAdminParams.CORE_NODE_NAME) == null) {
         createReplica.coreNodeName = Assign.assignCoreNodeName(stateManager, coll);
       }
-      ReplicaInfo ri = new ReplicaInfo(
+      Replica ri = new Replica(
           createReplica.coreNodeName,
-          createReplica.coreName,
+          createReplica.node,
           createReplica.collectionName,
           createReplica.sliceName,
+          createReplica.coreName,
+          Replica.State.DOWN,
           createReplica.replicaType,
-          createReplica.node,
           message.getProperties()
       );
-      simAddReplica(ri.getNode(), ri, true);
+      simAddReplica(ri.getNodeName(), ri, true);
     }
     if (sessionWrapper.get() != null) {
       sessionWrapper.get().release();
@@ -653,17 +655,17 @@ public class SimClusterStateProvider implements ClusterStateProvider {
    * @param runLeaderElection if true then run a leader election after adding the replica.
    */
   @SuppressWarnings({"unchecked"})
-  public void simAddReplica(String nodeId, ReplicaInfo replicaInfo, boolean runLeaderElection) throws Exception {
+  public void simAddReplica(String nodeId, Replica replicaInfo, boolean runLeaderElection) throws Exception {
     ensureNotClosed();
     lock.lockInterruptibly();
     try {
 
       // make sure SolrCore name is unique across cluster and coreNodeName within collection
-      for (Map.Entry<String, List<ReplicaInfo>> e : nodeReplicaMap.entrySet()) {
-        final List<ReplicaInfo> replicas = e.getValue();
+      for (Map.Entry<String, List<Replica>> e : nodeReplicaMap.entrySet()) {
+        final List<Replica> replicas = e.getValue();
         synchronized (replicas) {
-          for (ReplicaInfo ri : replicas) {
-            if (ri.getCore().equals(replicaInfo.getCore())) {
+          for (Replica ri : replicas) {
+            if (ri.getCoreName().equals(replicaInfo.getCoreName())) {
               throw new Exception("Duplicate SolrCore name for existing=" + ri + " on node " + e.getKey() + " and new=" + replicaInfo);
             }
             if (ri.getName().equals(replicaInfo.getName()) && ri.getCollection().equals(replicaInfo.getCollection())) {
@@ -676,29 +678,29 @@ public class SimClusterStateProvider implements ClusterStateProvider {
         throw new Exception("Target node " + nodeId + " is not live: " + liveNodes);
       }
       // verify info
-      if (replicaInfo.getCore() == null) {
+      if (replicaInfo.getCoreName() == null) {
         throw new Exception("Missing core: " + replicaInfo);
       }
       // XXX replica info is not supposed to have this as a variable
-      replicaInfo.getVariables().remove(ZkStateReader.SHARD_ID_PROP);
+      replicaInfo.getProperties().remove(ZkStateReader.SHARD_ID_PROP);
       if (replicaInfo.getName() == null) {
         throw new Exception("Missing name: " + replicaInfo);
       }
-      if (replicaInfo.getNode() == null) {
+      if (replicaInfo.getNodeName() == null) {
         throw new Exception("Missing node: " + replicaInfo);
       }
-      if (!replicaInfo.getNode().equals(nodeId)) {
+      if (!replicaInfo.getNodeName().equals(nodeId)) {
         throw new Exception("Wrong node (not " + nodeId + "): " + replicaInfo);
       }
       
       opDelay(replicaInfo.getCollection(), CollectionParams.CollectionAction.ADDREPLICA.name());
 
       // mark replica as active
-      replicaInfo.getVariables().put(ZkStateReader.STATE_PROP, Replica.State.ACTIVE.toString());
+      replicaInfo.setState(Replica.State.ACTIVE);
       // add a property expected in Policy calculations, if missing
-      if (replicaInfo.getVariable(Type.CORE_IDX.metricsAttribute) == null) {
-        replicaInfo.getVariables().put(Type.CORE_IDX.metricsAttribute, new AtomicLong(SimCloudManager.DEFAULT_IDX_SIZE_BYTES));
-        replicaInfo.getVariables().put(Variable.coreidxsize,
+      if (replicaInfo.get(Type.CORE_IDX.metricsAttribute) == null) {
+        replicaInfo.getProperties().put(Type.CORE_IDX.metricsAttribute, new AtomicLong(SimCloudManager.DEFAULT_IDX_SIZE_BYTES));
+        replicaInfo.getProperties().put(Variable.coreidxsize,
             new AtomicDouble((Double)Type.CORE_IDX.convertVal(SimCloudManager.DEFAULT_IDX_SIZE_BYTES)));
       }
       nodeReplicaMap.computeIfAbsent(nodeId, Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN).add(replicaInfo);
@@ -719,13 +721,13 @@ public class SimClusterStateProvider implements ClusterStateProvider {
         throw new Exception("Missing '" + ImplicitSnitch.DISK + "' in node metrics for node " + nodeId);
         //disk = SimCloudManager.DEFAULT_FREE_DISK;
       }
-      long replicaSize = ((Number)replicaInfo.getVariable(Type.CORE_IDX.metricsAttribute)).longValue();
+      long replicaSize = ((Number)replicaInfo.get(Type.CORE_IDX.metricsAttribute)).longValue();
       Number replicaSizeGB = (Number)Type.CORE_IDX.convertVal(replicaSize);
       cloudManager.getSimNodeStateProvider().simSetNodeValue(nodeId, ImplicitSnitch.DISK, disk.doubleValue() - replicaSizeGB.doubleValue());
       // fake metrics
       String registry = SolrMetricManager.getRegistryName(SolrInfoBean.Group.core, replicaInfo.getCollection(),
           replicaInfo.getShard(),
-          Utils.parseMetricsReplicaName(replicaInfo.getCollection(), replicaInfo.getCore()));
+          Utils.parseMetricsReplicaName(replicaInfo.getCollection(), replicaInfo.getCoreName()));
       cloudManager.getMetricManager().registry(registry).counter("UPDATE./update.requests");
       cloudManager.getMetricManager().registry(registry).counter("QUERY./select.requests");
       cloudManager.getMetricManager().registerGauge(null, registry,
@@ -752,12 +754,12 @@ public class SimClusterStateProvider implements ClusterStateProvider {
     lock.lockInterruptibly();
     try {
       @SuppressWarnings({"unchecked"})
-      final List<ReplicaInfo> replicas = nodeReplicaMap.computeIfAbsent
+      final List<Replica> replicas = nodeReplicaMap.computeIfAbsent
         (nodeId, Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN);
       synchronized (replicas) {
         for (int i = 0; i < replicas.size(); i++) {
           if (collection.equals(replicas.get(i).getCollection()) && coreNodeName.equals(replicas.get(i).getName())) {
-            ReplicaInfo ri = replicas.remove(i);
+            Replica ri = replicas.remove(i);
             colShardReplicaMap.computeIfAbsent(ri.getCollection(), c -> new ConcurrentHashMap<>())
               .computeIfAbsent(ri.getShard(), s -> new ArrayList<>())
               .remove(ri);
@@ -776,10 +778,10 @@ public class SimClusterStateProvider implements ClusterStateProvider {
               if (disk == null || disk.doubleValue() == 0.0) {
                 throw new Exception("Unexpected value of 'freedisk' (" + disk + ") on node: " + nodeId);
               }
-              if (ri.getVariable(Type.CORE_IDX.metricsAttribute) == null) {
+              if (ri.get(Type.CORE_IDX.metricsAttribute) == null) {
                 throw new RuntimeException("Missing replica size: " + ri);
               }
-              long replicaSize = ((Number)ri.getVariable(Type.CORE_IDX.metricsAttribute)).longValue();
+              long replicaSize = ((Number)ri.get(Type.CORE_IDX.metricsAttribute)).longValue();
               Number replicaSizeGB = (Number)Type.CORE_IDX.convertVal(replicaSize);
               cloudManager.getSimNodeStateProvider().simSetNodeValue(nodeId, ImplicitSnitch.DISK, disk.doubleValue() + replicaSizeGB.doubleValue());
             }
@@ -907,17 +909,17 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       ActionThrottle lt = getThrottle(collection, s.getName());
       synchronized (lt) {
         // collect all active and live
-        List<ReplicaInfo> active = new ArrayList<>();
+        List<Replica> active = new ArrayList<>();
         AtomicBoolean alreadyHasLeader = new AtomicBoolean(false);
         s.getReplicas().forEach(r -> {
             // find our ReplicaInfo for this replica
-            ReplicaInfo ri = getReplicaInfo(r);
+            Replica ri = getReplicaInfo(r);
             if (ri == null) {
               throw new IllegalStateException("-- could not find ReplicaInfo for replica " + r);
             }
             synchronized (ri) {
               if (r.isActive(liveNodes.get())) {
-                if (ri.getVariables().get(ZkStateReader.LEADER_PROP) != null) {
+                if (ri.getProperties().get(ZkStateReader.LEADER_PROP) != null) {
                   if (log.isTraceEnabled()) {
                     log.trace("-- found existing leader {} / {}: {}, {}", collection, s.getName(), ri, r);
                   }
@@ -931,8 +933,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
                   log.trace("-- replica not active on live nodes: {}, {}", liveNodes.get(), r);
                 }
                 if (!liveNodes.contains(r.getNodeName())) {
-                  ri.getVariables().put(ZkStateReader.STATE_PROP, Replica.State.DOWN.toString());
-                  ri.getVariables().remove(ZkStateReader.LEADER_PROP);
+                  ri.getProperties().put(ZkStateReader.STATE_PROP, Replica.State.DOWN.toString());
+                  ri.getProperties().remove(ZkStateReader.LEADER_PROP);
                   stateChanged.set(true);
                 }
               }
@@ -954,8 +956,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
           return;
         }
         // pick first active one
-        ReplicaInfo ri = null;
-        for (ReplicaInfo a : active) {
+        Replica ri = null;
+        for (Replica a : active) {
           if (!a.getType().equals(Replica.Type.PULL)) {
             ri = a;
             break;
@@ -969,7 +971,7 @@ public class SimClusterStateProvider implements ClusterStateProvider {
         lt.minimumWaitBetweenActions();
         lt.markAttemptingAction();
         synchronized (ri) {
-          ri.getVariables().put(ZkStateReader.LEADER_PROP, "true");
+          ri.getProperties().put(ZkStateReader.LEADER_PROP, "true");
         }
         if (log.isDebugEnabled()) {
           log.debug("-- elected new leader for {} / {} (currentVersion={}): {}", collection,
@@ -1106,8 +1108,9 @@ public class SimClusterStateProvider implements ClusterStateProvider {
             replicaProps.put("SEARCHER.searcher.deletedDocs", new AtomicLong(0));
             replicaProps.put("SEARCHER.searcher.numDocs", new AtomicLong(0));
             replicaProps.put("SEARCHER.searcher.maxDoc", new AtomicLong(0));
-            ReplicaInfo ri = new ReplicaInfo("core_node" + Assign.incAndGetId(stateManager, withCollection, 0),
-                coreName, withCollection, withCollectionShard, pos.type, pos.node, replicaProps);
+            Replica ri = new Replica("core_node" + Assign.incAndGetId(stateManager, withCollection, 0),
+                pos.node, withCollection, withCollectionShard, coreName, Replica.State.DOWN,
+                pos.type, replicaProps);
             cloudManager.submit(() -> {
               simAddReplica(pos.node, ri, false);
               // do not count down the latch here
@@ -1129,8 +1132,9 @@ public class SimClusterStateProvider implements ClusterStateProvider {
         replicaProps.put("SEARCHER.searcher.deletedDocs", new AtomicLong(0));
         replicaProps.put("SEARCHER.searcher.numDocs", new AtomicLong(0));
         replicaProps.put("SEARCHER.searcher.maxDoc", new AtomicLong(0));
-        ReplicaInfo ri = new ReplicaInfo("core_node" + Assign.incAndGetId(stateManager, collectionName, 0),
-            coreName, collectionName, pos.shard, pos.type, pos.node, replicaProps);
+        Replica ri = new Replica("core_node" + Assign.incAndGetId(stateManager, collectionName, 0),
+            pos.node, collectionName, pos.shard, coreName, Replica.State.DOWN,
+            pos.type, replicaProps);
         cloudManager.submit(() -> {
           simAddReplica(pos.node, ri, true);
           finalStateLatch.countDown();
@@ -1187,8 +1191,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       opDelays.remove(collection);
       nodeReplicaMap.forEach((n, replicas) -> {
           synchronized (replicas) {  
-            for (Iterator<ReplicaInfo> it = replicas.iterator(); it.hasNext(); ) {
-              ReplicaInfo ri = it.next();
+            for (Iterator<Replica> it = replicas.iterator(); it.hasNext(); ) {
+              Replica ri = it.next();
               if (ri.getCollection().equals(collection)) {
                 it.remove();
                 // update the number of cores in node values
@@ -1292,11 +1296,11 @@ public class SimClusterStateProvider implements ClusterStateProvider {
     }
 
     opDelay(collection, CollectionParams.CollectionAction.MOVEREPLICA.name());
-    ReplicaInfo ri = getReplicaInfo(replica);
+    Replica ri = getReplicaInfo(replica);
     if (ri != null) {
-      if (ri.getVariable(Type.CORE_IDX.tagName) != null) {
+      if (ri.get(Type.CORE_IDX.tagName) != null) {
         // simulate very large replicas - add additional delay of 5s / GB
-        long sizeInGB = ((Number)ri.getVariable(Type.CORE_IDX.tagName)).longValue();
+        long sizeInGB = ((Number)ri.get(Type.CORE_IDX.tagName)).longValue();
         long opDelay = opDelays.getOrDefault(ri.getCollection(), Collections.emptyMap())
             .getOrDefault(CollectionParams.CollectionAction.MOVEREPLICA.name(), defaultOpDelays.get(CollectionParams.CollectionAction.MOVEREPLICA.name()));
         opDelay = TimeUnit.MILLISECONDS.toSeconds(opDelay);
@@ -1315,7 +1319,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
     Map<String, Object> props = replica.getProperties().entrySet().stream()
         .filter(e -> !NO_COPY_PROPS.contains(e.getKey()))
         .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
-    ReplicaInfo newReplica = new ReplicaInfo(coreNodeName, newSolrCoreName, collection, slice.getName(), replica.getType(), targetNode, props);
+    Replica newReplica = new Replica(coreNodeName, targetNode, collection, slice.getName(), newSolrCoreName,
+        Replica.State.DOWN, replica.getType(), props);
     log.debug("-- new replica: {}", newReplica);
     // xxx should run leader election here already?
     simAddReplica(targetNode, newReplica, false);
@@ -1458,7 +1463,7 @@ public class SimClusterStateProvider implements ClusterStateProvider {
     if (sessionWrapper != null) sessionWrapper.release();
 
     // adjust numDocs / deletedDocs / maxDoc
-    String numDocsStr = String.valueOf(getReplicaInfo(leader).getVariable("SEARCHER.searcher.numDocs", "0"));
+    String numDocsStr = String.valueOf(getReplicaInfo(leader).get("SEARCHER.searcher.numDocs", "0"));
     long numDocs = Long.parseLong(numDocsStr);
     long newNumDocs = numDocs / subSlices.size();
     long remainderDocs = numDocs % subSlices.size();
@@ -1504,8 +1509,9 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       replicaProps.put(Type.CORE_IDX.metricsAttribute, new AtomicLong(replicasIndexSize));
       replicaProps.put(Variable.coreidxsize, new AtomicDouble((Double)Type.CORE_IDX.convertVal(replicasIndexSize)));
 
-      ReplicaInfo ri = new ReplicaInfo("core_node" + Assign.incAndGetId(stateManager, collectionName, 0),
-          solrCoreName, collectionName, replicaPosition.shard, replicaPosition.type, subShardNodeName, replicaProps);
+      Replica ri = new Replica("core_node" + Assign.incAndGetId(stateManager, collectionName, 0),
+          subShardNodeName, collectionName, replicaPosition.shard, solrCoreName,
+          Replica.State.DOWN, replicaPosition.type, replicaProps);
       simAddReplica(replicaPosition.node, ri, false);
     }
     simRunLeaderElection(Collections.singleton(collectionName), true);
@@ -1620,9 +1626,9 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       colShardReplicaMap.computeIfAbsent(collectionName, c -> new ConcurrentHashMap<>()).remove(sliceName);
       nodeReplicaMap.forEach((n, replicas) -> {
           synchronized (replicas) {
-            Iterator<ReplicaInfo> it = replicas.iterator();
+            Iterator<Replica> it = replicas.iterator();
             while (it.hasNext()) {
-              ReplicaInfo ri = it.next();
+              Replica ri = it.next();
               if (ri.getCollection().equals(collectionName) && ri.getShard().equals(sliceName)) {
                 it.remove();
               }
@@ -1700,8 +1706,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
           throw new IOException("-- no leader in " + s);
         }
         cloudManager.getMetricManager().registry(createRegistryName(collection, s.getName(), leader)).counter("UPDATE./update.requests").inc();
-        ReplicaInfo ri = getReplicaInfo(leader);
-        Number numDocs = (Number)ri.getVariable("SEARCHER.searcher.numDocs");
+        Replica ri = getReplicaInfo(leader);
+        Number numDocs = (Number)ri.get("SEARCHER.searcher.numDocs");
         if (numDocs == null || numDocs.intValue() <= 0) {
           if (log.isDebugEnabled()) {
             log.debug("-- attempting to delete nonexistent doc {} from {}", id, s.getLeader());
@@ -1727,7 +1733,7 @@ public class SimClusterStateProvider implements ClusterStateProvider {
           continue;
         }
         deletesPerShard.computeIfAbsent(s.getName(), slice -> new AtomicLong(0)).incrementAndGet();
-        Number indexSize = (Number)ri.getVariable(Type.CORE_IDX.metricsAttribute);
+        Number indexSize = (Number)ri.get(Type.CORE_IDX.metricsAttribute);
         if (indexSize != null) {
           indexSizePerShard.put(s.getName(), indexSize);
         }
@@ -1775,14 +1781,14 @@ public class SimClusterStateProvider implements ClusterStateProvider {
           }
 
           cloudManager.getMetricManager().registry(createRegistryName(collection, s.getName(), leader)).counter("UPDATE./update.requests").inc();
-          ReplicaInfo ri = getReplicaInfo(leader);
-          Number numDocs = (Number)ri.getVariable("SEARCHER.searcher.numDocs");
+          Replica ri = getReplicaInfo(leader);
+          Number numDocs = (Number)ri.get("SEARCHER.searcher.numDocs");
           if (numDocs == null || numDocs.intValue() == 0) {
             continue;
           }
           lock.lockInterruptibly();
           try {
-            Number indexSize = (Number)ri.getVariable(Type.CORE_IDX.metricsAttribute);
+            Number indexSize = (Number)ri.get(Type.CORE_IDX.metricsAttribute);
             if (indexSize != null) {
               long delta = indexSize.longValue() < SimCloudManager.DEFAULT_IDX_SIZE_BYTES ? 0 :
                   indexSize.longValue() - SimCloudManager.DEFAULT_IDX_SIZE_BYTES;
@@ -1974,8 +1980,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       try {
         coll.getSlices().forEach(s -> {
           Replica leader = s.getLeader();
-          ReplicaInfo ri = getReplicaInfo(leader);
-          Number numDocs = (Number)ri.getVariable("SEARCHER.searcher.numDocs");
+          Replica ri = getReplicaInfo(leader);
+          Number numDocs = (Number)ri.get("SEARCHER.searcher.numDocs");
           if (numDocs == null || numDocs.intValue() == 0) {
             numDocs = 0;
           }
@@ -2015,8 +2021,8 @@ public class SimClusterStateProvider implements ClusterStateProvider {
       if (r == null) {
         throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, collection + "/" + s.getName() + " has no leader");
       }
-      ReplicaInfo ri = getReplicaInfo(r);
-      Number numDocs = (Number)ri.getVariable("SEARCHER.searcher.numDocs", 0L);
+      Replica ri = getReplicaInfo(r);
+      Number numDocs = (Number)ri.get("SEARCHER.searcher.numDocs", 0L);
       count.addAndGet(numDocs.longValue());
       AtomicLong bufferedUpdates = (AtomicLong)sliceProperties.get(collection).get(s.getName()).get(BUFFERED_UPDATES);
       if (bufferedUpdates != null) {
@@ -2212,7 +2218,7 @@ public class SimClusterStateProvider implements ClusterStateProvider {
    *               divided by the number of replicas.
    */
   public void simSetShardValue(String collection, String shard, String key, Object value, boolean delta, boolean divide) throws Exception {
-    final List<ReplicaInfo> infos;
+    final List<Replica> infos;
     if (shard == null) {
       infos = new ArrayList<>();
       colShardReplicaMap.computeIfAbsent(collection, c -> new ConcurrentHashMap<>())
@@ -2231,13 +2237,13 @@ public class SimClusterStateProvider implements ClusterStateProvider {
         value = ((Number) value).doubleValue() / infos.size();
       }
     }
-    for (ReplicaInfo r : infos) {
+    for (Replica r : infos) {
       synchronized (r) {
         if (value == null) {
-          r.getVariables().remove(key);
+          r.getProperties().remove(key);
         } else {
           if (delta) {
-            Object prevValue = r.getVariables().get(key);
+            Object prevValue = r.getProperties().get(key);
             if (prevValue != null) {
               if ((prevValue instanceof Number) && (value instanceof Number)) {
                 if (((prevValue instanceof Long) || (prevValue instanceof Integer) ||
@@ -2250,14 +2256,14 @@ public class SimClusterStateProvider implements ClusterStateProvider {
                   } else if (prevValue instanceof AtomicInteger) {
                     ((AtomicInteger)prevValue).set(((Number)prevValue).intValue() + ((Number)value).intValue());
                   } else {
-                    r.getVariables().put(key, newValue);
+                    r.getProperties().put(key, newValue);
                   }
                 } else {
                   double newValue = ((Number)prevValue).doubleValue() + ((Number)value).doubleValue();
                   if (prevValue instanceof AtomicDouble) {
                     ((AtomicDouble)prevValue).set(newValue);
                   } else {
-                    r.getVariables().put(key, newValue);
+                    r.getProperties().put(key, newValue);
                   }
                 }
               } else {
@@ -2265,24 +2271,24 @@ public class SimClusterStateProvider implements ClusterStateProvider {
               }
             } else {
               if (value instanceof Integer) {
-                r.getVariables().put(key, new AtomicInteger((Integer)value));
+                r.getProperties().put(key, new AtomicInteger((Integer)value));
               } else if (value instanceof Long) {
-                r.getVariables().put(key, new AtomicLong((Long)value));
+                r.getProperties().put(key, new AtomicLong((Long)value));
               } else if (value instanceof Double) {
-                r.getVariables().put(key, new AtomicDouble((Double)value));
+                r.getProperties().put(key, new AtomicDouble((Double)value));
               } else {
-                r.getVariables().put(key, value);
+                r.getProperties().put(key, value);
               }
             }
           } else {
             if (value instanceof Integer) {
-              r.getVariables().put(key, new AtomicInteger((Integer)value));
+              r.getProperties().put(key, new AtomicInteger((Integer)value));
             } else if (value instanceof Long) {
-              r.getVariables().put(key, new AtomicLong((Long)value));
+              r.getProperties().put(key, new AtomicLong((Long)value));
             } else if (value instanceof Double) {
-              r.getVariables().put(key, new AtomicDouble((Double)value));
+              r.getProperties().put(key, new AtomicDouble((Double)value));
             } else {
-              r.getVariables().put(key, value);
+              r.getProperties().put(key, value);
             }
           }
         }
@@ -2291,26 +2297,26 @@ public class SimClusterStateProvider implements ClusterStateProvider {
   }
 
   @SuppressWarnings({"unchecked"})
-  public void simSetReplicaValues(String node, Map<String, Map<String, List<ReplicaInfo>>> source, boolean overwrite) {
-    List<ReplicaInfo> infos = nodeReplicaMap.get(node);
+  public void simSetReplicaValues(String node, Map<String, Map<String, List<Replica>>> source, boolean overwrite) {
+    List<Replica> infos = nodeReplicaMap.get(node);
     if (infos == null) {
       throw new RuntimeException("Node not present: " + node);
     }
     // core_node_name is not unique across collections
-    Map<String, Map<String, ReplicaInfo>> infoMap = new HashMap<>();
+    Map<String, Map<String, Replica>> infoMap = new HashMap<>();
     infos.forEach(ri -> infoMap.computeIfAbsent(ri.getCollection(), Utils.NEW_HASHMAP_FUN).put(ri.getName(), ri));
     source.forEach((coll, shards) -> shards.forEach((shard, replicas) -> replicas.forEach(r -> {
-      ReplicaInfo target = infoMap.getOrDefault(coll, Collections.emptyMap()).get(r.getName());
+      Replica target = infoMap.getOrDefault(coll, Collections.emptyMap()).get(r.getName());
       if (target == null) {
         throw new RuntimeException("Unable to find simulated replica of " + r);
       }
-      r.getVariables().forEach((k, v) -> {
-        if (target.getVariables().containsKey(k)) {
+      r.getProperties().forEach((k, v) -> {
+        if (target.getProperties().containsKey(k)) {
           if (overwrite) {
-            target.getVariables().put(k, v);
+            target.getProperties().put(k, v);
           }
         } else {
-          target.getVariables().put(k, v);
+          target.getProperties().put(k, v);
         }
       });
     })));
@@ -2321,29 +2327,29 @@ public class SimClusterStateProvider implements ClusterStateProvider {
    * @param node node id
    * @return copy of the list of replicas on that node, or empty list if none
    */
-  public List<ReplicaInfo> simGetReplicaInfos(String node) {
+  public List<Replica> simGetReplicaInfos(String node) {
     @SuppressWarnings({"unchecked"})
-    final List<ReplicaInfo> replicas = nodeReplicaMap.computeIfAbsent
+    final List<Replica> replicas = nodeReplicaMap.computeIfAbsent
       (node, Utils.NEW_SYNCHRONIZED_ARRAYLIST_FUN);
     // make a defensive copy to avoid ConcurrentModificationException
-    return Arrays.asList(replicas.toArray(new ReplicaInfo[replicas.size()]));
+    return Arrays.asList(replicas.toArray(new Replica[replicas.size()]));
   }
 
-  public List<ReplicaInfo> simGetReplicaInfos(String collection, String shard) {
-    List<ReplicaInfo> replicas = colShardReplicaMap.computeIfAbsent(collection, c -> new ConcurrentHashMap<>())
+  public List<Replica> simGetReplicaInfos(String collection, String shard) {
+    List<Replica> replicas = colShardReplicaMap.computeIfAbsent(collection, c -> new ConcurrentHashMap<>())
         .computeIfAbsent(shard, s -> new ArrayList<>());
     if (replicas == null) {
       return Collections.emptyList();
     } else {
       // make a defensive copy to avoid ConcurrentModificationException
-      return Arrays.asList(replicas.toArray(new ReplicaInfo[replicas.size()]));
+      return Arrays.asList(replicas.toArray(new Replica[replicas.size()]));
     }
   }
 
-  public ReplicaInfo simGetReplicaInfo(String collection, String coreNode) {
-    Map<String, List<ReplicaInfo>> shardsReplicas = colShardReplicaMap.computeIfAbsent(collection, c -> new ConcurrentHashMap<>());
-    for (List<ReplicaInfo> replicas : shardsReplicas.values()) {
-      for (ReplicaInfo ri : replicas) {
+  public Replica simGetReplicaInfo(String collection, String coreNode) {
+    Map<String, List<Replica>> shardsReplicas = colShardReplicaMap.computeIfAbsent(collection, c -> new ConcurrentHashMap<>());
+    for (List<Replica> replicas : shardsReplicas.values()) {
+      for (Replica ri : replicas) {
         if (ri.getName().equals(coreNode)) {
           return ri;
         }
@@ -2388,10 +2394,10 @@ public class SimClusterStateProvider implements ClusterStateProvider {
           totalReplicas += s.getReplicas().size();
           if (s.getState() != Slice.State.ACTIVE) {
             if (!s.getReplicas().isEmpty()) {
-              ReplicaInfo ri = getReplicaInfo(s.getReplicas().iterator().next());
+              Replica ri = getReplicaInfo(s.getReplicas().iterator().next());
               if (ri != null) {
-                Number numDocs = (Number)ri.getVariable("SEARCHER.searcher.numDocs");
-                Number numBytes = (Number)ri.getVariable(Type.CORE_IDX.metricsAttribute);
+                Number numDocs = (Number)ri.get("SEARCHER.searcher.numDocs");
+                Number numBytes = (Number)ri.get(Type.CORE_IDX.metricsAttribute);
                 if (numDocs != null) {
                   inactiveDocs.addValue(numDocs.doubleValue());
                 }
@@ -2421,7 +2427,7 @@ public class SimClusterStateProvider implements ClusterStateProvider {
               leader = s.getReplicas().iterator().next();
             }
           }
-          ReplicaInfo ri = null;
+          Replica ri = null;
           if (leader != null) {
             ri = getReplicaInfo(leader);
             if (ri == null) {
@@ -2429,9 +2435,9 @@ public class SimClusterStateProvider implements ClusterStateProvider {
             }
           }
           if (ri != null) {
-            Number numDocs = (Number)ri.getVariable("SEARCHER.searcher.numDocs");
-            Number delDocs = (Number)ri.getVariable("SEARCHER.searcher.deleteDocs");
-            Number numBytes = (Number)ri.getVariable(Type.CORE_IDX.metricsAttribute);
+            Number numDocs = (Number)ri.get("SEARCHER.searcher.numDocs");
+            Number delDocs = (Number)ri.get("SEARCHER.searcher.deleteDocs");
+            Number numBytes = (Number)ri.get(Type.CORE_IDX.metricsAttribute);
             if (numDocs != null) {
               docs.addValue(numDocs.doubleValue());
             }
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimNodeStateProvider.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimNodeStateProvider.java
index 17b6d28..e7a1fd4 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimNodeStateProvider.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimNodeStateProvider.java
@@ -35,7 +35,7 @@ import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.ZkStateReader;
 import org.apache.solr.common.util.Utils;
 import org.slf4j.Logger;
@@ -291,14 +291,14 @@ public class SimNodeStateProvider implements NodeStateProvider {
       String collection = m.group(1);
       String shard = m.group(2);
       String replica = m.group(3);
-      List<ReplicaInfo> replicas = clusterStateProvider.simGetReplicaInfos(collection, shard);
+      List<Replica> replicas = clusterStateProvider.simGetReplicaInfos(collection, shard);
       replicas.forEach(r -> {
-        if (r.getNode().equals(node) && r.getCore().endsWith(replica)) {
-          Object value = r.getVariables().get(key);
+        if (r.getNodeName().equals(node) && r.getCoreName().endsWith(replica)) {
+          Object value = r.getProperties().get(key);
           if (value != null) {
             values.put(tag, value);
           } else {
-            value = r.getVariables().get(tag);
+            value = r.getProperties().get(tag);
             if (value != null) {
               values.put(tag, value);
             }
@@ -334,18 +334,18 @@ public class SimNodeStateProvider implements NodeStateProvider {
   }
 
   @Override
-  public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
-    List<ReplicaInfo> replicas = clusterStateProvider.simGetReplicaInfos(node);
+  public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
+    List<Replica> replicas = clusterStateProvider.simGetReplicaInfos(node);
     if (replicas == null || replicas.isEmpty()) {
       return new HashMap<>();
     }
-    Map<String, Map<String, List<ReplicaInfo>>> res = new HashMap<>();
+    Map<String, Map<String, List<Replica>>> res = new HashMap<>();
     // TODO: probably needs special treatment for "metrics:solr.core..." tags
-    for (ReplicaInfo r : replicas) {
+    for (Replica r : replicas) {
       @SuppressWarnings({"unchecked"})
-      Map<String, List<ReplicaInfo>> perCollection = res.computeIfAbsent(r.getCollection(), Utils.NEW_HASHMAP_FUN);
+      Map<String, List<Replica>> perCollection = res.computeIfAbsent(r.getCollection(), Utils.NEW_HASHMAP_FUN);
       @SuppressWarnings({"unchecked"})
-      List<ReplicaInfo> perShard = perCollection.computeIfAbsent(r.getShard(), Utils.NEW_ARRAYLIST_FUN);
+      List<Replica> perShard = perCollection.computeIfAbsent(r.getShard(), Utils.NEW_ARRAYLIST_FUN);
       // XXX filter out some properties?
       perShard.add(r);
     }
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimScenario.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimScenario.java
index 6adb812..5cba5f5 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimScenario.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimScenario.java
@@ -49,7 +49,6 @@ import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Clause;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
 import org.apache.solr.client.solrj.cloud.autoscaling.PolicyHelper;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventProcessorStage;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
@@ -66,6 +65,7 @@ import org.apache.solr.cloud.autoscaling.AutoScalingHandler;
 import org.apache.solr.cloud.autoscaling.TriggerEvent;
 import org.apache.solr.cloud.autoscaling.TriggerListener;
 import org.apache.solr.cloud.autoscaling.TriggerListenerBase;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.params.AutoScalingParams;
 import org.apache.solr.common.params.CollectionAdminParams;
 import org.apache.solr.common.params.CollectionParams;
@@ -561,14 +561,14 @@ public class SimScenario implements AutoCloseable {
         }
         Map<String, Object> paramsMap = new LinkedHashMap<>();
         params.toMap(paramsMap);
-        ReplicaInfo info = scenario.cluster.getSimClusterStateProvider().simGetReplicaInfo(
+        Replica info = scenario.cluster.getSimClusterStateProvider().simGetReplicaInfo(
             params.get(CollectionAdminParams.COLLECTION), params.get("replica"));
         if (info == null) {
           log.error("Could not find ReplicaInfo for params: {}", params);
         } else if (scenario.verbose) {
           paramsMap.put("replicaInfo", info);
-        } else if (info.getVariable(Variable.Type.CORE_IDX.tagName) != null) {
-          paramsMap.put(Variable.Type.CORE_IDX.tagName, info.getVariable(Variable.Type.CORE_IDX.tagName));
+        } else if (info.get(Variable.Type.CORE_IDX.tagName) != null) {
+          paramsMap.put(Variable.Type.CORE_IDX.tagName, info.get(Variable.Type.CORE_IDX.tagName));
         }
         try {
           scenario.cluster.request(operation);
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimUtils.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimUtils.java
index 5141317..944049e 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimUtils.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SimUtils.java
@@ -36,7 +36,6 @@ import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Cell;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Row;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
 import org.apache.solr.client.solrj.request.CollectionApiMapping;
@@ -110,9 +109,9 @@ public class SimUtils {
         }
       });
     });
-    Map<String, Map<String, ReplicaInfo>> allReplicaInfos = new HashMap<>();
+    Map<String, Map<String, Replica>> allReplicaInfos = new HashMap<>();
     solrCloudManager.getClusterStateProvider().getLiveNodes().forEach(n -> {
-      Map<String, Map<String, List<ReplicaInfo>>> infos = solrCloudManager.getNodeStateProvider().getReplicaInfo(n, replicaTags);
+      Map<String, Map<String, List<Replica>>> infos = solrCloudManager.getNodeStateProvider().getReplicaInfo(n, replicaTags);
       infos.forEach((coll, shards) -> shards.forEach((shard, replicas) -> replicas.forEach(r -> {
         if (allReplicaInfos.containsKey(r.getName())) {
           throw new RuntimeException("duplicate core_node name in NodeStateProvider: " + allReplicaInfos.get(r.getName()) + " versus " + r);
@@ -152,9 +151,9 @@ public class SimUtils {
     });
     // verify all replicas have size info
     allReplicaInfos.forEach((coll, replicas) -> replicas.forEach((core, ri) -> {
-          Number size = (Number) ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute);
+          Number size = (Number) ri.get(Variable.Type.CORE_IDX.metricsAttribute);
           if (size == null) {
-            size = (Number) ri.getVariable(Variable.Type.CORE_IDX.tagName);
+            size = (Number) ri.get(Variable.Type.CORE_IDX.tagName);
             if (size == null) {
 //              for (String node : solrCloudManager.getClusterStateProvider().getLiveNodes()) {
 //                log.error("Check for missing values: {}: {}", node, solrCloudManager.getNodeStateProvider().getReplicaInfo(node, SnapshotNodeStateProvider.REPLICA_TAGS));
@@ -261,25 +260,25 @@ public class SimUtils {
       }
       row.forEachReplica(ri -> {
         Map<String, Object> perReplica = collReplicas.computeIfAbsent(ri.getCollection(), c -> new TreeMap<>())
-            .computeIfAbsent(ri.getCore().substring(ri.getCollection().length() + 1), core -> new LinkedHashMap<>());
+            .computeIfAbsent(ri.getCoreName().substring(ri.getCollection().length() + 1), core -> new LinkedHashMap<>());
 //            if (ri.getVariable(Variable.Type.CORE_IDX.tagName) != null) {
 //              perReplica.put(Variable.Type.CORE_IDX.tagName, ri.getVariable(Variable.Type.CORE_IDX.tagName));
 //            }
-        if (ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute) != null) {
-          perReplica.put(Variable.Type.CORE_IDX.metricsAttribute, ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute));
-          if (ri.getVariable(Variable.Type.CORE_IDX.tagName) != null) {
-            perReplica.put(Variable.Type.CORE_IDX.tagName, ri.getVariable(Variable.Type.CORE_IDX.tagName));
+        if (ri.get(Variable.Type.CORE_IDX.metricsAttribute) != null) {
+          perReplica.put(Variable.Type.CORE_IDX.metricsAttribute, ri.get(Variable.Type.CORE_IDX.metricsAttribute));
+          if (ri.get(Variable.Type.CORE_IDX.tagName) != null) {
+            perReplica.put(Variable.Type.CORE_IDX.tagName, ri.get(Variable.Type.CORE_IDX.tagName));
           } else {
             perReplica.put(Variable.Type.CORE_IDX.tagName,
-                Variable.Type.CORE_IDX.convertVal(ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute)));
+                Variable.Type.CORE_IDX.convertVal(ri.get(Variable.Type.CORE_IDX.metricsAttribute)));
           }
         }
         perReplica.put("coreNode", ri.getName());
-        if (ri.isLeader || ri.getBool("leader", false)) {
+        if (ri.isLeader() || ri.getBool("leader", false)) {
           perReplica.put("leader", true);
           Double totalSize = (Double)collStats.computeIfAbsent(ri.getCollection(), c -> new HashMap<>())
               .computeIfAbsent("avgShardSize", size -> 0.0);
-          Number riSize = (Number)ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute);
+          Number riSize = (Number)ri.get(Variable.Type.CORE_IDX.metricsAttribute);
           if (riSize != null) {
             totalSize += riSize.doubleValue();
             collStats.get(ri.getCollection()).put("avgShardSize", totalSize);
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotCloudManager.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotCloudManager.java
index 9dc0b4a..2a0a25d 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotCloudManager.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotCloudManager.java
@@ -42,11 +42,11 @@ import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
 import org.apache.solr.client.solrj.cloud.autoscaling.PolicyHelper;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester;
 import org.apache.solr.client.solrj.impl.ClusterStateProvider;
 import org.apache.solr.client.solrj.request.V2Request;
 import org.apache.solr.common.cloud.ClusterState;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.params.CollectionAdminParams;
 import org.apache.solr.common.params.SolrParams;
 import org.apache.solr.common.util.ObjectCache;
@@ -193,7 +193,7 @@ public class SnapshotCloudManager implements SolrCloudManager {
           if (s.getOperation() instanceof V2Request) {
             params = SimUtils.v2AdminRequestToV1Params((V2Request)s.getOperation());
           }
-          ReplicaInfo info = nodeStateProvider.getReplicaInfo(
+          Replica info = nodeStateProvider.getReplicaInfo(
               params.get(CollectionAdminParams.COLLECTION), params.get("replica"));
           if (info == null) {
             log.warn("Can't find ReplicaInfo for suggested operation: {}", s);
diff --git a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotNodeStateProvider.java b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotNodeStateProvider.java
index e8b7828..fca154a 100644
--- a/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotNodeStateProvider.java
+++ b/solr/core/src/java/org/apache/solr/cloud/autoscaling/sim/SnapshotNodeStateProvider.java
@@ -30,15 +30,15 @@ import java.util.Set;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
+import org.apache.solr.common.cloud.Replica;
 
 /**
  * Read-only snapshot of another {@link NodeStateProvider}.
  */
 public class SnapshotNodeStateProvider implements NodeStateProvider {
   private Map<String, Map<String, Object>> nodeValues = new LinkedHashMap<>();
-  private Map<String, Map<String, Map<String, List<ReplicaInfo>>>> replicaInfos = new LinkedHashMap<>();
+  private Map<String, Map<String, Map<String, List<Replica>>>> replicaInfos = new LinkedHashMap<>();
 
   private static double GB = 1024.0d * 1024.0d * 1024.0d;
 
@@ -59,29 +59,29 @@ public class SnapshotNodeStateProvider implements NodeStateProvider {
     replicaTags.addAll(config.getPolicy().getPerReplicaAttributes());
     for (String node : other.getClusterStateProvider().getLiveNodes()) {
       nodeValues.put(node, new LinkedHashMap<>(other.getNodeStateProvider().getNodeValues(node, nodeTags)));
-      Map<String, Map<String, List<ReplicaInfo>>> infos = other.getNodeStateProvider().getReplicaInfo(node, replicaTags);
+      Map<String, Map<String, List<Replica>>> infos = other.getNodeStateProvider().getReplicaInfo(node, replicaTags);
       infos.forEach((collection, shards) -> {
         shards.forEach((shard, replicas) -> {
           replicas.forEach(r -> {
-            List<ReplicaInfo> myReplicas = replicaInfos
+            List<Replica> myReplicas = replicaInfos
                 .computeIfAbsent(node, n -> new LinkedHashMap<>())
                 .computeIfAbsent(collection, c -> new LinkedHashMap<>())
                 .computeIfAbsent(shard, s -> new ArrayList<>());
             Map<String, Object> rMap = new LinkedHashMap<>();
             r.toMap(rMap);
-            if (r.isLeader) { // ReplicaInfo.toMap doesn't write this!!!
+            if (r.isLeader()) { // ReplicaInfo.toMap doesn't write this!!!
               ((Map<String, Object>)rMap.values().iterator().next()).put("leader", "true");
             }
-            ReplicaInfo ri = new ReplicaInfo(rMap);
+            Replica ri = new Replica(rMap);
             // put in "leader" again if present
-            if (r.isLeader) {
-              ri.getVariables().put("leader", "true");
+            if (r.isLeader()) {
+              ri.getProperties().put("leader", "true");
             }
             // externally produced snapshots may not include the right units
-            if (ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute) == null) {
-              if (ri.getVariable(Variable.Type.CORE_IDX.tagName) != null) {
-                Number indexSizeGB = (Number) ri.getVariable(Variable.Type.CORE_IDX.tagName);
-                ri.getVariables().put(Variable.Type.CORE_IDX.metricsAttribute, indexSizeGB.doubleValue() * GB);
+            if (ri.get(Variable.Type.CORE_IDX.metricsAttribute) == null) {
+              if (ri.get(Variable.Type.CORE_IDX.tagName) != null) {
+                Number indexSizeGB = (Number) ri.get(Variable.Type.CORE_IDX.tagName);
+                ri.getProperties().put(Variable.Type.CORE_IDX.metricsAttribute, indexSizeGB.doubleValue() * GB);
               } else {
                 throw new RuntimeException("Missing size information for replica: " + ri);
               }
@@ -102,21 +102,21 @@ public class SnapshotNodeStateProvider implements NodeStateProvider {
     Objects.requireNonNull(snapshot);
     nodeValues = (Map<String, Map<String, Object>>)snapshot.getOrDefault("nodeValues", Collections.emptyMap());
     ((Map<String, Object>)snapshot.getOrDefault("replicaInfos", Collections.emptyMap())).forEach((node, v) -> {
-      Map<String, Map<String, List<ReplicaInfo>>> perNode = replicaInfos.computeIfAbsent(node, n -> new LinkedHashMap<>());
+      Map<String, Map<String, List<Replica>>> perNode = replicaInfos.computeIfAbsent(node, n -> new LinkedHashMap<>());
       ((Map<String, Object>)v).forEach((collection, shards) -> {
-        Map<String, List<ReplicaInfo>> perColl = perNode.computeIfAbsent(collection, c -> new LinkedHashMap<>());
+        Map<String, List<Replica>> perColl = perNode.computeIfAbsent(collection, c -> new LinkedHashMap<>());
         ((Map<String, Object>)shards).forEach((shard, replicas) -> {
-          List<ReplicaInfo> infos = perColl.computeIfAbsent(shard, s -> new ArrayList<>());
+          List<Replica> infos = perColl.computeIfAbsent(shard, s -> new ArrayList<>());
           ((List<Map<String, Object>>)replicas).forEach(replicaMap -> {
-            ReplicaInfo ri = new ReplicaInfo(new LinkedHashMap<>(replicaMap)); // constructor modifies this map
-            if (ri.isLeader) {
-              ri.getVariables().put("leader", "true");
+            Replica ri = new Replica(new LinkedHashMap<>(replicaMap)); // constructor modifies this map
+            if (ri.isLeader()) {
+              ri.getProperties().put("leader", "true");
             }
             // externally produced snapshots may not include the right units
-            if (ri.getVariable(Variable.Type.CORE_IDX.metricsAttribute) == null) {
-                if (ri.getVariable(Variable.Type.CORE_IDX.tagName) != null) {
-                  Number indexSizeGB = (Number) ri.getVariable(Variable.Type.CORE_IDX.tagName);
-                  ri.getVariables().put(Variable.Type.CORE_IDX.metricsAttribute, indexSizeGB.doubleValue() * GB);
+            if (ri.get(Variable.Type.CORE_IDX.metricsAttribute) == null) {
+                if (ri.get(Variable.Type.CORE_IDX.tagName) != null) {
+                  Number indexSizeGB = (Number) ri.get(Variable.Type.CORE_IDX.tagName);
+                  ri.getProperties().put(Variable.Type.CORE_IDX.metricsAttribute, indexSizeGB.doubleValue() * GB);
                 } else {
                   throw new RuntimeException("Missing size information for replica: " + ri);
               }
@@ -148,7 +148,7 @@ public class SnapshotNodeStateProvider implements NodeStateProvider {
                 .computeIfAbsent(shard, s -> new ArrayList<>());
             Map<String, Object> rMap = new LinkedHashMap<>();
             r.toMap(rMap);
-            if (r.isLeader) { // ReplicaInfo.toMap doesn't write this!!!
+            if (r.isLeader()) { // ReplicaInfo.toMap doesn't write this!!!
               ((Map<String, Object>)rMap.values().iterator().next()).put("leader", "true");
             }
             myReplicas.add(rMap);
@@ -165,17 +165,17 @@ public class SnapshotNodeStateProvider implements NodeStateProvider {
   }
 
   @Override
-  public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
-    Map<String, Map<String, List<ReplicaInfo>>> result = new LinkedHashMap<>();
-    Map<String, Map<String, List<ReplicaInfo>>> infos = replicaInfos.getOrDefault(node, Collections.emptyMap());
+  public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
+    Map<String, Map<String, List<Replica>>> result = new LinkedHashMap<>();
+    Map<String, Map<String, List<Replica>>> infos = replicaInfos.getOrDefault(node, Collections.emptyMap());
     // deep copy
     infos.forEach((coll, shards) -> {
       shards.forEach((shard, replicas) -> {
         replicas.forEach(ri -> {
-          List<ReplicaInfo> myReplicas = result
+          List<Replica> myReplicas = result
               .computeIfAbsent(coll, c -> new LinkedHashMap<>())
               .computeIfAbsent(shard, s -> new ArrayList<>());
-          ReplicaInfo myReplica = (ReplicaInfo)ri.clone();
+          Replica myReplica = (Replica)ri.clone();
           myReplicas.add(myReplica);
         });
       });
@@ -183,12 +183,12 @@ public class SnapshotNodeStateProvider implements NodeStateProvider {
     return result;
   }
 
-  public ReplicaInfo getReplicaInfo(String collection, String coreNode) {
-    for (Map<String, Map<String, List<ReplicaInfo>>> perNode : replicaInfos.values()) {
-      for (List<ReplicaInfo> perShard : perNode.getOrDefault(collection, Collections.emptyMap()).values()) {
-        for (ReplicaInfo ri : perShard) {
+  public Replica getReplicaInfo(String collection, String coreNode) {
+    for (Map<String, Map<String, List<Replica>>> perNode : replicaInfos.values()) {
+      for (List<Replica> perShard : perNode.getOrDefault(collection, Collections.emptyMap()).values()) {
+        for (Replica ri : perShard) {
           if (ri.getName().equals(coreNode)) {
-            return (ReplicaInfo)ri.clone();
+            return (Replica)ri.clone();
           }
         }
       }
diff --git a/solr/core/src/java/org/apache/solr/cloud/overseer/NodeMutator.java b/solr/core/src/java/org/apache/solr/cloud/overseer/NodeMutator.java
index 56bcfd5..3f1971e 100644
--- a/solr/core/src/java/org/apache/solr/cloud/overseer/NodeMutator.java
+++ b/solr/core/src/java/org/apache/solr/cloud/overseer/NodeMutator.java
@@ -64,8 +64,8 @@ public class NodeMutator {
           if (rNodeName.equals(nodeName)) {
             log.debug("Update replica state for {} to {}", replica, Replica.State.DOWN);
             Map<String, Object> props = replica.shallowCopy();
-            props.put(ZkStateReader.STATE_PROP, Replica.State.DOWN.toString());
-            Replica newReplica = new Replica(replica.getName(), props, collection, slice.getName());
+            Replica newReplica = new Replica(replica.getName(), replica.node, replica.collection, slice.getName(), replica.core,
+                Replica.State.DOWN, replica.type, props);
             newReplicas.put(replica.getName(), newReplica);
             needToUpdateCollection = true;
           }
diff --git a/solr/core/src/java/org/apache/solr/cloud/overseer/ReplicaMutator.java b/solr/core/src/java/org/apache/solr/cloud/overseer/ReplicaMutator.java
index 769be53..3654ea6 100644
--- a/solr/core/src/java/org/apache/solr/cloud/overseer/ReplicaMutator.java
+++ b/solr/core/src/java/org/apache/solr/cloud/overseer/ReplicaMutator.java
@@ -72,7 +72,7 @@ public class ReplicaMutator {
 
     Map<String, Object> replicaProps = new LinkedHashMap<>(replica.getProperties());
     replicaProps.put(key, value);
-    return new Replica(replica.getName(), replicaProps, replica.getCollection(), replica.getSlice());
+    return new Replica(replica.getName(), replicaProps, replica.getCollection(), replica.getShard());
   }
 
   protected Replica unsetProperty(Replica replica, String key) {
@@ -81,7 +81,7 @@ public class ReplicaMutator {
     if (!replica.containsKey(key)) return replica;
     Map<String, Object> replicaProps = new LinkedHashMap<>(replica.getProperties());
     replicaProps.remove(key);
-    return new Replica(replica.getName(), replicaProps, replica.getCollection(), replica.getSlice());
+    return new Replica(replica.getName(), replicaProps, replica.getCollection(), replica.getShard());
   }
 
   protected Replica setLeader(Replica replica) {
diff --git a/solr/core/src/java/org/apache/solr/handler/admin/MetricsHistoryHandler.java b/solr/core/src/java/org/apache/solr/handler/admin/MetricsHistoryHandler.java
index 5c475a1..607fb8b 100644
--- a/solr/core/src/java/org/apache/solr/handler/admin/MetricsHistoryHandler.java
+++ b/solr/core/src/java/org/apache/solr/handler/admin/MetricsHistoryHandler.java
@@ -60,7 +60,6 @@ import org.apache.solr.client.solrj.SolrQuery;
 import org.apache.solr.client.solrj.SolrRequest;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
 import org.apache.solr.client.solrj.cloud.autoscaling.VersionedData;
 import org.apache.solr.client.solrj.impl.HttpClientUtil;
@@ -488,7 +487,7 @@ public class MetricsHistoryHandler extends RequestHandlerBase implements Permiss
         return;
       }
       // add core-level stats
-      Map<String, Map<String, List<ReplicaInfo>>> infos = nodeStateProvider.getReplicaInfo(node, collTags);
+      Map<String, Map<String, List<Replica>>> infos = nodeStateProvider.getReplicaInfo(node, collTags);
       infos.forEach((coll, shards) -> {
         shards.forEach((sh, replicas) -> {
           String registry = SolrMetricManager.getRegistryName(Group.collection, coll);
@@ -497,7 +496,7 @@ public class MetricsHistoryHandler extends RequestHandlerBase implements Permiss
               .computeIfAbsent(registry, r -> new HashMap<>());
           replicas.forEach(ri -> {
             collTags.forEach(tag -> {
-              double value = ((Number)ri.getVariable(tag, 0.0)).doubleValue();
+              double value = ((Number)ri.get(tag, 0.0)).doubleValue();
               DoubleAdder adder = (DoubleAdder)perReg.computeIfAbsent(tag, t -> new DoubleAdder());
               adder.add(value);
             });
diff --git a/solr/core/src/java/org/apache/solr/util/SolrCLI.java b/solr/core/src/java/org/apache/solr/util/SolrCLI.java
index aa68726..922fe63 100755
--- a/solr/core/src/java/org/apache/solr/util/SolrCLI.java
+++ b/solr/core/src/java/org/apache/solr/util/SolrCLI.java
@@ -100,7 +100,6 @@ import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
 import org.apache.solr.client.solrj.cloud.autoscaling.PolicyHelper;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable;
 import org.apache.solr.client.solrj.impl.CloudSolrClient;
@@ -1171,14 +1170,14 @@ public class SolrCLI implements CLIO {
           }
           Map<String, Object> paramsMap = new LinkedHashMap<>();
           params.toMap(paramsMap);
-          ReplicaInfo info = simCloudManager.getSimClusterStateProvider().simGetReplicaInfo(
+          Replica info = simCloudManager.getSimClusterStateProvider().simGetReplicaInfo(
               params.get(CollectionAdminParams.COLLECTION), params.get("replica"));
           if (info == null) {
             CLIO.err("Could not find ReplicaInfo for params: " + params);
           } else if (verbose) {
             paramsMap.put("replicaInfo", info);
-          } else if (info.getVariable(Variable.Type.CORE_IDX.tagName) != null) {
-            paramsMap.put(Variable.Type.CORE_IDX.tagName, info.getVariable(Variable.Type.CORE_IDX.tagName));
+          } else if (info.get(Variable.Type.CORE_IDX.tagName) != null) {
+            paramsMap.put(Variable.Type.CORE_IDX.tagName, info.get(Variable.Type.CORE_IDX.tagName));
           }
           if (withSuggestions) {
             perStepOps.add(paramsMap);
diff --git a/solr/core/src/test/org/apache/solr/cloud/DistribDocExpirationUpdateProcessorTest.java b/solr/core/src/test/org/apache/solr/cloud/DistribDocExpirationUpdateProcessorTest.java
index d9a1a09..027af11 100644
--- a/solr/core/src/test/org/apache/solr/cloud/DistribDocExpirationUpdateProcessorTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/DistribDocExpirationUpdateProcessorTest.java
@@ -232,7 +232,7 @@ public class DistribDocExpirationUpdateProcessorTest extends SolrCloudTestCase {
       boolean firstReplica = true;
       for (Replica replica : shard) {
         coresCompared++;
-        assertEquals(shard.getName(), replica.getSlice()); // sanity check
+        assertEquals(shard.getName(), replica.getShard()); // sanity check
         final String core = replica.getCoreName();
         final ReplicaData initData = initReplicaData.get(core);
         final ReplicaData finalData = finalReplicaData.get(core);
@@ -301,7 +301,7 @@ public class DistribDocExpirationUpdateProcessorTest extends SolrCloudTestCase {
                                   "rows", "0",
                                   "_trace", "counting_docs"))).process(client).getResults().getNumFound();
 
-        final ReplicaData data = new ReplicaData(replica.getSlice(),coreName,(Long)version,numDocs);
+        final ReplicaData data = new ReplicaData(replica.getShard(),coreName,(Long)version,numDocs);
         log.info("{}", data);
         results.put(coreName, data);
 
diff --git a/solr/core/src/test/org/apache/solr/cloud/HttpPartitionTest.java b/solr/core/src/test/org/apache/solr/cloud/HttpPartitionTest.java
index 6ca5533..824845c 100644
--- a/solr/core/src/test/org/apache/solr/cloud/HttpPartitionTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/HttpPartitionTest.java
@@ -582,7 +582,7 @@ public class HttpPartitionTest extends AbstractFullDistribZkTestBase {
   }
 
   protected int getReplicaPort(Replica replica) {
-    String replicaNode = replica.getNodeName();    
+    String replicaNode = replica.getNodeName();
     String tmp = replicaNode.substring(replicaNode.indexOf(':')+1);
     if (tmp.indexOf('_') != -1)
       tmp = tmp.substring(0,tmp.indexOf('_'));
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/ComputePlanActionTest.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/ComputePlanActionTest.java
index 44e4c73..325b1cf 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/ComputePlanActionTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/ComputePlanActionTest.java
@@ -21,7 +21,6 @@ import org.apache.lucene.util.LuceneTestCase;
 import org.apache.solr.client.solrj.SolrRequest;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventType;
 import org.apache.solr.client.solrj.embedded.JettySolrRunner;
 import org.apache.solr.client.solrj.impl.CloudSolrClient;
@@ -540,7 +539,7 @@ public class ComputePlanActionTest extends SolrCloudTestCase {
     NodeStateProvider stateProvider = cloudManager.getNodeStateProvider();
     List<String> nodes = new ArrayList<>();
     cloudManager.getClusterStateProvider().getLiveNodes().forEach(n -> {
-      Map<String, Map<String, List<ReplicaInfo>>> map = stateProvider.getReplicaInfo(n, ImplicitSnitch.tags);
+      Map<String, Map<String, List<Replica>>> map = stateProvider.getReplicaInfo(n, ImplicitSnitch.tags);
       if (map.containsKey("testSelected3") && map.containsKey("testSelected2") && map.containsKey("testSelected1")) {
         nodes.add(n);
       }
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerIntegrationTest.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerIntegrationTest.java
index 15ab701..109f698 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerIntegrationTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerIntegrationTest.java
@@ -31,7 +31,6 @@ import com.google.common.util.concurrent.AtomicDouble;
 import org.apache.lucene.util.LuceneTestCase;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventProcessorStage;
 import org.apache.solr.client.solrj.impl.CloudSolrClient;
 import org.apache.solr.client.solrj.request.CollectionAdminRequest;
@@ -243,13 +242,13 @@ public class SearchRateTriggerIntegrationTest extends SolrCloudTestCase {
     assertNotNull("nodeRates", nodeRates);
     // no node violations because node rates weren't set in the config
     assertTrue(nodeRates.toString(), nodeRates.isEmpty());
-    List<ReplicaInfo> replicaRates = (List<ReplicaInfo>) ev.event.getProperties().get(SearchRateTrigger.HOT_REPLICAS);
+    List<Replica> replicaRates = (List<Replica>) ev.event.getProperties().get(SearchRateTrigger.HOT_REPLICAS);
     assertNotNull("replicaRates", replicaRates);
     assertTrue(replicaRates.toString(), replicaRates.size() > 0);
     AtomicDouble totalReplicaRate = new AtomicDouble();
     replicaRates.forEach(r -> {
-      assertTrue(r.toString(), r.getVariable("rate") != null);
-      totalReplicaRate.addAndGet((Double) r.getVariable("rate"));
+      assertTrue(r.toString(), r.get("rate") != null);
+      totalReplicaRate.addAndGet((Double) r.get("rate"));
     });
     Map<String, Object> shardRates = (Map<String, Object>) ev.event.getProperties().get(SearchRateTrigger.HOT_SHARDS);
     assertNotNull("shardRates", shardRates);
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerTest.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerTest.java
index 6e3f15d..3b35f7e 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/SearchRateTriggerTest.java
@@ -30,7 +30,6 @@ import com.codahale.metrics.MetricRegistry;
 import com.google.common.util.concurrent.AtomicDouble;
 
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventType;
 import org.apache.solr.client.solrj.embedded.JettySolrRunner;
@@ -42,6 +41,7 @@ import org.apache.solr.client.solrj.request.CollectionAdminRequest;
 import org.apache.solr.cloud.CloudUtil;
 import org.apache.solr.cloud.SolrCloudTestCase;
 import org.apache.solr.cloud.ZkDistributedQueueFactory;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.SolrZkClient;
 import org.apache.solr.common.params.AutoScalingParams;
 import org.apache.solr.common.params.CollectionParams;
@@ -145,11 +145,11 @@ public class SearchRateTriggerTest extends SolrCloudTestCase {
         assertEquals(1, events.size());
         TriggerEvent event = events.get(0);
         assertEquals(TriggerEventType.SEARCHRATE, event.eventType);
-        List<ReplicaInfo> infos = (List<ReplicaInfo>)event.getProperty(SearchRateTrigger.HOT_REPLICAS);
+        List<Replica> infos = (List<Replica>)event.getProperty(SearchRateTrigger.HOT_REPLICAS);
         assertEquals(1, infos.size());
-        ReplicaInfo info = infos.get(0);
-        assertEquals(coreName, info.getCore());
-        assertTrue((Double)info.getVariable(AutoScalingParams.RATE) > rate);
+        Replica info = infos.get(0);
+        assertEquals(coreName, info.getCoreName());
+        assertTrue((Double)info.get(AutoScalingParams.RATE) > rate);
       }
       // close that jetty to remove the violation - alternatively wait for 1 min...
       JettySolrRunner j = cluster.stopJettySolrRunner(1);
@@ -263,11 +263,11 @@ public class SearchRateTriggerTest extends SolrCloudTestCase {
       TriggerEvent event = events.get(0);
       assertEquals(event.toString(), TriggerEventType.SEARCHRATE, event.eventType);
       Map<String, Object> hotNodes, hotCollections, hotShards;
-      List<ReplicaInfo> hotReplicas;
+      List<Replica> hotReplicas;
       hotNodes = (Map<String, Object>)event.properties.get(SearchRateTrigger.HOT_NODES);
       hotCollections = (Map<String, Object>)event.properties.get(SearchRateTrigger.HOT_COLLECTIONS);
       hotShards = (Map<String, Object>)event.properties.get(SearchRateTrigger.HOT_SHARDS);
-      hotReplicas = (List<ReplicaInfo>)event.properties.get(SearchRateTrigger.HOT_REPLICAS);
+      hotReplicas = (List<Replica>)event.properties.get(SearchRateTrigger.HOT_REPLICAS);
       assertTrue("no hot nodes?", hotNodes.isEmpty());
       assertFalse("no hot collections?", hotCollections.isEmpty());
       assertFalse("no hot shards?", hotShards.isEmpty());
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/TestPolicyCloud.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/TestPolicyCloud.java
index e715d85..eaca650 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/TestPolicyCloud.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/TestPolicyCloud.java
@@ -36,7 +36,6 @@ import org.apache.solr.client.solrj.cloud.DistributedQueueFactory;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Row;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable.Type;
 import org.apache.solr.client.solrj.embedded.JettySolrRunner;
@@ -157,9 +156,9 @@ public class TestPolicyCloud extends SolrCloudTestCase {
     try (SolrCloudManager cloudManager = new SolrClientCloudManager(new ZkDistributedQueueFactory(cluster.getZkClient()), cluster.getSolrClient())) {
       String nodeName = cloudManager.getClusterStateProvider().getLiveNodes().iterator().next();
       SolrClientNodeStateProvider nodeStateProvider = (SolrClientNodeStateProvider) cloudManager.getNodeStateProvider();
-      Map<String, Map<String, List<ReplicaInfo>>> result = nodeStateProvider.getReplicaInfo(nodeName, Collections.singleton("UPDATE./update.requests"));
+      Map<String, Map<String, List<Replica>>> result = nodeStateProvider.getReplicaInfo(nodeName, Collections.singleton("UPDATE./update.requests"));
       nodeStateProvider.forEachReplica(nodeName, replicaInfo -> {
-        if (replicaInfo.getVariables().containsKey("UPDATE./update.requests")) count.incrementAndGet();
+        if (replicaInfo.getProperties().containsKey("UPDATE./update.requests")) count.incrementAndGet();
       });
       assertTrue(count.get() > 0);
 
@@ -177,8 +176,8 @@ public class TestPolicyCloud extends SolrCloudTestCase {
       count .set(0);
       for (Row row : session.getSortedNodes()) {
         row.collectionVsShardVsReplicas.forEach((c, shardVsReplicas) -> shardVsReplicas.forEach((s, replicaInfos) -> {
-          for (ReplicaInfo replicaInfo : replicaInfos) {
-            if (replicaInfo.getVariables().containsKey(Type.CORE_IDX.tagName)) count.incrementAndGet();
+          for (Replica replicaInfo : replicaInfos) {
+            if (replicaInfo.getProperties().containsKey(Type.CORE_IDX.tagName)) count.incrementAndGet();
           }
         }));
       }
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/SimSolrCloudTestCase.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/SimSolrCloudTestCase.java
index 3d2e314..6918018 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/SimSolrCloudTestCase.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/SimSolrCloudTestCase.java
@@ -33,7 +33,6 @@ import java.util.stream.Collectors;
 
 import org.apache.solr.SolrTestCaseJ4;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.cloud.CloudTestUtils;
 import org.apache.solr.common.cloud.ClusterState;
 import org.apache.solr.common.cloud.DocCollection;
@@ -226,15 +225,15 @@ public class SimSolrCloudTestCase extends SolrTestCaseJ4 {
   }
 
   @SuppressWarnings({"unchecked"})
-  public static void assertReplicaInfoEquals(ReplicaInfo one, ReplicaInfo two) {
+  public static void assertReplicaInfoEquals(Replica one, Replica two) {
     assertEquals(one.getName(), two.getName());
-    assertEquals(one.getNode(), two.getNode());
+    assertEquals(one.getNodeName(), two.getNodeName());
     assertEquals(one.getState(), two.getState());
     assertEquals(one.getType(), two.getType());
-    assertEquals(one.getCore(), two.getCore());
+    assertEquals(one.getCoreName(), two.getCoreName());
     assertEquals(one.getCollection(), two.getCollection());
     assertEquals(one.getShard(), two.getShard());
-    assertEquals(one.isLeader, two.isLeader);
+    assertEquals(one.isLeader(), two.isLeader());
     Map<String, Object> oneMap = new HashMap<>();
     Map<String, Object> twoMap = new HashMap<>();
     one.toMap(oneMap);
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimClusterStateProvider.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimClusterStateProvider.java
index abb75cc..2c82d0c 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimClusterStateProvider.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimClusterStateProvider.java
@@ -29,7 +29,6 @@ import java.util.concurrent.TimeUnit;
 
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Preference;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.embedded.JettySolrRunner;
 import org.apache.solr.client.solrj.request.CollectionAdminRequest;
@@ -64,7 +63,7 @@ public class TestSimClusterStateProvider extends SolrCloudTestCase {
   private static Collection<String> liveNodes;
   private static Map<String, Object> clusterProperties;
   private static AutoScalingConfig autoScalingConfig;
-  private static Map<String, Map<String, Map<String, List<ReplicaInfo>>>> replicas;
+  private static Map<String, Map<String, Map<String, List<Replica>>>> replicas;
   private static Map<String, Map<String, Object>> nodeValues;
   private static ClusterState realState;
 
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimPolicyCloud.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimPolicyCloud.java
index 11c388c..011ef3a 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimPolicyCloud.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimPolicyCloud.java
@@ -32,7 +32,6 @@ import org.apache.solr.client.solrj.SolrRequest;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
 import org.apache.solr.client.solrj.cloud.autoscaling.Policy;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Row;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable.Type;
 import org.apache.solr.client.solrj.request.CollectionAdminRequest;
@@ -105,8 +104,8 @@ public class TestSimPolicyCloud extends SimSolrCloudTestCase {
     AtomicInteger count = new AtomicInteger(0);
     for (Row row : session.getSortedNodes()) {
       row.collectionVsShardVsReplicas.forEach((c, shardVsReplicas) -> shardVsReplicas.forEach((s, replicaInfos) -> {
-        for (ReplicaInfo replicaInfo : replicaInfos) {
-          if (replicaInfo.getVariables().containsKey(Type.CORE_IDX.tagName)) count.incrementAndGet();
+        for (Replica replicaInfo : replicaInfos) {
+          if (replicaInfo.getProperties().containsKey(Type.CORE_IDX.tagName)) count.incrementAndGet();
         }
       }));
     }
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimTriggerIntegration.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimTriggerIntegration.java
index a49a739..c7b6153 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimTriggerIntegration.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSimTriggerIntegration.java
@@ -38,7 +38,6 @@ import java.util.concurrent.locks.ReentrantLock;
 import org.apache.solr.client.solrj.SolrClient;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventProcessorStage;
 import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventType;
 import org.apache.solr.client.solrj.request.CollectionAdminRequest;
@@ -61,6 +60,7 @@ import org.apache.solr.cloud.autoscaling.TriggerListenerBase;
 import org.apache.solr.cloud.autoscaling.TriggerValidationException;
 import org.apache.solr.common.MapWriter;
 import org.apache.solr.common.cloud.LiveNodesListener;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.ZkStateReader;
 import org.apache.solr.common.util.TimeSource;
 import org.apache.solr.common.util.Utils;
@@ -1467,13 +1467,13 @@ public class TestSimTriggerIntegration extends SimSolrCloudTestCase {
     assertTrue(nodeRates.toString(), nodeRates.size() > 0);
     AtomicDouble totalNodeRate = new AtomicDouble();
     nodeRates.forEach((n, r) -> totalNodeRate.addAndGet(r));
-    List<ReplicaInfo> replicaRates = (List<ReplicaInfo>)ev.event.getProperties().get(SearchRateTrigger.HOT_REPLICAS);
+    List<Replica> replicaRates = (List<Replica>)ev.event.getProperties().get(SearchRateTrigger.HOT_REPLICAS);
     assertNotNull("replicaRates", replicaRates);
     assertTrue(replicaRates.toString(), replicaRates.size() > 0);
     AtomicDouble totalReplicaRate = new AtomicDouble();
     replicaRates.forEach(r -> {
-      assertTrue(r.toString(), r.getVariable("rate") != null);
-      totalReplicaRate.addAndGet((Double)r.getVariable("rate"));
+      assertTrue(r.toString(), r.get("rate") != null);
+      totalReplicaRate.addAndGet((Double)r.get("rate"));
     });
     Map<String, Object> shardRates = (Map<String, Object>)ev.event.getProperties().get(SearchRateTrigger.HOT_SHARDS);
     assertNotNull("shardRates", shardRates);
diff --git a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSnapshotCloudManager.java b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSnapshotCloudManager.java
index 81d2f8f..5b5e0c8 100644
--- a/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSnapshotCloudManager.java
+++ b/solr/core/src/test/org/apache/solr/cloud/autoscaling/sim/TestSnapshotCloudManager.java
@@ -40,7 +40,6 @@ import org.apache.solr.client.solrj.cloud.DistribStateManager;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.client.solrj.cloud.autoscaling.PolicyHelper;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester;
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggestion;
 import org.apache.solr.client.solrj.cloud.autoscaling.VersionedData;
@@ -202,22 +201,22 @@ public class TestSnapshotCloudManager extends SolrCloudTestCase {
         }
       }
       assertEquals(Utils.toJSONString(oneVals), Utils.toJSONString(twoVals));
-      Map<String, Map<String, List<ReplicaInfo>>> oneInfos = one.getReplicaInfo(node, SimUtils.COMMON_REPLICA_TAGS);
-      Map<String, Map<String, List<ReplicaInfo>>> twoInfos = two.getReplicaInfo(node, SimUtils.COMMON_REPLICA_TAGS);
+      Map<String, Map<String, List<Replica>>> oneInfos = one.getReplicaInfo(node, SimUtils.COMMON_REPLICA_TAGS);
+      Map<String, Map<String, List<Replica>>> twoInfos = two.getReplicaInfo(node, SimUtils.COMMON_REPLICA_TAGS);
       assertEquals("collections on node" + node, oneInfos.keySet(), twoInfos.keySet());
       oneInfos.forEach((coll, oneShards) -> {
-        Map<String, List<ReplicaInfo>> twoShards = twoInfos.get(coll);
+        Map<String, List<Replica>> twoShards = twoInfos.get(coll);
         assertEquals("shards on node " + node, oneShards.keySet(), twoShards.keySet());
         oneShards.forEach((shard, oneReplicas) -> {
-          List<ReplicaInfo> twoReplicas = twoShards.get(shard);
+          List<Replica> twoReplicas = twoShards.get(shard);
           assertEquals("num replicas on node " + node, oneReplicas.size(), twoReplicas.size());
-          Map<String, ReplicaInfo> oneMap = oneReplicas.stream()
-              .collect(Collectors.toMap(ReplicaInfo::getName, Function.identity()));
-          Map<String, ReplicaInfo> twoMap = twoReplicas.stream()
-              .collect(Collectors.toMap(ReplicaInfo::getName, Function.identity()));
+          Map<String, Replica> oneMap = oneReplicas.stream()
+              .collect(Collectors.toMap(Replica::getName, Function.identity()));
+          Map<String, Replica> twoMap = twoReplicas.stream()
+              .collect(Collectors.toMap(Replica::getName, Function.identity()));
           assertEquals("replica coreNodeNames on node " + node, oneMap.keySet(), twoMap.keySet());
           oneMap.forEach((coreNode, oneReplica) -> {
-            ReplicaInfo twoReplica = twoMap.get(coreNode);
+            Replica twoReplica = twoMap.get(coreNode);
             SimSolrCloudTestCase.assertReplicaInfoEquals(oneReplica, twoReplica);
           });
         });
diff --git a/solr/core/src/test/org/apache/solr/cloud/rule/RuleEngineTest.java b/solr/core/src/test/org/apache/solr/cloud/rule/RuleEngineTest.java
index 02cc477..ac708b4 100644
--- a/solr/core/src/test/org/apache/solr/cloud/rule/RuleEngineTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/rule/RuleEngineTest.java
@@ -31,8 +31,8 @@ import com.google.common.collect.ImmutableList;
 import org.apache.solr.SolrTestCaseJ4;
 import org.apache.solr.client.solrj.cloud.autoscaling.DelegatingCloudManager;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.ReplicaPosition;
 import org.apache.solr.common.cloud.ZkStateReader;
 import org.apache.solr.common.cloud.rule.Snitch;
@@ -212,7 +212,7 @@ public class RuleEngineTest extends SolrTestCaseJ4{
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             return null;
           }
         };
diff --git a/solr/core/src/test/org/apache/solr/core/CoreSorterTest.java b/solr/core/src/test/org/apache/solr/core/CoreSorterTest.java
index f584604..7757606 100644
--- a/solr/core/src/test/org/apache/solr/core/CoreSorterTest.java
+++ b/solr/core/src/test/org/apache/solr/core/CoreSorterTest.java
@@ -185,7 +185,7 @@ public class CoreSorterTest extends SolrTestCaseJ4 {
   private CoreDescriptor newCoreDescriptor(Replica r) {
     @SuppressWarnings({"unchecked"})
     Map<String,String> props = map(
-        CoreDescriptor.CORE_SHARD, r.getSlice(),
+        CoreDescriptor.CORE_SHARD, r.getShard(),
         CoreDescriptor.CORE_COLLECTION, r.getCollection(),
         CoreDescriptor.CORE_NODE_NAME, r.getNodeName()
     );
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/NodeStateProvider.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/NodeStateProvider.java
index 0f5f1e5..edf40b7 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/NodeStateProvider.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/NodeStateProvider.java
@@ -20,8 +20,8 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.common.SolrCloseable;
+import org.apache.solr.common.cloud.Replica;
 
 /**
  * This interface models the access to node and replica information.
@@ -40,6 +40,7 @@ public interface NodeStateProvider extends SolrCloseable {
    * Get the details of each replica in a node. It attempts to fetch as much details about
    * the replica as mentioned in the keys list. It is not necessary to give all details
    * <p>The format is {collection:shard :[{replicadetails}]}.</p>
+   * @return map of replica infos per collection/shard
    */
-  Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys);
+  Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys);
 }
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Clause.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Clause.java
index b5c956a..06f49e6 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Clause.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Clause.java
@@ -700,7 +700,7 @@ public class Clause implements MapWriter, Comparable<Clause> {
   }
 
 
-  public boolean isMatch(ReplicaInfo r, String collection, String shard) {
+  public boolean isMatch(Replica r, String collection, String shard) {
     if (type != null && r.getType() != type) return false;
     if (r.getCollection().equals(collection)) {
       if (this.shard == null || this.shard.val.equals(Policy.ANY)) return true;
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/CoresVariable.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/CoresVariable.java
index a468385..2e2c911 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/CoresVariable.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/CoresVariable.java
@@ -21,6 +21,8 @@ import java.util.Collection;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
 
+import org.apache.solr.common.cloud.Replica;
+
 import static org.apache.solr.common.params.CollectionParams.CollectionAction.MOVEREPLICA;
 
 public class CoresVariable extends VariableBase {
@@ -59,12 +61,12 @@ public class CoresVariable extends VariableBase {
   }
 
   @Override
-  public void projectAddReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> ops, boolean strictMode) {
+  public void projectAddReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> ops, boolean strictMode) {
     cell.val = cell.val == null ? 0 : ((Number) cell.val).doubleValue() + 1;
   }
 
   @Override
-  public void projectRemoveReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector) {
+  public void projectRemoveReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector) {
     cell.val = cell.val == null ? 0 : ((Number) cell.val).doubleValue() - 1;
   }
 
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/DelegatingNodeStateProvider.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/DelegatingNodeStateProvider.java
index 72b2819..2a30d37 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/DelegatingNodeStateProvider.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/DelegatingNodeStateProvider.java
@@ -23,6 +23,7 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
+import org.apache.solr.common.cloud.Replica;
 
 /**
  * Base class for overriding some behavior of {@link NodeStateProvider}.
@@ -40,7 +41,7 @@ public class DelegatingNodeStateProvider implements NodeStateProvider {
   }
 
   @Override
-  public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+  public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
     return delegate.getReplicaInfo(node, keys);
   }
 
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/FreeDiskVariable.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/FreeDiskVariable.java
index 2193ea3..f9e647d 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/FreeDiskVariable.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/FreeDiskVariable.java
@@ -26,6 +26,7 @@ import java.util.function.Consumer;
 import java.util.stream.Collectors;
 
 import org.apache.solr.client.solrj.cloud.autoscaling.Suggester.Hint;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.util.Pair;
 
 import static org.apache.solr.client.solrj.cloud.autoscaling.Suggestion.suggestNegativeViolations;
@@ -90,31 +91,31 @@ public class FreeDiskVariable extends VariableBase {
       List<Row> matchingNodes = ctx.session.matrix.stream().filter(
           row -> ctx.violation.getViolatingReplicas()
               .stream()
-              .anyMatch(p -> row.node.equals(p.replicaInfo.getNode())))
+              .anyMatch(p -> row.node.equals(p.replicaInfo.getNodeName())))
           .sorted(Comparator.comparing(r -> ((Double) r.getVal(DISK, 0d))))
           .collect(Collectors.toList());
 
 
       for (Row node : matchingNodes) {
         //lets try to start moving the smallest cores off of the node
-        ArrayList<ReplicaInfo> replicas = new ArrayList<>();
+        ArrayList<Replica> replicas = new ArrayList<>();
         node.forEachReplica(replicas::add);
         replicas.sort((r1, r2) -> {
-          Long s1 = Clause.parseLong(CORE_IDX.tagName, r1.getVariables().get(CORE_IDX.tagName));
-          Long s2 = Clause.parseLong(CORE_IDX.tagName, r2.getVariables().get(CORE_IDX.tagName));
+          Long s1 = Clause.parseLong(CORE_IDX.tagName, r1.getProperties().get(CORE_IDX.tagName));
+          Long s2 = Clause.parseLong(CORE_IDX.tagName, r2.getProperties().get(CORE_IDX.tagName));
           if (s1 != null && s2 != null) return s1.compareTo(s2);
           return 0;
         });
         double currentDelta = ctx.violation.getClause().tag.delta(node.getVal(DISK));
-        for (ReplicaInfo replica : replicas) {
+        for (Replica replica : replicas) {
           if (currentDelta < 1) break;
-          if (replica.getVariables().get(CORE_IDX.tagName) == null) continue;
+          if (replica.getProperties().get(CORE_IDX.tagName) == null) continue;
           Suggester suggester = ctx.session.getSuggester(MOVEREPLICA)
               .hint(Hint.COLL_SHARD, new Pair<>(replica.getCollection(), replica.getShard()))
               .hint(Hint.SRC_NODE, node.node)
               .forceOperation(true);
           ctx.addSuggestion(suggester);
-          currentDelta -= Clause.parseLong(CORE_IDX.tagName, replica.getVariable(CORE_IDX.tagName));
+          currentDelta -= Clause.parseLong(CORE_IDX.tagName, replica.get(CORE_IDX.tagName));
         }
       }
     } else if (ctx.violation.replicaCountDelta < 0) {
@@ -131,7 +132,7 @@ public class FreeDiskVariable extends VariableBase {
             node.forEachShard(coll, (s, ri) -> {
               if (result.get() != null) return;
               if (s.equals(shard1) && ri.size() > 0) {
-                Number sz = ((Number) ri.get(0).getVariable(CORE_IDX.tagName));
+                Number sz = ((Number) ri.get(0).get(CORE_IDX.tagName));
                 if (sz != null) result.set(new Pair<>(shard1, sz.longValue()));
               }
             });
@@ -146,28 +147,28 @@ public class FreeDiskVariable extends VariableBase {
 
   //When a replica is added, freedisk should be incremented
   @Override
-  public void projectAddReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> ops, boolean strictMode) {
+  public void projectAddReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> ops, boolean strictMode) {
     //go through other replicas of this shard and copy the index size value into this
     for (Row row : cell.getRow().session.matrix) {
       row.forEachReplica(replicaInfo -> {
         if (ri != replicaInfo &&
             ri.getCollection().equals(replicaInfo.getCollection()) &&
             ri.getShard().equals(replicaInfo.getShard()) &&
-            ri.getVariable(CORE_IDX.tagName) == null &&
-            replicaInfo.getVariable(CORE_IDX.tagName) != null) {
-          ri.getVariables().put(CORE_IDX.tagName, validate(CORE_IDX.tagName, replicaInfo.getVariable(CORE_IDX.tagName), false));
+            ri.get(CORE_IDX.tagName) == null &&
+            replicaInfo.get(CORE_IDX.tagName) != null) {
+          ri.getProperties().put(CORE_IDX.tagName, validate(CORE_IDX.tagName, replicaInfo.get(CORE_IDX.tagName), false));
         }
       });
     }
-    Double idxSize = (Double) validate(CORE_IDX.tagName, ri.getVariable(CORE_IDX.tagName), false);
+    Double idxSize = (Double) validate(CORE_IDX.tagName, ri.get(CORE_IDX.tagName), false);
     if (idxSize == null) return;
     Double currFreeDisk = cell.val == null ? 0.0d : (Double) cell.val;
     cell.val = currFreeDisk - idxSize;
   }
 
   @Override
-  public void projectRemoveReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector) {
-    Double idxSize = (Double) validate(CORE_IDX.tagName, ri.getVariable(CORE_IDX.tagName), false);
+  public void projectRemoveReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector) {
+    Double idxSize = (Double) validate(CORE_IDX.tagName, ri.get(CORE_IDX.tagName), false);
     if (idxSize == null) return;
     Double currFreeDisk = cell.val == null ? 0.0d : (Double) cell.val;
     cell.val = currFreeDisk + idxSize;
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggester.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggester.java
index 49be0e3..f88d9d4 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggester.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggester.java
@@ -23,6 +23,7 @@ import java.util.List;
 
 import org.apache.solr.client.solrj.SolrRequest;
 import org.apache.solr.client.solrj.request.CollectionAdminRequest;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.params.CollectionParams;
 import org.apache.solr.common.util.Pair;
 import org.slf4j.Logger;
@@ -47,14 +48,14 @@ public class MoveReplicaSuggester extends Suggester {
     List<Violation> leastSeriousViolation = null;
     Row bestSrcRow = null;
     Row bestTargetRow = null;
-    ReplicaInfo sourceReplicaInfo = null;
-    List<Pair<ReplicaInfo, Row>> validReplicas = getValidReplicas(true, true, -1);
+    Replica sourceReplicaInfo = null;
+    List<Pair<Replica, Row>> validReplicas = getValidReplicas(true, true, -1);
     validReplicas.sort(leaderLast);
     for (int i1 = 0; i1 < validReplicas.size(); i1++) {
       lastBestDeviation = null;
-      Pair<ReplicaInfo, Row> fromReplica = validReplicas.get(i1);
+      Pair<Replica, Row> fromReplica = validReplicas.get(i1);
       Row fromRow = fromReplica.second();
-      ReplicaInfo ri = fromReplica.first();
+      Replica ri = fromReplica.first();
       if (ri == null) continue;
       final int i = session.indexOf(fromRow.node);
       int stopAt = force ? 0 : i;
@@ -97,8 +98,8 @@ public class MoveReplicaSuggester extends Suggester {
     return null;
   }
 
-  static Comparator<Pair<ReplicaInfo, Row>> leaderLast = (r1, r2) -> {
-    int leaderCompare = Boolean.compare(r1.first().isLeader, r2.first().isLeader);
+  static Comparator<Pair<Replica, Row>> leaderLast = (r1, r2) -> {
+    int leaderCompare = Boolean.compare(r1.first().isLeader(), r2.first().isLeader());
     if ( leaderCompare != 0 ) {
       return leaderCompare;
     } else {
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/PolicyHelper.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/PolicyHelper.java
index a1e9fad..3f3a300 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/PolicyHelper.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/PolicyHelper.java
@@ -145,11 +145,11 @@ public class PolicyHelper {
           for (String shardName : shardNames) {
             Replica ldr = coll.getLeader(shardName);
             if (ldr != null && cloudManager.getClusterStateProvider().getLiveNodes().contains(ldr.getNodeName())) {
-              Map<String, Map<String, List<ReplicaInfo>>> details = cloudManager.getNodeStateProvider().getReplicaInfo(ldr.getNodeName(),
+              Map<String, Map<String, List<Replica>>> details = cloudManager.getNodeStateProvider().getReplicaInfo(ldr.getNodeName(),
                   Collections.singleton(FREEDISK.perReplicaValue));
-              ReplicaInfo replicaInfo = details.getOrDefault(collName, emptyMap()).getOrDefault(shardName, singletonList(null)).get(0);
+              Replica replicaInfo = details.getOrDefault(collName, emptyMap()).getOrDefault(shardName, singletonList(null)).get(0);
               if (replicaInfo != null) {
-                Object idxSz = replicaInfo.getVariables().get(FREEDISK.perReplicaValue);
+                Object idxSz = replicaInfo.getProperties().get(FREEDISK.perReplicaValue);
                 if (idxSz != null) {
                   diskSpaceReqd.put(shardName, 1.5 * (Double) Variable.Type.FREEDISK.validate(null, idxSz, false));
                 }
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaCount.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaCount.java
index 642b565..c41e48c 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaCount.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaCount.java
@@ -63,14 +63,14 @@ class ReplicaCount  implements MapWriter {
     return total();
   }
 
-  public void increment(List<ReplicaInfo> infos) {
+  public void increment(List<Replica> infos) {
     if (infos == null) return;
-    for (ReplicaInfo info : infos) {
+    for (Replica info : infos) {
       increment(info);
     }
   }
 
-  void increment(ReplicaInfo info) {
+  void increment(Replica info) {
     increment(info.getType());
   }
 
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaInfo.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaInfo.java
deleted file mode 100644
index 9b1f78c..0000000
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/ReplicaInfo.java
+++ /dev/null
@@ -1,224 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.solr.client.solrj.cloud.autoscaling;
-
-import java.io.IOException;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Objects;
-import java.util.function.BiPredicate;
-
-import org.apache.solr.common.MapWriter;
-import org.apache.solr.common.cloud.Replica;
-import org.apache.solr.common.cloud.ZkStateReader;
-import org.apache.solr.common.util.Utils;
-
-import static org.apache.solr.common.ConditionalMapWriter.NON_NULL_VAL;
-import static org.apache.solr.common.ConditionalMapWriter.dedupeKeyPredicate;
-import static org.apache.solr.common.cloud.ZkStateReader.LEADER_PROP;
-
-public class ReplicaInfo implements MapWriter {
-  private final String name;
-  private final String core, collection, shard;
-  private final Replica.Type type;
-  private final String node;
-  public final boolean isLeader;
-  private final Map<String, Object> variables = new HashMap<>();
-
-  public ReplicaInfo(String coll, String shard, Replica r, Map<String, Object> vals) {
-    this.name = r.getName();
-    this.core = r.getCoreName();
-    this.collection = coll;
-    this.shard = shard;
-    this.type = r.getType();
-    this.node = r.getNodeName();
-    boolean maybeLeader = r.getBool(LEADER_PROP, false);
-    if (vals != null) {
-      this.variables.putAll(vals);
-      maybeLeader = "true".equals(String.valueOf(vals.getOrDefault(LEADER_PROP, maybeLeader)));
-    }
-    this.isLeader = maybeLeader;
-    validate();
-  }
-
-  public ReplicaInfo(String name, String core, String coll, String shard, Replica.Type type, String node, Map<String, Object> vals) {
-    if (vals == null) vals = Collections.emptyMap();
-    this.name = name;
-    if (vals != null) {
-      this.variables.putAll(vals);
-    }
-    this.isLeader = "true".equals(String.valueOf(vals.getOrDefault(LEADER_PROP, "false")));
-    this.collection = coll;
-    this.shard = shard;
-    this.type = type;
-    this.core = core;
-    this.node = node;
-    validate();
-  }
-
-  @SuppressWarnings({"unchecked"})
-  public ReplicaInfo(Map<String, Object> map) {
-    this.name = map.keySet().iterator().next();
-    @SuppressWarnings({"rawtypes"})Map details = (Map) map.get(name);
-    details = Utils.getDeepCopy(details, 4);
-    this.collection = (String) details.remove("collection");
-    this.shard = (String) details.remove("shard");
-    this.core = (String) details.remove("core");
-    this.node = (String) details.remove("node_name");
-    this.isLeader = Boolean.parseBoolean((String) details.getOrDefault("leader", "false"));
-    details.remove("leader");
-    type = Replica.Type.valueOf((String) details.getOrDefault("type", "NRT"));
-    details.remove("type");
-    this.variables.putAll(details);
-    validate();
-  }
-
-  private final void validate() {
-    Objects.requireNonNull(this.name, "'name' must not be null");
-    Objects.requireNonNull(this.core, "'core' must not be null");
-    Objects.requireNonNull(this.collection, "'collection' must not be null");
-    Objects.requireNonNull(this.shard, "'shard' must not be null");
-    Objects.requireNonNull(this.type, "'type' must not be null");
-    Objects.requireNonNull(this.node, "'node' must not be null");
-  }
-
-  public Object clone() {
-    return new ReplicaInfo(name, core, collection, shard, type, node, new HashMap<>(variables));
-  }
-
-  @Override
-  public void writeMap(EntryWriter ew) throws IOException {
-    BiPredicate<CharSequence, Object> p = dedupeKeyPredicate(new HashSet<>())
-        .and(NON_NULL_VAL);
-    ew.put(name, (MapWriter) ew1 -> {
-      ew1.put(ZkStateReader.CORE_NAME_PROP, core, p)
-          .put(ZkStateReader.SHARD_ID_PROP, shard, p)
-          .put(ZkStateReader.COLLECTION_PROP, collection, p)
-          .put(ZkStateReader.NODE_NAME_PROP, node, p)
-          .put(ZkStateReader.REPLICA_TYPE, type.toString(), p);
-      for (Map.Entry<String, Object> e : variables.entrySet()) ew1.put(e.getKey(), e.getValue(), p);
-    });
-  }
-
-  /** Replica "coreNode" name. */
-  public String getName() {
-    return name;
-  }
-
-  /** SolrCore name. */
-  public String getCore() {
-    return core;
-  }
-
-  public String getCollection() {
-    return collection;
-  }
-
-  public String getShard() {
-    return shard;
-  }
-
-  public Replica.Type getType() {
-    Object o = type == null ? variables.get(ZkStateReader.REPLICA_TYPE) : type;
-    if (o == null) {
-      return Replica.Type.NRT;
-    } else if (o instanceof Replica.Type) {
-      return (Replica.Type)o;
-    } else {
-      Replica.Type type = Replica.Type.get(String.valueOf(o).toUpperCase(Locale.ROOT));
-      return type;
-    }
-  }
-
-  public Replica.State getState() {
-    if (variables.get(ZkStateReader.STATE_PROP) != null) {
-      return Replica.State.getState((String) variables.get(ZkStateReader.STATE_PROP));
-    } else {
-      // default to ACTIVE
-      variables.put(ZkStateReader.STATE_PROP, Replica.State.ACTIVE.toString());
-      return Replica.State.ACTIVE;
-    }
-  }
-
-  public Map<String, Object> getVariables() {
-    return variables;
-  }
-
-  public Object getVariable(String name) {
-    return variables.get(name);
-  }
-
-  public Object getVariable(String name, Object defValue) {
-    Object o = variables.get(name);
-    if (o != null) {
-      return o;
-    } else {
-      return defValue;
-    }
-  }
-
-  public boolean getBool(String name, boolean defValue) {
-    Object o = getVariable(name, defValue);
-    if (o instanceof Boolean) {
-      return (Boolean)o;
-    } else {
-      return Boolean.parseBoolean(String.valueOf(o));
-    }
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (o == null) {
-      return false;
-    }
-    if (!(o instanceof ReplicaInfo)) {
-      return false;
-    }
-    ReplicaInfo other = (ReplicaInfo)o;
-    if (
-        name.equals(other.name) &&
-        collection.equals(other.collection) &&
-        core.equals(other.core) &&
-        isLeader == other.isLeader &&
-        node.equals(other.node) &&
-        shard.equals(other.shard) &&
-        type == other.type &&
-        variables.equals(other.variables)) {
-      return true;
-    } else {
-      return false;
-    }
-  }
-
-  @Override
-  public int hashCode() {
-    return Objects.hash(name, core, collection, shard, type);
-  }
-
-  @Override
-  public String toString() {
-    return Utils.toJSONString(this);
-  }
-
-  public String getNode() {
-    return node;
-  }
-}
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Row.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Row.java
index e2b6a55..3010acc 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Row.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Row.java
@@ -38,7 +38,6 @@ import org.apache.solr.client.solrj.cloud.NodeStateProvider;
 import org.apache.solr.client.solrj.cloud.SolrCloudManager;
 import org.apache.solr.common.MapWriter;
 import org.apache.solr.common.cloud.Replica;
-import org.apache.solr.common.cloud.ZkStateReader;
 import org.apache.solr.common.util.Pair;
 import org.apache.solr.common.util.Utils;
 import org.slf4j.Logger;
@@ -55,7 +54,7 @@ public class Row implements MapWriter {
   public final String node;
   final Cell[] cells;
   //this holds the details of each replica in the node
-  public Map<String, Map<String, List<ReplicaInfo>>> collectionVsShardVsReplicas;
+  public Map<String, Map<String, List<Replica>>> collectionVsShardVsReplicas;
 
   boolean anyValueMissing = false;
   boolean isLive = true;
@@ -130,7 +129,7 @@ public class Row implements MapWriter {
   }
 
 
-  public void forEachShard(String collection, BiConsumer<String, List<ReplicaInfo>> consumer) {
+  public void forEachShard(String collection, BiConsumer<String, List<Replica>> consumer) {
     collectionVsShardVsReplicas
         .getOrDefault(collection, Collections.emptyMap())
         .forEach(consumer);
@@ -172,7 +171,7 @@ public class Row implements MapWriter {
 
   public Row(String node, Cell[] cells, boolean anyValueMissing,
              @SuppressWarnings({"rawtypes"}) Map<String,
-                     Map<String, List<ReplicaInfo>>> collectionVsShardVsReplicas, boolean isLive, Policy.Session session,
+                     Map<String, List<Replica>>> collectionVsShardVsReplicas, boolean isLive, Policy.Session session,
              @SuppressWarnings({"rawtypes"}) Map perRowCache,
              @SuppressWarnings({"rawtypes"})Map globalCache) {
     this.session = session;
@@ -251,11 +250,11 @@ public class Row implements MapWriter {
     row = session.copy().getNode(this.node);
     if (row == null) throw new RuntimeException("couldn't get a row");
     row.lazyCopyReplicas(coll, shard);
-    Map<String, List<ReplicaInfo>> c = row.collectionVsShardVsReplicas.computeIfAbsent(coll, k -> new HashMap<>());
-    List<ReplicaInfo> replicas = c.computeIfAbsent(shard, k -> new ArrayList<>());
+    Map<String, List<Replica>> c = row.collectionVsShardVsReplicas.computeIfAbsent(coll, k -> new HashMap<>());
+    List<Replica> replicas = c.computeIfAbsent(shard, k -> new ArrayList<>());
     String replicaname = "SYNTHETIC." + new Random().nextInt(1000) + 1000;
-    ReplicaInfo ri = new ReplicaInfo(replicaname, replicaname, coll, shard, type, this.node,
-        Utils.makeMap(ZkStateReader.REPLICA_TYPE, type != null ? type.toString() : Replica.Type.NRT.toString()));
+    Replica ri = new Replica(replicaname, this.node, coll, shard, replicaname,
+        Replica.State.ACTIVE, type != null ? type : Replica.Type.NRT, Collections.emptyMap());
     replicas.add(ri);
     for (Cell cell : row.cells) {
       cell.type.projectAddReplica(cell, ri, opCollector, strictMode);
@@ -281,8 +280,8 @@ public class Row implements MapWriter {
     perCollCache = cacheCopy;
     if (isAlreadyCopied) return;//caches need to be invalidated but the rest can remain as is
 
-    Map<String, Map<String, List<ReplicaInfo>>> replicasCopy = new HashMap<>(collectionVsShardVsReplicas);
-    Map<String, List<ReplicaInfo>> oneColl = replicasCopy.get(coll);
+    Map<String, Map<String, List<Replica>>> replicasCopy = new HashMap<>(collectionVsShardVsReplicas);
+    Map<String, List<Replica>> oneColl = replicasCopy.get(coll);
     if (oneColl != null) {
       replicasCopy.put(coll, Utils.getDeepCopy(oneColl, 2));
     }
@@ -296,7 +295,7 @@ public class Row implements MapWriter {
 
   @SuppressWarnings({"unchecked"})
   public void createCollShard(Pair<String, String> collShard) {
-    Map<String, List<ReplicaInfo>> shardInfo = collectionVsShardVsReplicas.computeIfAbsent(collShard.first(), Utils.NEW_HASHMAP_FUN);
+    Map<String, List<Replica>> shardInfo = collectionVsShardVsReplicas.computeIfAbsent(collShard.first(), Utils.NEW_HASHMAP_FUN);
     if (collShard.second() != null) shardInfo.computeIfAbsent(collShard.second(), Utils.NEW_ARRAYLIST_FUN);
   }
 
@@ -318,14 +317,14 @@ public class Row implements MapWriter {
   }
 
 
-  public ReplicaInfo getReplica(String coll, String shard, Replica.Type type) {
-    Map<String, List<ReplicaInfo>> c = collectionVsShardVsReplicas.get(coll);
+  public Replica getReplica(String coll, String shard, Replica.Type type) {
+    Map<String, List<Replica>> c = collectionVsShardVsReplicas.get(coll);
     if (c == null) return null;
-    List<ReplicaInfo> r = c.get(shard);
+    List<Replica> r = c.get(shard);
     if (r == null) return null;
     int idx = -1;
     for (int i = 0; i < r.size(); i++) {
-      ReplicaInfo info = r.get(i);
+      Replica info = r.get(i);
       if (type == null || info.getType() == type) {
         idx = i;
         break;
@@ -350,20 +349,20 @@ public class Row implements MapWriter {
     Consumer<OperationInfo> opCollector = it -> furtherOps.add(it);
     Row row = session.copy().getNode(this.node);
     row.lazyCopyReplicas(coll, shard);
-    Map<String, List<ReplicaInfo>> c = row.collectionVsShardVsReplicas.get(coll);
+    Map<String, List<Replica>> c = row.collectionVsShardVsReplicas.get(coll);
     if (c == null) return null;
-    List<ReplicaInfo> r = c.get(shard);
+    List<Replica> r = c.get(shard);
     if (r == null) return null;
     int idx = -1;
     for (int i = 0; i < r.size(); i++) {
-      ReplicaInfo info = r.get(i);
+      Replica info = r.get(i);
       if (type == null || info.getType() == type) {
         idx = i;
         break;
       }
     }
     if (idx == -1) return null;
-    ReplicaInfo removed = r.remove(idx);
+    Replica removed = r.remove(idx);
     for (Cell cell : row.cells) {
       cell.type.projectRemoveReplica(cell, removed, opCollector);
     }
@@ -379,23 +378,23 @@ public class Row implements MapWriter {
     return isLive;
   }
 
-  public void forEachReplica(Consumer<ReplicaInfo> consumer) {
+  public void forEachReplica(Consumer<Replica> consumer) {
     forEachReplica(collectionVsShardVsReplicas, consumer);
   }
 
-  public void forEachReplica(String coll, Consumer<ReplicaInfo> consumer) {
+  public void forEachReplica(String coll, Consumer<Replica> consumer) {
     collectionVsShardVsReplicas.getOrDefault(coll, Collections.emptyMap()).forEach((shard, replicaInfos) -> {
-      for (ReplicaInfo replicaInfo : replicaInfos) {
+      for (Replica replicaInfo : replicaInfos) {
         consumer.accept(replicaInfo);
       }
     });
   }
 
-  public static void forEachReplica(Map<String, Map<String, List<ReplicaInfo>>> collectionVsShardVsReplicas, Consumer<ReplicaInfo> consumer) {
+  public static void forEachReplica(Map<String, Map<String, List<Replica>>> collectionVsShardVsReplicas, Consumer<Replica> consumer) {
     collectionVsShardVsReplicas.forEach((coll, shardVsReplicas) -> shardVsReplicas
         .forEach((shard, replicaInfos) -> {
           for (int i = 0; i < replicaInfos.size(); i++) {
-            ReplicaInfo r = replicaInfos.get(i);
+            Replica r = replicaInfos.get(i);
             consumer.accept(r);
           }
         }));
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggester.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggester.java
index b9d5faf..889fedd 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggester.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggester.java
@@ -296,8 +296,8 @@ public abstract class Suggester implements MapWriter {
     return false;
   }
 
-  List<Pair<ReplicaInfo, Row>> getValidReplicas(boolean sortDesc, boolean isSource, int until) {
-    List<Pair<ReplicaInfo, Row>> allPossibleReplicas = new ArrayList<>();
+  List<Pair<Replica, Row>> getValidReplicas(boolean sortDesc, boolean isSource, int until) {
+    List<Pair<Replica, Row>> allPossibleReplicas = new ArrayList<>();
 
     if (sortDesc) {
       if (until == -1) until = getMatrix().size();
@@ -310,14 +310,14 @@ public abstract class Suggester implements MapWriter {
     return allPossibleReplicas;
   }
 
-  void addReplicaToList(Row r, boolean isSource, List<Pair<ReplicaInfo, Row>> replicaList) {
+  void addReplicaToList(Row r, boolean isSource, List<Pair<Replica, Row>> replicaList) {
     if (!isAllowed(r.node, isSource ? Hint.SRC_NODE : Hint.TARGET_NODE)) return;
-    for (Map.Entry<String, Map<String, List<ReplicaInfo>>> e : r.collectionVsShardVsReplicas.entrySet()) {
+    for (Map.Entry<String, Map<String, List<Replica>>> e : r.collectionVsShardVsReplicas.entrySet()) {
       if (!isAllowed(e.getKey(), Hint.COLL)) continue;
-      for (Map.Entry<String, List<ReplicaInfo>> shard : e.getValue().entrySet()) {
+      for (Map.Entry<String, List<Replica>> shard : e.getValue().entrySet()) {
         if (!isAllowed(new Pair<>(e.getKey(), shard.getKey()), Hint.COLL_SHARD)) continue;//todo fix
         if (shard.getValue() == null || shard.getValue().isEmpty()) continue;
-        for (ReplicaInfo replicaInfo : shard.getValue()) {
+        for (Replica replicaInfo : shard.getValue()) {
           if (replicaInfo.getName().startsWith("SYNTHETIC.")) continue;
           replicaList.add(new Pair<>(shard.getValue().get(0), r));
           break;
@@ -481,7 +481,7 @@ public abstract class Suggester implements MapWriter {
         row.forEachReplica(r -> {
           if (withCollection.equals(r.getCollection()) &&
               "shard1".equals(r.getShard())) {
-            withCollectionNodes.add(r.getNode());
+            withCollectionNodes.add(r.getNodeName());
           }
         });
       }
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggestion.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggestion.java
index 29fea84..e0d0a45 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggestion.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggestion.java
@@ -123,7 +123,7 @@ public class Suggestion {
       Suggester suggester = ctx.session.getSuggester(MOVEREPLICA)
           .forceOperation(true)
           .hint(Suggester.Hint.COLL_SHARD, new Pair<>(e.replicaInfo.getCollection(), e.replicaInfo.getShard()))
-          .hint(Suggester.Hint.SRC_NODE, e.replicaInfo.getNode());
+          .hint(Suggester.Hint.SRC_NODE, e.replicaInfo.getNodeName());
       if (ctx.addSuggestion(suggester) != null) {
         currentDelta--;
       }
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Variable.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Variable.java
index 4b45107..86af567 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Variable.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Variable.java
@@ -26,6 +26,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.function.Consumer;
 
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.rule.ImplicitSnitch;
 
 import static java.util.Collections.emptySet;
@@ -48,7 +49,7 @@ public interface Variable {
     return val;
   }
 
-  default void projectAddReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector, boolean strictMode) {
+  default void projectAddReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector, boolean strictMode) {
   }
 
   default boolean addViolatingReplicas(Violation.Ctx ctx) {
@@ -77,7 +78,7 @@ public interface Variable {
 
   int compareViolation(Violation v1, Violation v2);
 
-  default void projectRemoveReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector) {
+  default void projectRemoveReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector) {
   }
 
   default String postValidate(Condition condition) {
@@ -329,11 +330,11 @@ public interface Variable {
     /**
      * Simulate a replica addition to a node in the cluster
      */
-    public void projectAddReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector, boolean strictMode) {
+    public void projectAddReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector, boolean strictMode) {
       impl.projectAddReplica(cell, ri, opCollector, strictMode);
     }
 
-    public void projectRemoveReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector) {
+    public void projectRemoveReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector) {
       impl.projectRemoveReplica(cell, ri, opCollector);
     }
 
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Violation.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Violation.java
index e0d2048..41221a2 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Violation.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Violation.java
@@ -27,6 +27,7 @@ import java.util.function.Function;
 
 import org.apache.solr.common.IteratorWriter;
 import org.apache.solr.common.MapWriter;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.util.Utils;
 
 public class Violation implements MapWriter {
@@ -109,10 +110,10 @@ public class Violation implements MapWriter {
   }
 
   static class ReplicaInfoAndErr implements MapWriter{
-    final ReplicaInfo replicaInfo;
+    final Replica replicaInfo;
     Double delta;
 
-    ReplicaInfoAndErr(ReplicaInfo replicaInfo) {
+    ReplicaInfoAndErr(Replica replicaInfo) {
       this.replicaInfo = replicaInfo;
     }
 
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/WithCollectionVariable.java b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/WithCollectionVariable.java
index 8cab901..f0a9e04 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/WithCollectionVariable.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/WithCollectionVariable.java
@@ -56,7 +56,7 @@ public class WithCollectionVariable extends VariableBase {
     return true;
   }
 
-  public void projectAddReplica(Cell cell, ReplicaInfo ri, Consumer<Row.OperationInfo> opCollector, boolean strictMode) {
+  public void projectAddReplica(Cell cell, Replica ri, Consumer<Row.OperationInfo> opCollector, boolean strictMode) {
     if (strictMode) {
       // we do not want to add a replica of the 'withCollection' in strict mode
       return;
@@ -138,14 +138,14 @@ public class WithCollectionVariable extends VariableBase {
 
         if (hostedCollections.contains(withCollection) && !hostedCollections.contains(collection))  {
           // find the candidate replicas that we can move
-          List<ReplicaInfo> movableReplicas = new ArrayList<>();
+          List<Replica> movableReplicas = new ArrayList<>();
           row.forEachReplica(replicaInfo -> {
             if (replicaInfo.getCollection().equals(withCollection)) {
               movableReplicas.add(replicaInfo);
             }
           });
 
-          for (ReplicaInfo toMove : movableReplicas) {
+          for (Replica toMove : movableReplicas) {
             // candidate source node for a move replica operation
             Suggester suggester = ctx.session.getSuggester(MOVEREPLICA)
                 .forceOperation(true)
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/impl/SolrClientNodeStateProvider.java b/solr/solrj/src/java/org/apache/solr/client/solrj/impl/SolrClientNodeStateProvider.java
index 4f4b7d9..1ce3bee 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/impl/SolrClientNodeStateProvider.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/impl/SolrClientNodeStateProvider.java
@@ -34,7 +34,6 @@ import java.util.stream.Collectors;
 import org.apache.solr.client.solrj.SolrRequest;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.cloud.NodeStateProvider;
-import org.apache.solr.client.solrj.cloud.autoscaling.ReplicaInfo;
 import org.apache.solr.client.solrj.cloud.autoscaling.Row;
 import org.apache.solr.client.solrj.cloud.autoscaling.Variable.Type;
 import org.apache.solr.client.solrj.cloud.autoscaling.VariableBase;
@@ -45,6 +44,7 @@ import org.apache.solr.common.SolrException;
 import org.apache.solr.common.SolrException.ErrorCode;
 import org.apache.solr.common.cloud.ClusterState;
 import org.apache.solr.common.cloud.DocCollection;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.rule.ImplicitSnitch;
 import org.apache.solr.common.cloud.rule.SnitchContext;
 import org.apache.solr.common.params.CollectionAdminParams;
@@ -76,7 +76,7 @@ public class SolrClientNodeStateProvider implements NodeStateProvider, MapWriter
 
 
   private final CloudSolrClient solrClient;
-  protected final Map<String, Map<String, Map<String, List<ReplicaInfo>>>> nodeVsCollectionVsShardVsReplicaInfo = new HashMap<>();
+  protected final Map<String, Map<String, Map<String, List<Replica>>>> nodeVsCollectionVsShardVsReplicaInfo = new HashMap<>();
   private Map<String, Object> snitchSession = new HashMap<>();
   @SuppressWarnings({"rawtypes"})
   private Map<String, Map> nodeVsTags = new HashMap<>();
@@ -110,10 +110,10 @@ public class SolrClientNodeStateProvider implements NodeStateProvider, MapWriter
         withCollectionsMap.put(coll.getName(), (String) coll.getProperties().get(CollectionAdminParams.WITH_COLLECTION));
       }
       coll.forEachReplica((shard, replica) -> {
-        Map<String, Map<String, List<ReplicaInfo>>> nodeData = nodeVsCollectionVsShardVsReplicaInfo.computeIfAbsent(replica.getNodeName(), k -> new HashMap<>());
-        Map<String, List<ReplicaInfo>> collData = nodeData.computeIfAbsent(collName, k -> new HashMap<>());
-        List<ReplicaInfo> replicas = collData.computeIfAbsent(shard, k -> new ArrayList<>());
-        replicas.add(new ReplicaInfo(collName, shard, replica, new HashMap<>(replica.getProperties())));
+        Map<String, Map<String, List<Replica>>> nodeData = nodeVsCollectionVsShardVsReplicaInfo.computeIfAbsent(replica.getNodeName(), k -> new HashMap<>());
+        Map<String, List<Replica>> collData = nodeData.computeIfAbsent(collName, k -> new HashMap<>());
+        List<Replica> replicas = collData.computeIfAbsent(shard, k -> new ArrayList<>());
+        replicas.add((Replica) replica.clone());
       });
     });
   }
@@ -141,21 +141,21 @@ public class SolrClientNodeStateProvider implements NodeStateProvider, MapWriter
     return ctx.getTags();
   }
 
-  public void forEachReplica(String node, Consumer<ReplicaInfo> consumer){
+  public void forEachReplica(String node, Consumer<Replica> consumer){
     Row.forEachReplica(nodeVsCollectionVsShardVsReplicaInfo.get(node), consumer);
   }
 
 
   @Override
-  public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+  public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
     @SuppressWarnings({"unchecked"})
-    Map<String, Map<String, List<ReplicaInfo>>> result = nodeVsCollectionVsShardVsReplicaInfo.computeIfAbsent(node, Utils.NEW_HASHMAP_FUN);
+    Map<String, Map<String, List<Replica>>> result = nodeVsCollectionVsShardVsReplicaInfo.computeIfAbsent(node, Utils.NEW_HASHMAP_FUN);
     if (!keys.isEmpty()) {
-      Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica = new HashMap<>();
+      Map<String, Pair<String, Replica>> metricsKeyVsTagReplica = new HashMap<>();
       Row.forEachReplica(result, r -> {
         for (String key : keys) {
-          if (r.getVariables().containsKey(key)) continue;// it's already collected
-          String perReplicaMetricsKey = "solr.core." + r.getCollection() + "." + r.getShard() + "." + Utils.parseMetricsReplicaName(r.getCollection(), r.getCore()) + ":";
+          if (r.getProperties().containsKey(key)) continue;// it's already collected
+          String perReplicaMetricsKey = "solr.core." + r.getCollection() + "." + r.getShard() + "." + Utils.parseMetricsReplicaName(r.getCollection(), r.getCoreName()) + ":";
           Type tagType = VariableBase.getTagType(key);
           String perReplicaValue = key;
           if (tagType != null) {
@@ -170,10 +170,10 @@ public class SolrClientNodeStateProvider implements NodeStateProvider, MapWriter
       if (!metricsKeyVsTagReplica.isEmpty()) {
         Map<String, Object> tagValues = fetchReplicaMetrics(node, metricsKeyVsTagReplica);
         tagValues.forEach((k, o) -> {
-          Pair<String, ReplicaInfo> p = metricsKeyVsTagReplica.get(k);
+          Pair<String, Replica> p = metricsKeyVsTagReplica.get(k);
           Type validator = VariableBase.getTagType(p.first());
           if (validator != null) o = validator.convertVal(o);
-          if (p.second() != null) p.second().getVariables().put(p.first(), o);
+          if (p.second() != null) p.second().getProperties().put(p.first(), o);
         });
 
       }
@@ -181,7 +181,7 @@ public class SolrClientNodeStateProvider implements NodeStateProvider, MapWriter
     return result;
   }
 
-  protected Map<String, Object> fetchReplicaMetrics(String node, Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica) {
+  protected Map<String, Object> fetchReplicaMetrics(String node, Map<String, Pair<String, Replica>> metricsKeyVsTagReplica) {
     Map<String, Object> collect = metricsKeyVsTagReplica.entrySet().stream()
         .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getKey));
     ClientSnitchCtx ctx = new ClientSnitchCtx(null, null, emptyMap(), solrClient);
diff --git a/solr/solrj/src/java/org/apache/solr/common/cloud/Replica.java b/solr/solrj/src/java/org/apache/solr/common/cloud/Replica.java
index a022ed2..51a21db 100644
--- a/solr/solrj/src/java/org/apache/solr/common/cloud/Replica.java
+++ b/solr/solrj/src/java/org/apache/solr/common/cloud/Replica.java
@@ -16,13 +16,24 @@
  */
 package org.apache.solr.common.cloud;
 
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
+import java.util.function.BiPredicate;
 
+import org.apache.solr.common.MapWriter;
 import org.apache.solr.common.util.Utils;
-public class Replica extends ZkNodeProps {
+import org.noggit.JSONWriter;
+
+import static org.apache.solr.common.ConditionalMapWriter.NON_NULL_VAL;
+import static org.apache.solr.common.ConditionalMapWriter.dedupeKeyPredicate;
+
+public class Replica extends ZkNodeProps implements MapWriter {
   
   /**
    * The replica's state. In general, if the node the replica is hosted on is
@@ -101,45 +112,105 @@ public class Replica extends ZkNodeProps {
      */
     PULL;
 
-    public static Type get(String name){
+    public static Type get(String name) {
       return name == null ? Type.NRT : Type.valueOf(name.toUpperCase(Locale.ROOT));
     }
   }
 
-  private final String name;
-  private final String nodeName;
-  private final String core;
-  private final State state;
-  private final Type type;
-  public final String slice, collection;
+  // immutable
+  public final String name; // coreNode name
+  public final String node;
+  public final String core;
+  public final Type type;
+  public final String shard, collection;
+
+  // mutable
+  private State state;
 
-  public Replica(String name, Map<String,Object> propMap, String collection, String slice) {
-    super(propMap);
+  public Replica(String name, Map<String,Object> map, String collection, String shard) {
+    super(new HashMap<>());
+    propMap.putAll(map);
     this.collection = collection;
-    this.slice = slice;
+    this.shard = shard;
     this.name = name;
-    this.nodeName = (String) propMap.get(ZkStateReader.NODE_NAME_PROP);
+    this.node = (String) propMap.get(ZkStateReader.NODE_NAME_PROP);
     this.core = (String) propMap.get(ZkStateReader.CORE_NAME_PROP);
-    type = Type.get((String) propMap.get(ZkStateReader.REPLICA_TYPE));
-    Objects.requireNonNull(this.collection, "'collection' must not be null");
-    Objects.requireNonNull(this.slice, "'slice' must not be null");
+    this.type = Type.get((String) propMap.get(ZkStateReader.REPLICA_TYPE));
+    // default to ACTIVE
+    this.state = State.getState(String.valueOf(propMap.getOrDefault(ZkStateReader.STATE_PROP, State.ACTIVE.toString())));
+    validate();
+  }
+
+  // clone constructor
+  public Replica(String name, String node, String collection, String shard, String core,
+                  State state, Type type, Map<String, Object> props) {
+    super(new HashMap<>());
+    this.name = name;
+    this.node = node;
+    this.state = state;
+    this.type = type;
+    this.collection = collection;
+    this.shard = shard;
+    this.core = core;
+    if (props != null) {
+      this.propMap.putAll(props);
+    }
+    validate();
+  }
+
+  /**
+   * This constructor uses a map with one key (coreNode name) and a value that
+   * is a map containing all replica properties.
+   * @param nestedMap nested map containing replica properties
+   */
+  @SuppressWarnings("unchecked")
+  public Replica(Map<String, Object> nestedMap) {
+    this.name = nestedMap.keySet().iterator().next();
+    Map<String, Object> details = (Map<String, Object>) nestedMap.get(name);
+    Objects.requireNonNull(details);
+    details = Utils.getDeepCopy(details, 4);
+    this.collection = String.valueOf(details.get("collection"));
+    this.shard = String.valueOf(details.get("shard"));
+    this.core = String.valueOf(details.get("core"));
+    this.node = String.valueOf(details.get("node_name"));
+    type = Replica.Type.valueOf(String.valueOf(details.getOrDefault(ZkStateReader.REPLICA_TYPE, "NRT")));
+    state = State.getState(String.valueOf(details.getOrDefault(ZkStateReader.STATE_PROP, "active")));
+    this.propMap.putAll(details);
+    validate();
+
+  }
+
+  private final void validate() {
     Objects.requireNonNull(this.name, "'name' must not be null");
-    Objects.requireNonNull(this.nodeName, "'node_name' must not be null");
     Objects.requireNonNull(this.core, "'core' must not be null");
+    Objects.requireNonNull(this.collection, "'collection' must not be null");
+    Objects.requireNonNull(this.shard, "'shard' must not be null");
     Objects.requireNonNull(this.type, "'type' must not be null");
-    if (propMap.get(ZkStateReader.STATE_PROP) != null) {
-      this.state = State.getState((String) propMap.get(ZkStateReader.STATE_PROP));
-    } else {
-      this.state = State.ACTIVE;                         //Default to ACTIVE
-      propMap.put(ZkStateReader.STATE_PROP, state.toString());
-    }
+    Objects.requireNonNull(this.state, "'state' must not be null");
+    Objects.requireNonNull(this.node, "'node' must not be null");
+    // make sure all declared props are in the propMap
+    propMap.put(ZkStateReader.COLLECTION_PROP, collection);
+    propMap.put(ZkStateReader.SHARD_ID_PROP, shard);
+    propMap.put(ZkStateReader.CORE_NODE_NAME_PROP, name);
+    propMap.put(ZkStateReader.NODE_NAME_PROP, node);
+    propMap.put(ZkStateReader.CORE_NAME_PROP, core);
+    propMap.put(ZkStateReader.REPLICA_TYPE, type.toString());
+    propMap.put(ZkStateReader.STATE_PROP, state.toString());
   }
 
-  public String getCollection(){
+
+
+  public String getCollection() {
     return collection;
   }
-  public String getSlice(){
-    return slice;
+
+  public String getShard() {
+    return shard;
+  }
+
+  @Override
+  public Map<String, Object> getProperties() {
+    return super.getProperties();
   }
 
   @Override
@@ -148,9 +219,9 @@ public class Replica extends ZkNodeProps {
     if (o == null || getClass() != o.getClass()) return false;
     if (!super.equals(o)) return false;
 
-    Replica replica = (Replica) o;
+    Replica other = (Replica) o;
 
-    return name.equals(replica.name);
+    return name.equals(other.name);
   }
 
   @Override
@@ -166,7 +237,8 @@ public class Replica extends ZkNodeProps {
   public String getCoreUrl() {
     return ZkCoreNodeProps.getCoreUrl(getStr(ZkStateReader.BASE_URL_PROP), core);
   }
-  public String getBaseUrl(){
+
+  public String getBaseUrl() {
     return getStr(ZkStateReader.BASE_URL_PROP);
   }
 
@@ -177,7 +249,7 @@ public class Replica extends ZkNodeProps {
 
   /** The name of the node this replica resides on */
   public String getNodeName() {
-    return nodeName;
+    return node;
   }
   
   /** Returns the {@link State} of this replica. */
@@ -185,14 +257,32 @@ public class Replica extends ZkNodeProps {
     return state;
   }
 
+  public void setState(State state) {
+    this.state = state;
+    propMap.put(ZkStateReader.STATE_PROP, this.state.toString());
+  }
+
   public boolean isActive(Set<String> liveNodes) {
-    return this.nodeName != null && liveNodes.contains(this.nodeName) && this.state == State.ACTIVE;
+    return this.node != null && liveNodes.contains(this.node) && this.state == State.ACTIVE;
   }
   
   public Type getType() {
     return this.type;
   }
 
+  public boolean isLeader() {
+    return getBool(ZkStateReader.LEADER_PROP, false);
+  }
+
+  public Object get(String key, Object defValue) {
+    Object o = get(key);
+    if (o != null) {
+      return o;
+    } else {
+      return defValue;
+    }
+  }
+
   public String getProperty(String propertyName) {
     final String propertyKey;
     if (!propertyName.startsWith(ZkStateReader.PROPERTY_PROP_PREFIX)) {
@@ -204,6 +294,45 @@ public class Replica extends ZkNodeProps {
     return propertyValue;
   }
 
+  public Object clone() {
+    return new Replica(name, node, collection, shard, core, state, type,
+        propMap);
+  }
+
+  @Override
+  public void writeMap(MapWriter.EntryWriter ew) throws IOException {
+    ew.put(name, _allPropsWriter());
+  }
+
+
+  private MapWriter _allPropsWriter() {
+    BiPredicate<CharSequence, Object> p = dedupeKeyPredicate(new HashSet<>())
+        .and(NON_NULL_VAL);
+    return writer -> {
+      // XXX this is why this class should be immutable - it's a mess !!!
+
+      // propMap takes precedence because it's mutable and we can't control its
+      // contents, so a third party may override some declared fields
+      for (Map.Entry<String, Object> e : propMap.entrySet()) {
+        writer.put(e.getKey(), e.getValue(), p);
+      }
+      writer.put(ZkStateReader.CORE_NAME_PROP, core, p)
+          .put(ZkStateReader.SHARD_ID_PROP, shard, p)
+          .put(ZkStateReader.COLLECTION_PROP, collection, p)
+          .put(ZkStateReader.NODE_NAME_PROP, node, p)
+          .put(ZkStateReader.REPLICA_TYPE, type.toString(), p)
+          .put(ZkStateReader.STATE_PROP, state.toString(), p);
+    };
+  }
+
+  @Override
+  public void write(JSONWriter jsonWriter) {
+    Map<String, Object> map = new LinkedHashMap<>();
+    // this serializes also our declared properties
+    _allPropsWriter().toMap(map);
+    jsonWriter.write(map);
+  }
+
   @Override
   public String toString() {
     return name + ':' + Utils.toJSONString(propMap); // small enough, keep it on one line (i.e. no indent)
diff --git a/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggesterTest.java b/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggesterTest.java
index 5bea6ac..af60cd8 100644
--- a/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggesterTest.java
+++ b/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggesterTest.java
@@ -39,27 +39,27 @@ public class MoveReplicaSuggesterTest extends SolrTestCaseJ4 {
   private Replica.Type REPLICA_TYPE = Replica.Type.NRT;
   private Row ROW = null;
 
-  private ReplicaInfo REPLICA_INFO_ONE = new ReplicaInfo("core_node1", CORE, COLLECTION, SHARD, REPLICA_TYPE, NODE, IS_LEADER);
-  private ReplicaInfo REPLICA_INFO_TWO = new ReplicaInfo("core_node2", CORE, COLLECTION, SHARD, REPLICA_TYPE, NODE, null);
-  private ReplicaInfo REPLICA_INFO_THREE = new ReplicaInfo("core_node3", CORE, COLLECTION, SHARD, REPLICA_TYPE, NODE, IS_LEADER);
-  private ReplicaInfo REPLICA_INFO_FOUR = new ReplicaInfo("core_node4", CORE, COLLECTION, SHARD, REPLICA_TYPE, NODE, null);
+  private Replica REPLICA_INFO_ONE = new Replica("core_node1", NODE, COLLECTION, SHARD, CORE, Replica.State.ACTIVE, REPLICA_TYPE, IS_LEADER);
+  private Replica REPLICA_INFO_TWO = new Replica("core_node2", NODE, COLLECTION, SHARD, CORE, Replica.State.ACTIVE, REPLICA_TYPE, null);
+  private Replica REPLICA_INFO_THREE = new Replica("core_node3", NODE, COLLECTION, SHARD, CORE, Replica.State.ACTIVE, REPLICA_TYPE, IS_LEADER);
+  private Replica REPLICA_INFO_FOUR = new Replica("core_node4", NODE, COLLECTION, SHARD, CORE, Replica.State.ACTIVE, REPLICA_TYPE, null);
 
-  private Pair<ReplicaInfo, Row> PAIR_ONE = new Pair<>(REPLICA_INFO_ONE, ROW);
-  private Pair<ReplicaInfo, Row> PAIR_TWO = new Pair<>(REPLICA_INFO_TWO, ROW);
-  private Pair<ReplicaInfo, Row> PAIR_THREE = new Pair<>(REPLICA_INFO_THREE, ROW);
-  private Pair<ReplicaInfo, Row> PAIR_FOUR = new Pair<>(REPLICA_INFO_FOUR, ROW);
+  private Pair<Replica, Row> PAIR_ONE = new Pair<>(REPLICA_INFO_ONE, ROW);
+  private Pair<Replica, Row> PAIR_TWO = new Pair<>(REPLICA_INFO_TWO, ROW);
+  private Pair<Replica, Row> PAIR_THREE = new Pair<>(REPLICA_INFO_THREE, ROW);
+  private Pair<Replica, Row> PAIR_FOUR = new Pair<>(REPLICA_INFO_FOUR, ROW);
 
   @Test
   public void assertLeaderProperties() {
-    assertTrue(REPLICA_INFO_ONE.isLeader);
-    assertFalse(REPLICA_INFO_TWO.isLeader);
-    assertTrue(REPLICA_INFO_THREE.isLeader);
-    assertFalse(REPLICA_INFO_FOUR.isLeader);
+    assertTrue(REPLICA_INFO_ONE.isLeader());
+    assertFalse(REPLICA_INFO_TWO.isLeader());
+    assertTrue(REPLICA_INFO_THREE.isLeader());
+    assertFalse(REPLICA_INFO_FOUR.isLeader());
   }
 
   @Test
   public void sortReplicasValidate() {
-    List<Pair<ReplicaInfo, Row>> validReplicas = new ArrayList<Pair<ReplicaInfo, Row>>() {
+    List<Pair<Replica, Row>> validReplicas = new ArrayList<Pair<Replica, Row>>() {
       {
         add(PAIR_ONE);
         add(PAIR_FOUR);
@@ -78,7 +78,7 @@ public class MoveReplicaSuggesterTest extends SolrTestCaseJ4 {
 
   @Test
   public void sortReplicasValidateLeadersMultipleLeadersComeLast() {
-    List<Pair<ReplicaInfo, Row>> validReplicas = new ArrayList<Pair<ReplicaInfo, Row>>() {
+    List<Pair<Replica, Row>> validReplicas = new ArrayList<Pair<Replica, Row>>() {
       {
         add(PAIR_THREE);
         add(PAIR_ONE);
@@ -97,8 +97,8 @@ public class MoveReplicaSuggesterTest extends SolrTestCaseJ4 {
     assertTrue(isReplicaLeader(validReplicas, 3));
   }
 
-  private boolean isReplicaLeader(List<Pair<ReplicaInfo, Row>> replicas, int index) {
-    return replicas.get(index).first().isLeader;
+  private boolean isReplicaLeader(List<Pair<Replica, Row>> replicas, int index) {
+    return replicas.get(index).first().isLeader();
   }
 
 }
diff --git a/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy.java b/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy.java
index 9bc1d61..cc049a3 100644
--- a/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy.java
+++ b/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy.java
@@ -119,11 +119,11 @@ public class TestPolicy extends SolrTestCaseJ4 {
 
   public static String clusterState = Utils.toJSONString(loadFromResource("testPolicy.json"));
 
-  public static Map<String, Map<String, List<ReplicaInfo>>> getReplicaDetails(String node,
+  public static Map<String, Map<String, List<Replica>>> getReplicaDetails(String node,
                                                                               @SuppressWarnings({"rawtypes"})Map clusterState) {
     ValidatingJsonMap m = ValidatingJsonMap
         .getDeepCopy(clusterState, 6, true);
-    Map<String, Map<String, List<ReplicaInfo>>> result = new LinkedHashMap<>();
+    Map<String, Map<String, List<Replica>>> result = new LinkedHashMap<>();
 
     m.forEach((collName, o) -> {
       ValidatingJsonMap coll = (ValidatingJsonMap) o;
@@ -133,10 +133,10 @@ public class TestPolicy extends SolrTestCaseJ4 {
           ValidatingJsonMap r = (ValidatingJsonMap) o2;
           String node_name = (String) r.get("node_name");
           if (!node_name.equals(node)) return;
-          Map<String, List<ReplicaInfo>> shardVsReplicaStats = result.computeIfAbsent(collName, k -> new HashMap<>());
-          List<ReplicaInfo> replicaInfos = shardVsReplicaStats.computeIfAbsent(shard, k -> new ArrayList<>());
-          replicaInfos.add(new ReplicaInfo(replicaName, (String) r.get("core"), collName, shard,
-              Replica.Type.get((String) r.get(ZkStateReader.REPLICA_TYPE)), node, r));
+          Map<String, List<Replica>> shardVsReplicaStats = result.computeIfAbsent(collName, k -> new HashMap<>());
+          List<Replica> replicaInfos = shardVsReplicaStats.computeIfAbsent(shard, k -> new ArrayList<>());
+          replicaInfos.add(new Replica(replicaName, node, collName, shard, (String) r.get("core"),
+              Replica.State.ACTIVE, Replica.Type.get((String) r.get(ZkStateReader.REPLICA_TYPE)), r));
         });
       });
     });
@@ -173,7 +173,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
       }
 
       @Override
-      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica) {
+      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, Replica>> metricsKeyVsTagReplica) {
         //e.g: solr.core.perReplicaDataColl.shard1.replica_n4:INDEX.sizeInBytes
         Map<String, Object> result = new HashMap<>();
         metricsKeyVsTagReplica.forEach((k, v) -> {
@@ -270,7 +270,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
       }
 
       @Override
-      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica) {
+      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, Replica>> metricsKeyVsTagReplica) {
         //e.g: solr.core.perReplicaDataColl.shard1.replica_n4:INDEX.sizeInBytes
         Map<String, Object> result = new HashMap<>();
         metricsKeyVsTagReplica.forEach((k, v) -> {
@@ -365,7 +365,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
       }
 
       @Override
-      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica) {
+      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, Replica>> metricsKeyVsTagReplica) {
         //e.g: solr.core.perReplicaDataColl.shard1.replica_n4:INDEX.sizeInBytes
         Map<String, Object> result = new HashMap<>();
         metricsKeyVsTagReplica.forEach((k, v) -> {
@@ -475,7 +475,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
       }
 
       @Override
-      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica) {
+      protected Map<String, Object> fetchReplicaMetrics(String solrNode, Map<String, Pair<String, Replica>> metricsKeyVsTagReplica) {
         //e.g: solr.core.perReplicaDataColl.shard1.replica_n4:INDEX.sizeInBytes
         Map<String, Object> result = new HashMap<>();
         metricsKeyVsTagReplica.forEach((k, v) -> {
@@ -854,7 +854,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
       }
 
       @Override
-      protected Map<String, Object> fetchReplicaMetrics(String node, Map<String, Pair<String, ReplicaInfo>> metricsKeyVsTagReplica) {
+      protected Map<String, Object> fetchReplicaMetrics(String node, Map<String, Pair<String, Replica>> metricsKeyVsTagReplica) {
         //e.g: solr.core.perReplicaDataColl.shard1.replica_n4:INDEX.sizeInBytes
         Map<String, Object> result = new HashMap<>();
         metricsKeyVsTagReplica.forEach((k, v) -> {
@@ -905,7 +905,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
         assertEquals(3, violation.getViolatingReplicas().size());
         Set<String> expected = ImmutableSet.of("r1", "r3", "r5");
         for (Violation.ReplicaInfoAndErr replicaInfoAndErr : violation.getViolatingReplicas()) {
-          assertTrue(expected.contains(replicaInfoAndErr.replicaInfo.getCore()));
+          assertTrue(expected.contains(replicaInfoAndErr.replicaInfo.getCoreName()));
         }
       } else if (violation.node.equals("node5")) {
         assertEquals(-1, violation.replicaCountDelta.doubleValue(), 0.01);
@@ -1191,8 +1191,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
             String name = m3.keySet().iterator().next().toString();
             m3 = (Map) m3.get(name);
             Replica.Type type = Replica.Type.get((String) m3.get("type"));
-            l3.set(i, new ReplicaInfo(name, name
-                , coll.toString(), shard.toString(), type, (String) node, m3));
+            l3.set(i, new Replica(name, (String) node, coll.toString(), shard.toString(), name, Replica.State.ACTIVE, type, m3));
           }
         });
 
@@ -1239,9 +1238,9 @@ public class TestPolicy extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             @SuppressWarnings({"unchecked"})
-            Map<String, Map<String, List<ReplicaInfo>>> result = (Map<String, Map<String, List<ReplicaInfo>>>) Utils.getObjectByPath(m, false, Arrays.asList("replicaInfo", node));
+            Map<String, Map<String, List<Replica>>> result = (Map<String, Map<String, List<Replica>>>) Utils.getObjectByPath(m, false, Arrays.asList("replicaInfo", node));
             return result == null ? new HashMap<>() : result;
           }
         };
@@ -1481,10 +1480,10 @@ public class TestPolicy extends SolrTestCaseJ4 {
       public NodeStateProvider getNodeStateProvider() {
         return new DelegatingNodeStateProvider(null) {
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             @SuppressWarnings({"unchecked"})
-            Map<String, Map<String, List<ReplicaInfo>>> o = (Map<String, Map<String, List<ReplicaInfo>>>) Utils.fromJSONString("{c1: {s0:[{}]}}");
-            Utils.setObjectByPath(o, "c1/s0[0]", new ReplicaInfo("r0", "c1.s0", "c1", "s0", Replica.Type.NRT, "nodex", new HashMap<>()));
+            Map<String, Map<String, List<Replica>>> o = (Map<String, Map<String, List<Replica>>>) Utils.fromJSONString("{c1: {s0:[{}]}}");
+            Utils.setObjectByPath(o, "c1/s0[0]", new Replica("r0", "nodex", "c1", "s0", "c1.s0", Replica.State.ACTIVE, Replica.Type.NRT, new HashMap<>()));
             return o;
           }
 
@@ -1516,8 +1515,8 @@ public class TestPolicy extends SolrTestCaseJ4 {
     Row r2 = r1.addReplica("c1", "s1", Replica.Type.NRT);
     assertEquals(1, r1.collectionVsShardVsReplicas.get("c1").get("s1").size());
     assertEquals(2, r2.collectionVsShardVsReplicas.get("c1").get("s1").size());
-    assertTrue(r2.collectionVsShardVsReplicas.get("c1").get("s1").get(0) instanceof ReplicaInfo);
-    assertTrue(r2.collectionVsShardVsReplicas.get("c1").get("s1").get(1) instanceof ReplicaInfo);
+    assertTrue(r2.collectionVsShardVsReplicas.get("c1").get("s1").get(0) instanceof Replica);
+    assertTrue(r2.collectionVsShardVsReplicas.get("c1").get("s1").get(1) instanceof Replica);
   }
 
   public void testMerge() {
@@ -2019,8 +2018,10 @@ public class TestPolicy extends SolrTestCaseJ4 {
         "      {'core_node2':{}}]}}}");
     Map m = (Map) Utils.getObjectByPath(replicaInfoMap, false, "127.0.0.1:60089_solr/compute_plan_action_test");
     m.put("shard1", Arrays.asList(
-        new ReplicaInfo("core_node1", "core_node1", "compute_plan_action_test", "shard1", Replica.Type.NRT, "127.0.0.1:60089_solr", Collections.emptyMap()),
-        new ReplicaInfo("core_node2", "core_node2", "compute_plan_action_test", "shard1", Replica.Type.NRT, "127.0.0.1:60089_solr", Collections.emptyMap())));
+        new Replica("core_node1", "127.0.0.1:60089_solr", "compute_plan_action_test", "shard1", "core_node1",
+            Replica.State.ACTIVE, Replica.Type.NRT, Collections.emptyMap()),
+        new Replica("core_node2", "127.0.0.1:60089_solr", "compute_plan_action_test", "shard1", "core_node2",
+            Replica.State.ACTIVE, Replica.Type.NRT, Collections.emptyMap())));
 
     @SuppressWarnings({"unchecked", "rawtypes"})
     Map<String, Map<String, Object>> tagsMap = (Map) Utils.fromJSONString("{" +
@@ -2056,8 +2057,8 @@ public class TestPolicy extends SolrTestCaseJ4 {
 
           @Override
           @SuppressWarnings({"unchecked"})
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
-            return (Map<String, Map<String, List<ReplicaInfo>>>) replicaInfoMap.get(node);
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
+            return (Map<String, Map<String, List<Replica>>>) replicaInfoMap.get(node);
           }
         };
       }
@@ -2136,7 +2137,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             return cloudManager.getNodeStateProvider().getReplicaInfo(node, keys);
           }
         };
@@ -2214,7 +2215,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             return getReplicaDetails(node, clusterS);
           }
         };
@@ -2277,7 +2278,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             return getReplicaDetails(node, (Map)Utils.fromJSONString(clusterState));
           }
         };
@@ -2351,7 +2352,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             return getReplicaDetails(node, (Map)Utils.fromJSONString(clusterState));
           }
         };
@@ -2805,18 +2806,16 @@ public class TestPolicy extends SolrTestCaseJ4 {
 
           @Override
           @SuppressWarnings({"unchecked", "rawtypes"})
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             if (node.equals("node1")) {
               Map m = Utils.makeMap("newColl",
-                  Utils.makeMap("shard1", Collections.singletonList(new ReplicaInfo("r1", "shard1",
-                      new Replica("r1", Utils.makeMap(ZkStateReader.NODE_NAME_PROP, "node1", ZkStateReader.CORE_NAME_PROP, "core1"), "newColl", "shard1"),
-                      Utils.makeMap(FREEDISK.perReplicaValue, 200)))));
+                  Utils.makeMap("shard1", Collections.singletonList(new Replica("r1", "node1", "newColl", "shard1", "core1",
+                      Replica.State.ACTIVE, Replica.Type.NRT, Utils.makeMap(FREEDISK.perReplicaValue, 200)))));
               return m;
             } else if (node.equals("node2")) {
               Map m = Utils.makeMap("newColl",
-                  Utils.makeMap("shard2", Collections.singletonList(new ReplicaInfo("r1", "shard2",
-                      new Replica("r1", Utils.makeMap(ZkStateReader.NODE_NAME_PROP, "node2", ZkStateReader.CORE_NAME_PROP, "core2"),"newColl", "shard2"),
-                      Utils.makeMap(FREEDISK.perReplicaValue, 200)))));
+                  Utils.makeMap("shard2", Collections.singletonList(new Replica("r1", "node2", "newColl", "shard2", "core2",
+                      Replica.State.ACTIVE, Replica.Type.NRT, Utils.makeMap(FREEDISK.perReplicaValue, 200)))));
               return m;
             }
             return new HashMap<>();
@@ -2857,27 +2856,34 @@ public class TestPolicy extends SolrTestCaseJ4 {
 
   public void testMoveReplicaLeaderlast() {
 
-    List<Pair<ReplicaInfo, Row>> validReplicas = new ArrayList<>();
+    List<Pair<Replica, Row>> validReplicas = new ArrayList<>();
     Map<String, Object> propMap = Utils.makeMap(
         "leader", "true",
         ZkStateReader.NODE_NAME_PROP, "node1",
         ZkStateReader.REPLICA_TYPE, Replica.Type.NRT.toString(),
         ZkStateReader.CORE_NAME_PROP, "core1");
     Replica replica = new Replica("r1", propMap, "c1", "s1");
-    ReplicaInfo replicaInfo = new ReplicaInfo(replica.collection, replica.slice ,replica, new HashMap<>());
+    Replica replicaInfo = new Replica(replica.name, replica.node, replica.collection, replica.shard, replica.core,
+        replica.getState(), replica.type, replica.getProperties());
     validReplicas.add(new Pair<>(replicaInfo, null));
 
-    replicaInfo = new ReplicaInfo("r4", "c1_s2_r1", "c1", "s2", Replica.Type.NRT, "n1", Collections.singletonMap("leader", "true"));
+    replicaInfo = new Replica("r4", "n1", "c1_s2_r1", "c1", "s2", Replica.State.ACTIVE, Replica.Type.NRT,
+        Utils.makeMap(ZkStateReader.LEADER_PROP, "true"));
     validReplicas.add(new Pair<>(replicaInfo, null));
 
 
     propMap.put("leader", false);
+    propMap.put("core", "r2");
+    propMap.put("node_name", "n1");
     replica = new Replica("r2", propMap,"c1","s1");
-    replicaInfo = new ReplicaInfo(replica.collection, replica.slice, replica, new HashMap<>());
+    replicaInfo = new Replica(replica.name, replica.node, replica.collection, replica.shard, replica.core,
+        replica.getState(), replica.type, new HashMap<>());
     validReplicas.add(new Pair<>(replicaInfo, null));
 
+    propMap.put("core", "r2");
     replica = new Replica("r3", propMap,"c1","s1");
-    replicaInfo = new ReplicaInfo(replica.collection,replica.slice, replica, new HashMap<>());
+    replicaInfo = new Replica(replica.name, replica.node, replica.collection, replica.shard, replica.core,
+        replica.getState(), replica.type, new HashMap<>());
     validReplicas.add(new Pair<>(replicaInfo, null));
 
 
@@ -3128,8 +3134,8 @@ public class TestPolicy extends SolrTestCaseJ4 {
             String name = m3.keySet().iterator().next().toString();
             m3 = (Map) m3.get(name);
             Replica.Type type = Replica.Type.get((String) m3.get("type"));
-            l3.set(i, new ReplicaInfo(name, name
-                , coll.toString(), shard.toString(), type, (String) node, m3));
+            l3.set(i, new Replica(name, (String) node, coll.toString(), shard.toString(),
+                name, Replica.State.ACTIVE, type, m3));
           }
         });
 
@@ -3181,9 +3187,9 @@ public class TestPolicy extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             @SuppressWarnings({"unchecked"})
-            Map<String, Map<String, List<ReplicaInfo>>> result = (Map<String, Map<String, List<ReplicaInfo>>>) Utils.getObjectByPath(m, false, Arrays.asList("replicaInfo", node));
+            Map<String, Map<String, List<Replica>>> result = (Map<String, Map<String, List<Replica>>>) Utils.getObjectByPath(m, false, Arrays.asList("replicaInfo", node));
             return result == null ? new HashMap<>() : result;
           }
         };
@@ -3262,7 +3268,7 @@ public class TestPolicy extends SolrTestCaseJ4 {
 
           @Override
           @SuppressWarnings({"unchecked"})
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             //return Collections.EMPTY_MAP;
             return replicaInfoMap;
           }
diff --git a/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy2.java b/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy2.java
index b617193..e20b28f 100644
--- a/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy2.java
+++ b/solr/solrj/src/test/org/apache/solr/client/solrj/cloud/autoscaling/TestPolicy2.java
@@ -42,6 +42,7 @@ import org.apache.solr.client.solrj.impl.ClusterStateProvider;
 import org.apache.solr.client.solrj.impl.SolrClientNodeStateProvider;
 import org.apache.solr.common.SolrException;
 import org.apache.solr.common.cloud.ClusterState;
+import org.apache.solr.common.cloud.Replica;
 import org.apache.solr.common.cloud.ReplicaPosition;
 import org.apache.solr.common.util.Utils;
 import org.junit.Ignore;
@@ -230,17 +231,17 @@ public class TestPolicy2 extends SolrTestCaseJ4 {
           }
 
           @Override
-          public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+          public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
             @SuppressWarnings({"unchecked"})
-            Map<String, Map<String, List<ReplicaInfo>>> result = nodeVsCollectionVsShardVsReplicaInfo.computeIfAbsent(node, Utils.NEW_HASHMAP_FUN);
+            Map<String, Map<String, List<Replica>>> result = nodeVsCollectionVsShardVsReplicaInfo.computeIfAbsent(node, Utils.NEW_HASHMAP_FUN);
             if (!keys.isEmpty()) {
               Row.forEachReplica(result, replicaInfo -> {
                 for (String key : keys) {
-                  if (!replicaInfo.getVariables().containsKey(key)) {
+                  if (!replicaInfo.getProperties().containsKey(key)) {
                     replicaVals.stream()
-                        .filter(it -> replicaInfo.getCore().equals(it.get("core")))
+                        .filter(it -> replicaInfo.getCoreName().equals(it.get("core")))
                         .findFirst()
-                        .ifPresent(map -> replicaInfo.getVariables().put(key, map.get(key)));
+                        .ifPresent(map -> replicaInfo.getProperties().put(key, map.get(key)));
                   }
                 }
               });
@@ -279,17 +280,17 @@ public class TestPolicy2 extends SolrTestCaseJ4 {
           Map<String, Map<String, List<Map>>> replicas = (Map<String, Map<String, List<Map>>>) ((Map) o).get("replicas");
           replicas.forEach((coll, shardVsReplicas) -> shardVsReplicas
               .forEach((shard, repDetails) -> {
-                List<ReplicaInfo> reps = (List) ((Map) nodeDetails
+                List<Replica> reps = (List) ((Map) nodeDetails
                     .computeIfAbsent(coll, o1 -> new LinkedHashMap<>()))
-                    .computeIfAbsent(shard, o12 -> new ArrayList<ReplicaInfo>());
-                for (Map map : repDetails) reps.add(new ReplicaInfo(map));
+                    .computeIfAbsent(shard, o12 -> new ArrayList<Replica>());
+                for (Map map : repDetails) reps.add(new Replica(map));
               }));
         }
 
       }
 
       @Override
-      public Map<String, Map<String, List<ReplicaInfo>>> getReplicaInfo(String node, Collection<String> keys) {
+      public Map<String, Map<String, List<Replica>>> getReplicaInfo(String node, Collection<String> keys) {
         return nodeVsCollectionVsShardVsReplicaInfo.get(node) == null ?
             Collections.emptyMap() :
             nodeVsCollectionVsShardVsReplicaInfo.get(node);