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Posted to commits@hbase.apache.org by bb...@apache.org on 2022/07/07 20:33:26 UTC

[hbase] branch branch-2 updated: HBASE-27078 Allow configuring a separate timeout for meta scans (#4585)

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

bbeaudreault pushed a commit to branch branch-2
in repository https://gitbox.apache.org/repos/asf/hbase.git


The following commit(s) were added to refs/heads/branch-2 by this push:
     new 11283cac96c HBASE-27078 Allow configuring a separate timeout for meta scans (#4585)
11283cac96c is described below

commit 11283cac96c68526db10c94d131190ae522307f3
Author: Bryan Beaudreault <bb...@hubspot.com>
AuthorDate: Thu Jul 7 16:33:16 2022 -0400

    HBASE-27078 Allow configuring a separate timeout for meta scans (#4585)
    
    Signed-off-by: Duo Zhang <zh...@apache.org>
    Signed-off-by: Andrew Purtell <ap...@apache.org>
---
 .../hbase/client/AsyncConnectionConfiguration.java |  28 +-
 .../hadoop/hbase/client/AsyncTableBuilderBase.java |   7 +-
 .../hbase/client/ClientAsyncPrefetchScanner.java   |   6 +-
 .../apache/hadoop/hbase/client/ClientScanner.java  |  15 +-
 .../hadoop/hbase/client/ClientSimpleScanner.java   |   6 +-
 .../hbase/client/ConnectionConfiguration.java      |  31 ++
 .../hbase/client/ConnectionImplementation.java     |   3 +-
 .../org/apache/hadoop/hbase/client/HTable.java     |  16 +-
 .../client/ResultBoundedCompletionService.java     |  15 +-
 .../hadoop/hbase/client/ReversedClientScanner.java |   6 +-
 .../client/RpcRetryingCallerWithReadReplicas.java  |   2 +-
 .../hbase/client/ScannerCallableWithReplicas.java  |  10 +-
 .../hadoop/hbase/client/TableBuilderBase.java      |   6 +
 .../hadoop/hbase/client/TestClientScanner.java     |   6 +-
 .../hbase/client/TestClientScannerRPCTimeout.java  | 198 ---------
 .../hbase/client/TestClientScannerTimeouts.java    | 488 +++++++++++++++++++++
 .../regionserver/TestScannerHeartbeatMessages.java |  13 +-
 17 files changed, 615 insertions(+), 241 deletions(-)

diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionConfiguration.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionConfiguration.java
index ffccc127914..5fb95ebbd87 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionConfiguration.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionConfiguration.java
@@ -23,6 +23,8 @@ import static org.apache.hadoop.hbase.HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PE
 import static org.apache.hadoop.hbase.HConstants.HBASE_META_SCANNER_CACHING;
 import static org.apache.hadoop.hbase.HConstants.HBASE_RPC_READ_TIMEOUT_KEY;
 import static org.apache.hadoop.hbase.HConstants.HBASE_RPC_WRITE_TIMEOUT_KEY;
+import static org.apache.hadoop.hbase.client.ConnectionConfiguration.HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY;
+import static org.apache.hadoop.hbase.client.ConnectionConfiguration.HBASE_CLIENT_META_SCANNER_TIMEOUT;
 
 import java.util.concurrent.TimeUnit;
 import org.apache.hadoop.conf.Configuration;
@@ -57,6 +59,9 @@ class AsyncConnectionConfiguration {
   // timeout for each read rpc request
   private final long readRpcTimeoutNs;
 
+  // timeout for each read rpc request against system tables
+  private final long metaReadRpcTimeoutNs;
+
   // timeout for each write rpc request
   private final long writeRpcTimeoutNs;
 
@@ -74,6 +79,7 @@ class AsyncConnectionConfiguration {
   // client that it is still alive. The scan timeout is used as operation timeout for every
   // operations in a scan, such as openScanner or next.
   private final long scanTimeoutNs;
+  private final long metaScanTimeoutNs;
 
   private final int scannerCaching;
 
@@ -111,8 +117,11 @@ class AsyncConnectionConfiguration {
       TimeUnit.MILLISECONDS.toNanos(connectionConf.getMetaOperationTimeout());
     this.operationTimeoutNs = TimeUnit.MILLISECONDS.toNanos(connectionConf.getOperationTimeout());
     this.rpcTimeoutNs = TimeUnit.MILLISECONDS.toNanos(connectionConf.getRpcTimeout());
-    this.readRpcTimeoutNs = TimeUnit.MILLISECONDS
-      .toNanos(conf.getLong(HBASE_RPC_READ_TIMEOUT_KEY, connectionConf.getReadRpcTimeout()));
+    long readRpcTimeoutMillis =
+      conf.getLong(HBASE_RPC_READ_TIMEOUT_KEY, connectionConf.getRpcTimeout());
+    this.readRpcTimeoutNs = TimeUnit.MILLISECONDS.toNanos(readRpcTimeoutMillis);
+    this.metaReadRpcTimeoutNs = TimeUnit.MILLISECONDS
+      .toNanos(conf.getLong(HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY, readRpcTimeoutMillis));
     this.writeRpcTimeoutNs = TimeUnit.MILLISECONDS
       .toNanos(conf.getLong(HBASE_RPC_WRITE_TIMEOUT_KEY, connectionConf.getWriteRpcTimeout()));
     this.pauseNs = TimeUnit.MILLISECONDS.toNanos(connectionConf.getPauseMillis());
@@ -124,8 +133,11 @@ class AsyncConnectionConfiguration {
       TimeUnit.MICROSECONDS.toNanos(connectionConf.getReplicaCallTimeoutMicroSecondScan());
     this.primaryMetaScanTimeoutNs =
       TimeUnit.MICROSECONDS.toNanos(connectionConf.getMetaReplicaCallTimeoutMicroSecondScan());
-    this.scanTimeoutNs = TimeUnit.MILLISECONDS.toNanos(conf
-      .getInt(HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD));
+    long scannerTimeoutMillis = conf.getLong(HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
+      DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
+    this.scanTimeoutNs = TimeUnit.MILLISECONDS.toNanos(scannerTimeoutMillis);
+    this.metaScanTimeoutNs = TimeUnit.MILLISECONDS
+      .toNanos(conf.getLong(HBASE_CLIENT_META_SCANNER_TIMEOUT, scannerTimeoutMillis));
 
     // fields not in connection configuration
     this.startLogErrorsCnt =
@@ -150,6 +162,10 @@ class AsyncConnectionConfiguration {
     return readRpcTimeoutNs;
   }
 
+  long getMetaReadRpcTimeoutNs() {
+    return metaReadRpcTimeoutNs;
+  }
+
   long getWriteRpcTimeoutNs() {
     return writeRpcTimeoutNs;
   }
@@ -174,6 +190,10 @@ class AsyncConnectionConfiguration {
     return scanTimeoutNs;
   }
 
+  long getMetaScanTimeoutNs() {
+    return metaScanTimeoutNs;
+  }
+
   int getScannerCaching() {
     return scannerCaching;
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBuilderBase.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBuilderBase.java
index 7c58e8c672f..624d6e1dbb0 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBuilderBase.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBuilderBase.java
@@ -55,9 +55,12 @@ abstract class AsyncTableBuilderBase<C extends ScanResultConsumerBase>
     this.operationTimeoutNs = tableName.isSystemTable()
       ? connConf.getMetaOperationTimeoutNs()
       : connConf.getOperationTimeoutNs();
-    this.scanTimeoutNs = connConf.getScanTimeoutNs();
+    this.scanTimeoutNs =
+      tableName.isSystemTable() ? connConf.getMetaScanTimeoutNs() : connConf.getScanTimeoutNs();
     this.rpcTimeoutNs = connConf.getRpcTimeoutNs();
-    this.readRpcTimeoutNs = connConf.getReadRpcTimeoutNs();
+    this.readRpcTimeoutNs = tableName.isSystemTable()
+      ? connConf.getMetaReadRpcTimeoutNs()
+      : connConf.getReadRpcTimeoutNs();
     this.writeRpcTimeoutNs = connConf.getWriteRpcTimeoutNs();
     this.pauseNs = connConf.getPauseNs();
     this.pauseNsForServerOverloaded = connConf.getPauseNsForServerOverloaded();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientAsyncPrefetchScanner.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientAsyncPrefetchScanner.java
index 928dd957e12..6c221590500 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientAsyncPrefetchScanner.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientAsyncPrefetchScanner.java
@@ -63,10 +63,10 @@ public class ClientAsyncPrefetchScanner extends ClientSimpleScanner {
 
   public ClientAsyncPrefetchScanner(Configuration configuration, Scan scan, TableName name,
     ClusterConnection connection, RpcRetryingCallerFactory rpcCallerFactory,
-    RpcControllerFactory rpcControllerFactory, ExecutorService pool,
-    int replicaCallTimeoutMicroSecondScan) throws IOException {
+    RpcControllerFactory rpcControllerFactory, ExecutorService pool, int scanReadRpcTimeout,
+    int scannerTimeout, int replicaCallTimeoutMicroSecondScan) throws IOException {
     super(configuration, scan, name, connection, rpcCallerFactory, rpcControllerFactory, pool,
-      replicaCallTimeoutMicroSecondScan);
+      scanReadRpcTimeout, scannerTimeout, replicaCallTimeoutMicroSecondScan);
     exceptionsQueue = new ConcurrentLinkedQueue<>();
     final Context context = Context.current();
     final Runnable runnable = context.wrap(new PrefetchRunnable());
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
index dbc03fce1d5..1d656873bbe 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
@@ -75,6 +75,7 @@ public abstract class ClientScanner extends AbstractClientScanner {
   protected final long maxScannerResultSize;
   private final ClusterConnection connection;
   protected final TableName tableName;
+  protected final int readRpcTimeout;
   protected final int scannerTimeout;
   protected boolean scanMetricsPublished = false;
   protected RpcRetryingCaller<Result[]> caller;
@@ -100,8 +101,8 @@ public abstract class ClientScanner extends AbstractClientScanner {
    */
   public ClientScanner(final Configuration conf, final Scan scan, final TableName tableName,
     ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
-    RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
-    throws IOException {
+    RpcControllerFactory controllerFactory, ExecutorService pool, int scanReadRpcTimeout,
+    int scannerTimeout, int primaryOperationTimeout) throws IOException {
     if (LOG.isTraceEnabled()) {
       LOG.trace(
         "Scan table=" + tableName + ", startRow=" + Bytes.toStringBinary(scan.getStartRow()));
@@ -120,8 +121,8 @@ public abstract class ClientScanner extends AbstractClientScanner {
       this.maxScannerResultSize = conf.getLong(HConstants.HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY,
         HConstants.DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE);
     }
-    this.scannerTimeout = conf.getInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
-      HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
+    this.readRpcTimeout = scanReadRpcTimeout;
+    this.scannerTimeout = scannerTimeout;
 
     // check if application wants to collect scan metrics
     initScanMetrics(scan);
@@ -248,9 +249,9 @@ public abstract class ClientScanner extends AbstractClientScanner {
     // clear the current region, we will set a new value to it after the first call of the new
     // callable.
     this.currentRegion = null;
-    this.callable =
-      new ScannerCallableWithReplicas(getTable(), getConnection(), createScannerCallable(), pool,
-        primaryOperationTimeout, scan, getRetries(), scannerTimeout, caching, conf, caller);
+    this.callable = new ScannerCallableWithReplicas(getTable(), getConnection(),
+      createScannerCallable(), pool, primaryOperationTimeout, scan, getRetries(), readRpcTimeout,
+      scannerTimeout, caching, conf, caller);
     this.callable.setCaching(this.caching);
     incRegionCountMetrics(scanMetrics);
     return true;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientSimpleScanner.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientSimpleScanner.java
index a1530c9bb7c..51d1bb1b228 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientSimpleScanner.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientSimpleScanner.java
@@ -36,10 +36,10 @@ import org.apache.yetus.audience.InterfaceAudience;
 public class ClientSimpleScanner extends ClientScanner {
   public ClientSimpleScanner(Configuration configuration, Scan scan, TableName name,
     ClusterConnection connection, RpcRetryingCallerFactory rpcCallerFactory,
-    RpcControllerFactory rpcControllerFactory, ExecutorService pool,
-    int replicaCallTimeoutMicroSecondScan) throws IOException {
+    RpcControllerFactory rpcControllerFactory, ExecutorService pool, int scanReadRpcTimeout,
+    int scannerTimeout, int replicaCallTimeoutMicroSecondScan) throws IOException {
     super(configuration, scan, name, connection, rpcCallerFactory, rpcControllerFactory, pool,
-      replicaCallTimeoutMicroSecondScan);
+      scanReadRpcTimeout, scannerTimeout, replicaCallTimeoutMicroSecondScan);
   }
 
   @Override
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionConfiguration.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionConfiguration.java
index c8a283d0869..93fa2600d89 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionConfiguration.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionConfiguration.java
@@ -71,6 +71,11 @@ public class ConnectionConfiguration {
       HBASE_CLIENT_PAUSE_FOR_SERVER_OVERLOADED);
   }
 
+  public static final String HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY =
+    "hbase.client.meta.read.rpc.timeout";
+  public static final String HBASE_CLIENT_META_SCANNER_TIMEOUT =
+    "hbase.client.meta.scanner.timeout.period";
+
   private final long writeBufferSize;
   private final long writeBufferPeriodicFlushTimeoutMs;
   private final long writeBufferPeriodicFlushTimerTickMs;
@@ -85,7 +90,11 @@ public class ConnectionConfiguration {
   private final int maxKeyValueSize;
   private final int rpcTimeout;
   private final int readRpcTimeout;
+  private final int metaReadRpcTimeout;
   private final int writeRpcTimeout;
+  private final int scanTimeout;
+  private final int metaScanTimeout;
+
   // toggle for async/sync prefetch
   private final boolean clientScannerAsyncPrefetch;
   private final long pauseMs;
@@ -140,9 +149,16 @@ public class ConnectionConfiguration {
     this.readRpcTimeout = conf.getInt(HConstants.HBASE_RPC_READ_TIMEOUT_KEY,
       conf.getInt(HConstants.HBASE_RPC_TIMEOUT_KEY, HConstants.DEFAULT_HBASE_RPC_TIMEOUT));
 
+    this.metaReadRpcTimeout = conf.getInt(HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY, readRpcTimeout);
+
     this.writeRpcTimeout = conf.getInt(HConstants.HBASE_RPC_WRITE_TIMEOUT_KEY,
       conf.getInt(HConstants.HBASE_RPC_TIMEOUT_KEY, HConstants.DEFAULT_HBASE_RPC_TIMEOUT));
 
+    this.scanTimeout = conf.getInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
+      HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
+
+    this.metaScanTimeout = conf.getInt(HBASE_CLIENT_META_SCANNER_TIMEOUT, scanTimeout);
+
     long pauseMs = conf.getLong(HBASE_CLIENT_PAUSE, DEFAULT_HBASE_CLIENT_PAUSE);
     long pauseMsForServerOverloaded = conf.getLong(HBASE_CLIENT_PAUSE_FOR_SERVER_OVERLOADED,
       conf.getLong(HConstants.HBASE_CLIENT_PAUSE_FOR_CQTBE, pauseMs));
@@ -178,8 +194,11 @@ public class ConnectionConfiguration {
     this.clientScannerAsyncPrefetch = Scan.DEFAULT_HBASE_CLIENT_SCANNER_ASYNC_PREFETCH;
     this.maxKeyValueSize = MAX_KEYVALUE_SIZE_DEFAULT;
     this.readRpcTimeout = HConstants.DEFAULT_HBASE_RPC_TIMEOUT;
+    this.metaReadRpcTimeout = HConstants.DEFAULT_HBASE_RPC_TIMEOUT;
     this.writeRpcTimeout = HConstants.DEFAULT_HBASE_RPC_TIMEOUT;
     this.rpcTimeout = HConstants.DEFAULT_HBASE_RPC_TIMEOUT;
+    this.scanTimeout = HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD;
+    this.metaScanTimeout = scanTimeout;
     this.pauseMs = DEFAULT_HBASE_CLIENT_PAUSE;
     this.pauseMsForServerOverloaded = DEFAULT_HBASE_CLIENT_PAUSE;
   }
@@ -188,6 +207,10 @@ public class ConnectionConfiguration {
     return readRpcTimeout;
   }
 
+  public int getMetaReadRpcTimeout() {
+    return metaReadRpcTimeout;
+  }
+
   public int getWriteRpcTimeout() {
     return writeRpcTimeout;
   }
@@ -248,6 +271,14 @@ public class ConnectionConfiguration {
     return rpcTimeout;
   }
 
+  public int getScanTimeout() {
+    return scanTimeout;
+  }
+
+  public int getMetaScanTimeout() {
+    return metaScanTimeout;
+  }
+
   public long getPauseMillis() {
     return pauseMs;
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
index 62317224367..bf97b71b137 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
@@ -968,7 +968,8 @@ public class ConnectionImplementation implements ClusterConnection, Closeable {
         try (Scope ignored = span.makeCurrent();
           ReversedClientScanner rcs =
             new ReversedClientScanner(conf, s, TableName.META_TABLE_NAME, this, rpcCallerFactory,
-              rpcControllerFactory, getMetaLookupPool(), metaReplicaCallTimeoutScanInMicroSecond)) {
+              rpcControllerFactory, getMetaLookupPool(), connectionConfig.getMetaReadRpcTimeout(),
+              connectionConfig.getMetaScanTimeout(), metaReplicaCallTimeoutScanInMicroSecond)) {
           boolean tableNotFound = true;
           for (;;) {
             Result regionInfoRow = rcs.next();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
index f8fa218fe59..fcc928b5c63 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
@@ -120,6 +120,9 @@ public class HTable implements Table {
   private final int rpcTimeoutMs; // FIXME we should use this for rpc like batch and checkAndXXX
   private int readRpcTimeoutMs; // timeout for each read rpc request
   private int writeRpcTimeoutMs; // timeout for each write rpc request
+
+  private final int scanReadRpcTimeout;
+  private final int scanTimeout;
   private final boolean cleanupPoolOnClose; // shutdown the pool in close()
   private final HRegionLocator locator;
 
@@ -191,6 +194,8 @@ public class HTable implements Table {
     this.rpcTimeoutMs = builder.rpcTimeout;
     this.readRpcTimeoutMs = builder.readRpcTimeout;
     this.writeRpcTimeoutMs = builder.writeRpcTimeout;
+    this.scanReadRpcTimeout = builder.scanReadRpcTimeout;
+    this.scanTimeout = builder.scanTimeout;
     this.scannerCaching = connConfiguration.getScannerCaching();
     this.scannerMaxResultSize = connConfiguration.getScannerMaxResultSize();
 
@@ -312,18 +317,21 @@ public class HTable implements Table {
       final boolean async = scan.isAsyncPrefetch() != null
         ? scan.isAsyncPrefetch()
         : connConfiguration.isClientScannerAsyncPrefetch();
-      final int timeout = connConfiguration.getReplicaCallTimeoutMicroSecondScan();
+      final int replicaTimeout = connConfiguration.getReplicaCallTimeoutMicroSecondScan();
 
       if (scan.isReversed()) {
         return new ReversedClientScanner(getConfiguration(), scan, getName(), connection,
-          rpcCallerFactory, rpcControllerFactory, pool, timeout);
+          rpcCallerFactory, rpcControllerFactory, pool, scanReadRpcTimeout, scanTimeout,
+          replicaTimeout);
       } else {
         if (async) {
           return new ClientAsyncPrefetchScanner(getConfiguration(), scan, getName(), connection,
-            rpcCallerFactory, rpcControllerFactory, pool, timeout);
+            rpcCallerFactory, rpcControllerFactory, pool, scanReadRpcTimeout, scanTimeout,
+            replicaTimeout);
         } else {
           return new ClientSimpleScanner(getConfiguration(), scan, getName(), connection,
-            rpcCallerFactory, rpcControllerFactory, pool, timeout);
+            rpcCallerFactory, rpcControllerFactory, pool, scanReadRpcTimeout, scanTimeout,
+            replicaTimeout);
         }
       }
     }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultBoundedCompletionService.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultBoundedCompletionService.java
index 7a2c4b160c1..9746548222c 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultBoundedCompletionService.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultBoundedCompletionService.java
@@ -53,15 +53,16 @@ public class ResultBoundedCompletionService<V> {
     private T result = null;
     private ExecutionException exeEx = null;
     private volatile boolean cancelled = false;
-    private final int callTimeout;
+    private final int operationTimeout;
     private final RpcRetryingCaller<T> retryingCaller;
     private boolean resultObtained = false;
     private final int replicaId; // replica id
 
-    public QueueingFuture(RetryingCallable<T> future, int callTimeout, int id) {
+    public QueueingFuture(RetryingCallable<T> future, int rpcTimeout, int operationTimeout,
+      int id) {
       this.future = future;
-      this.callTimeout = callTimeout;
-      this.retryingCaller = retryingCallerFactory.<T> newCaller();
+      this.operationTimeout = operationTimeout;
+      this.retryingCaller = retryingCallerFactory.<T> newCaller(rpcTimeout);
       this.replicaId = id;
     }
 
@@ -70,7 +71,7 @@ public class ResultBoundedCompletionService<V> {
     public void run() {
       try {
         if (!cancelled) {
-          result = this.retryingCaller.callWithRetries(future, callTimeout);
+          result = this.retryingCaller.callWithRetries(future, operationTimeout);
           resultObtained = true;
         }
       } catch (Throwable t) {
@@ -157,8 +158,8 @@ public class ResultBoundedCompletionService<V> {
     this.completedTasks = new ArrayList<>(maxTasks);
   }
 
-  public void submit(RetryingCallable<V> task, int callTimeout, int id) {
-    QueueingFuture<V> newFuture = new QueueingFuture<>(task, callTimeout, id);
+  public void submit(RetryingCallable<V> task, int rpcTimeout, int operationTimeout, int id) {
+    QueueingFuture<V> newFuture = new QueueingFuture<>(task, rpcTimeout, operationTimeout, id);
     // remove trace for runnable because HBASE-25373 and OpenTelemetry do not cover TraceRunnable
     executor.execute(newFuture);
     tasks[id] = newFuture;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedClientScanner.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedClientScanner.java
index 44ad82a38cd..8b6e6e46d17 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedClientScanner.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedClientScanner.java
@@ -38,10 +38,10 @@ public class ReversedClientScanner extends ClientScanner {
    */
   public ReversedClientScanner(Configuration conf, Scan scan, TableName tableName,
     ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
-    RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
-    throws IOException {
+    RpcControllerFactory controllerFactory, ExecutorService pool, int scanReadRpcTimeout,
+    int scannerTimeout, int primaryOperationTimeout) throws IOException {
     super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
-      primaryOperationTimeout);
+      scanReadRpcTimeout, scannerTimeout, primaryOperationTimeout);
   }
 
   @Override
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RpcRetryingCallerWithReadReplicas.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RpcRetryingCallerWithReadReplicas.java
index 902993c2bd8..5b2208c1cc7 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RpcRetryingCallerWithReadReplicas.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RpcRetryingCallerWithReadReplicas.java
@@ -305,7 +305,7 @@ public class RpcRetryingCallerWithReadReplicas {
     for (int id = min; id <= max; id++) {
       HRegionLocation hrl = rl.getRegionLocation(id);
       ReplicaRegionServerCallable callOnReplica = new ReplicaRegionServerCallable(id, hrl);
-      cs.submit(callOnReplica, operationTimeout, id);
+      cs.submit(callOnReplica, rpcTimeout, operationTimeout, id);
     }
   }
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java
index 05cb850e337..21653214ce6 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java
@@ -64,14 +64,15 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
   private final RpcRetryingCaller<Result[]> caller;
   private final TableName tableName;
   private Configuration conf;
-  private int scannerTimeout;
+  private final int scannerTimeout;
+  private final int readRpcTimeout;
   private Set<ScannerCallable> outstandingCallables = new HashSet<>();
   private boolean someRPCcancelled = false; // required for testing purposes only
   private int regionReplication = 0;
 
   public ScannerCallableWithReplicas(TableName tableName, ClusterConnection cConnection,
     ScannerCallable baseCallable, ExecutorService pool, int timeBeforeReplicas, Scan scan,
-    int retries, int scannerTimeout, int caching, Configuration conf,
+    int retries, int readRpcTimeout, int scannerTimeout, int caching, Configuration conf,
     RpcRetryingCaller<Result[]> caller) {
     this.currentScannerCallable = baseCallable;
     this.cConnection = cConnection;
@@ -84,6 +85,7 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
     this.retries = retries;
     this.tableName = tableName;
     this.conf = conf;
+    this.readRpcTimeout = readRpcTimeout;
     this.scannerTimeout = scannerTimeout;
     this.caller = caller;
   }
@@ -323,7 +325,7 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
     addCallsForCurrentReplica(ResultBoundedCompletionService<Pair<Result[], ScannerCallable>> cs) {
     RetryingRPC retryingOnReplica = new RetryingRPC(currentScannerCallable);
     outstandingCallables.add(currentScannerCallable);
-    cs.submit(retryingOnReplica, scannerTimeout, currentScannerCallable.id);
+    cs.submit(retryingOnReplica, readRpcTimeout, scannerTimeout, currentScannerCallable.id);
   }
 
   private void addCallsForOtherReplicas(
@@ -337,7 +339,7 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
       setStartRowForReplicaCallable(s);
       outstandingCallables.add(s);
       RetryingRPC retryingOnReplica = new RetryingRPC(s);
-      cs.submit(retryingOnReplica, scannerTimeout, id);
+      cs.submit(retryingOnReplica, readRpcTimeout, scannerTimeout, id);
     }
   }
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableBuilderBase.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableBuilderBase.java
index 796fd6496f7..43d7a1894ea 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableBuilderBase.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableBuilderBase.java
@@ -35,6 +35,8 @@ abstract class TableBuilderBase implements TableBuilder {
   protected int readRpcTimeout;
 
   protected int writeRpcTimeout;
+  protected final int scanReadRpcTimeout;
+  protected int scanTimeout;
 
   TableBuilderBase(TableName tableName, ConnectionConfiguration connConf) {
     if (tableName == null) {
@@ -46,6 +48,10 @@ abstract class TableBuilderBase implements TableBuilder {
       : connConf.getOperationTimeout();
     this.rpcTimeout = connConf.getRpcTimeout();
     this.readRpcTimeout = connConf.getReadRpcTimeout();
+    this.scanReadRpcTimeout =
+      tableName.isSystemTable() ? connConf.getMetaReadRpcTimeout() : readRpcTimeout;
+    this.scanTimeout =
+      tableName.isSystemTable() ? connConf.getMetaScanTimeout() : connConf.getScanTimeout();
     this.writeRpcTimeout = connConf.getWriteRpcTimeout();
   }
 
diff --git a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientScanner.java b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientScanner.java
index c2c2bb3f98d..38776e337fe 100644
--- a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientScanner.java
+++ b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientScanner.java
@@ -37,6 +37,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellScanner;
 import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.KeyValue;
 import org.apache.hadoop.hbase.KeyValue.Type;
 import org.apache.hadoop.hbase.RegionLocations;
@@ -107,7 +108,8 @@ public class TestClientScanner {
       RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
       throws IOException {
       super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
-        primaryOperationTimeout);
+        HConstants.DEFAULT_HBASE_RPC_TIMEOUT,
+        HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, primaryOperationTimeout);
     }
 
     @Override
@@ -500,7 +502,7 @@ public class TestClientScanner {
     }
 
     @Override
-    public <T> RpcRetryingCaller<T> newCaller() {
+    public <T> RpcRetryingCaller<T> newCaller(int rpcTimeout) {
       return new RpcRetryingCaller<T>() {
         @Override
         public void cancel() {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerRPCTimeout.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerRPCTimeout.java
deleted file mode 100644
index 649fce1c750..00000000000
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerRPCTimeout.java
+++ /dev/null
@@ -1,198 +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.hadoop.hbase.client;
-
-import static org.junit.Assert.assertTrue;
-
-import java.io.IOException;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.HBaseClassTestRule;
-import org.apache.hadoop.hbase.HBaseTestingUtility;
-import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.MiniHBaseCluster.MiniHBaseClusterRegionServer;
-import org.apache.hadoop.hbase.TableName;
-import org.apache.hadoop.hbase.regionserver.HRegionServer;
-import org.apache.hadoop.hbase.regionserver.RSRpcServices;
-import org.apache.hadoop.hbase.testclassification.ClientTests;
-import org.apache.hadoop.hbase.testclassification.MediumTests;
-import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
-import org.junit.AfterClass;
-import org.junit.BeforeClass;
-import org.junit.ClassRule;
-import org.junit.Rule;
-import org.junit.Test;
-import org.junit.experimental.categories.Category;
-import org.junit.rules.TestName;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;
-import org.apache.hbase.thirdparty.com.google.protobuf.ServiceException;
-
-import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;
-
-/**
- * Test the scenario where a HRegionServer#scan() call, while scanning, timeout at client side and
- * getting retried. This scenario should not result in some data being skipped at RS side.
- */
-@Category({ MediumTests.class, ClientTests.class })
-public class TestClientScannerRPCTimeout {
-
-  @ClassRule
-  public static final HBaseClassTestRule CLASS_RULE =
-    HBaseClassTestRule.forClass(TestClientScannerRPCTimeout.class);
-
-  private static final Logger LOG = LoggerFactory.getLogger(TestClientScannerRPCTimeout.class);
-  private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
-  private static final byte[] FAMILY = Bytes.toBytes("testFamily");
-  private static final byte[] QUALIFIER = Bytes.toBytes("testQualifier");
-  private static final byte[] VALUE = Bytes.toBytes("testValue");
-  private static final int rpcTimeout = 2 * 1000;
-  private static final int CLIENT_RETRIES_NUMBER = 3;
-
-  @Rule
-  public TestName name = new TestName();
-
-  @BeforeClass
-  public static void setUpBeforeClass() throws Exception {
-    Configuration conf = TEST_UTIL.getConfiguration();
-    // Don't report so often so easier to see other rpcs
-    conf.setInt("hbase.regionserver.msginterval", 3 * 10000);
-    conf.setInt(HConstants.HBASE_RPC_TIMEOUT_KEY, rpcTimeout);
-    conf.setStrings(HConstants.REGION_SERVER_IMPL, RegionServerWithScanTimeout.class.getName());
-    conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, CLIENT_RETRIES_NUMBER);
-    conf.setInt(HConstants.HBASE_CLIENT_PAUSE, 1000);
-    TEST_UTIL.startMiniCluster(1);
-  }
-
-  @AfterClass
-  public static void tearDownAfterClass() throws Exception {
-    TEST_UTIL.shutdownMiniCluster();
-  }
-
-  @Test
-  public void testScannerNextRPCTimesout() throws Exception {
-    final TableName tableName = TableName.valueOf(name.getMethodName());
-    Table ht = TEST_UTIL.createTable(tableName, FAMILY);
-    byte[] r0 = Bytes.toBytes("row-0");
-    byte[] r1 = Bytes.toBytes("row-1");
-    byte[] r2 = Bytes.toBytes("row-2");
-    byte[] r3 = Bytes.toBytes("row-3");
-    putToTable(ht, r0);
-    putToTable(ht, r1);
-    putToTable(ht, r2);
-    putToTable(ht, r3);
-    LOG.info("Wrote our three values");
-    RSRpcServicesWithScanTimeout.seqNoToSleepOn = 1;
-    Scan scan = new Scan();
-    scan.setCaching(1);
-    ResultScanner scanner = ht.getScanner(scan);
-    Result result = scanner.next();
-    // fetched when openScanner
-    assertTrue("Expected row: row-0", Bytes.equals(r0, result.getRow()));
-    result = scanner.next();
-    assertTrue("Expected row: row-1", Bytes.equals(r1, result.getRow()));
-    LOG.info("Got expected first row");
-    long t1 = EnvironmentEdgeManager.currentTime();
-    result = scanner.next();
-    assertTrue((EnvironmentEdgeManager.currentTime() - t1) > rpcTimeout);
-    assertTrue("Expected row: row-2", Bytes.equals(r2, result.getRow()));
-    RSRpcServicesWithScanTimeout.seqNoToSleepOn = -1;// No need of sleep
-    result = scanner.next();
-    assertTrue("Expected row: row-3", Bytes.equals(r3, result.getRow()));
-    scanner.close();
-
-    // test the case that RPC is always timesout
-    scanner = ht.getScanner(scan);
-    RSRpcServicesWithScanTimeout.sleepAlways = true;
-    RSRpcServicesWithScanTimeout.tryNumber = 0;
-    try {
-      result = scanner.next();
-    } catch (IOException ioe) {
-      // catch the exception after max retry number
-      LOG.info("Failed after maximal attempts=" + CLIENT_RETRIES_NUMBER, ioe);
-    }
-    assertTrue(
-      "Expected maximal try number=" + CLIENT_RETRIES_NUMBER + ", actual ="
-        + RSRpcServicesWithScanTimeout.tryNumber,
-      RSRpcServicesWithScanTimeout.tryNumber <= CLIENT_RETRIES_NUMBER);
-  }
-
-  private void putToTable(Table ht, byte[] rowkey) throws IOException {
-    Put put = new Put(rowkey);
-    put.addColumn(FAMILY, QUALIFIER, VALUE);
-    ht.put(put);
-  }
-
-  private static class RegionServerWithScanTimeout extends MiniHBaseClusterRegionServer {
-    public RegionServerWithScanTimeout(Configuration conf)
-      throws IOException, InterruptedException {
-      super(conf);
-    }
-
-    @Override
-    protected RSRpcServices createRpcServices() throws IOException {
-      return new RSRpcServicesWithScanTimeout(this);
-    }
-  }
-
-  private static class RSRpcServicesWithScanTimeout extends RSRpcServices {
-    private long tableScannerId;
-    private boolean slept;
-    private static long seqNoToSleepOn = -1;
-    private static boolean sleepAlways = false;
-    private static int tryNumber = 0;
-
-    public RSRpcServicesWithScanTimeout(HRegionServer rs) throws IOException {
-      super(rs);
-    }
-
-    @Override
-    public ScanResponse scan(final RpcController controller, final ScanRequest request)
-      throws ServiceException {
-      if (request.hasScannerId()) {
-        ScanResponse scanResponse = super.scan(controller, request);
-        if (
-          this.tableScannerId == request.getScannerId()
-            && (sleepAlways || (!slept && seqNoToSleepOn == request.getNextCallSeq()))
-        ) {
-          try {
-            LOG.info("SLEEPING " + (rpcTimeout + 500));
-            Thread.sleep(rpcTimeout + 500);
-          } catch (InterruptedException e) {
-          }
-          slept = true;
-          tryNumber++;
-          if (tryNumber > 2 * CLIENT_RETRIES_NUMBER) {
-            sleepAlways = false;
-          }
-        }
-        return scanResponse;
-      } else {
-        ScanResponse scanRes = super.scan(controller, request);
-        String regionName = Bytes.toString(request.getRegion().getValue().toByteArray());
-        if (!regionName.contains(TableName.META_TABLE_NAME.getNameAsString())) {
-          tableScannerId = scanRes.getScannerId();
-        }
-        return scanRes;
-      }
-    }
-  }
-}
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerTimeouts.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerTimeouts.java
new file mode 100644
index 00000000000..2bff2297ff5
--- /dev/null
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerTimeouts.java
@@ -0,0 +1,488 @@
+/*
+ * 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.hadoop.hbase.client;
+
+import static org.apache.hadoop.hbase.client.ConnectionConfiguration.HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY;
+import static org.apache.hadoop.hbase.client.ConnectionConfiguration.HBASE_CLIENT_META_SCANNER_TIMEOUT;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.io.IOException;
+import java.net.SocketTimeoutException;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Supplier;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.MiniHBaseCluster;
+import org.apache.hadoop.hbase.NamespaceDescriptor;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
+import org.apache.hadoop.hbase.ipc.CallTimeoutException;
+import org.apache.hadoop.hbase.regionserver.HRegionServer;
+import org.apache.hadoop.hbase.regionserver.RSRpcServices;
+import org.apache.hadoop.hbase.testclassification.ClientTests;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.rules.TestName;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;
+import org.apache.hbase.thirdparty.com.google.protobuf.ServiceException;
+
+import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;
+
+@Category({ MediumTests.class, ClientTests.class })
+public class TestClientScannerTimeouts {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestClientScannerTimeouts.class);
+
+  private static final Logger LOG = LoggerFactory.getLogger(TestClientScannerTimeouts.class);
+  private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
+
+  private static AsyncConnection ASYNC_CONN;
+  private static Connection CONN;
+  private static final byte[] FAMILY = Bytes.toBytes("testFamily");
+  private static final byte[] QUALIFIER = Bytes.toBytes("testQualifier");
+  private static final byte[] VALUE = Bytes.toBytes("testValue");
+
+  private static final byte[] ROW0 = Bytes.toBytes("row-0");
+  private static final byte[] ROW1 = Bytes.toBytes("row-1");
+  private static final byte[] ROW2 = Bytes.toBytes("row-2");
+  private static final byte[] ROW3 = Bytes.toBytes("row-3");
+  private static final int rpcTimeout = 1000;
+  private static final int scanTimeout = 3 * rpcTimeout;
+  private static final int metaScanTimeout = 6 * rpcTimeout;
+  private static final int CLIENT_RETRIES_NUMBER = 3;
+
+  private static TableName tableName;
+
+  @Rule
+  public TestName name = new TestName();
+
+  @BeforeClass
+  public static void setUpBeforeClass() throws Exception {
+    Configuration conf = TEST_UTIL.getConfiguration();
+    // Don't report so often so easier to see other rpcs
+    conf.setInt("hbase.regionserver.msginterval", 3 * 10000);
+    conf.setInt(HConstants.HBASE_RPC_TIMEOUT_KEY, rpcTimeout);
+    conf.setStrings(HConstants.REGION_SERVER_IMPL, RegionServerWithScanTimeout.class.getName());
+    conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, CLIENT_RETRIES_NUMBER);
+    conf.setInt(HConstants.HBASE_CLIENT_PAUSE, 1000);
+    TEST_UTIL.startMiniCluster(1);
+
+    conf.setInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, scanTimeout);
+    conf.setInt(HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY, metaScanTimeout);
+    conf.setInt(HBASE_CLIENT_META_SCANNER_TIMEOUT, metaScanTimeout);
+    ASYNC_CONN = ConnectionFactory.createAsyncConnection(conf).get();
+    CONN = ConnectionFactory.createConnection(conf);
+  }
+
+  @AfterClass
+  public static void tearDownAfterClass() throws Exception {
+    CONN.close();
+    ASYNC_CONN.close();
+    TEST_UTIL.shutdownMiniCluster();
+  }
+
+  public void setup(boolean isSystemTable) throws IOException {
+    RSRpcServicesWithScanTimeout.reset();
+
+    String nameAsString = name.getMethodName();
+    if (isSystemTable) {
+      nameAsString = NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR + ":" + nameAsString;
+    }
+    tableName = TableName.valueOf(nameAsString);
+    TEST_UTIL.createTable(tableName, FAMILY);
+
+    Table table = CONN.getTable(tableName);
+    putToTable(table, ROW0);
+    putToTable(table, ROW1);
+    putToTable(table, ROW2);
+    putToTable(table, ROW3);
+    LOG.info("Wrote our four values");
+
+    table.getRegionLocator().getAllRegionLocations();
+
+    // reset again incase the creation/population caused anything to trigger
+    RSRpcServicesWithScanTimeout.reset();
+  }
+
+  private void expectRow(byte[] expected, Result result) {
+    assertTrue("Expected row: " + Bytes.toString(expected),
+      Bytes.equals(expected, result.getRow()));
+  }
+
+  private void expectNumTries(int expected) {
+    assertEquals(
+      "Expected tryNumber=" + expected + ", actual=" + RSRpcServicesWithScanTimeout.tryNumber,
+      expected, RSRpcServicesWithScanTimeout.tryNumber);
+    // reset for next
+    RSRpcServicesWithScanTimeout.tryNumber = 0;
+  }
+
+  /**
+   * verify that we don't miss any data when encountering an OutOfOrderScannerNextException.
+   * Typically, the only way to naturally trigger this is if a client-side timeout causes an
+   * erroneous next() call. This is relatively hard to do these days because the server attempts to
+   * always return before the timeout. In this test we force the server to throw this exception, so
+   * that we can test the retry logic appropriately.
+   */
+  @Test
+  public void testRetryOutOfOrderScannerNextException() throws IOException {
+    expectRetryOutOfOrderScannerNext(() -> getScanner(CONN));
+  }
+
+  /**
+   * AsyncTable version of above
+   */
+  @Test
+  public void testRetryOutOfOrderScannerNextExceptionAsync() throws IOException {
+    expectRetryOutOfOrderScannerNext(this::getAsyncScanner);
+  }
+
+  /**
+   * verify that we honor the {@link HConstants#HBASE_RPC_READ_TIMEOUT_KEY} for normal scans. Use a
+   * special connection which has retries disabled, because otherwise the scanner will retry the
+   * timed out next() call and mess up the test.
+   */
+  @Test
+  public void testNormalScanTimeoutOnNext() throws IOException {
+    setup(false);
+    // Unlike AsyncTable, Table's ResultScanner.next() call uses rpcTimeout and
+    // will retry until scannerTimeout. This makes it more difficult to test the timeouts
+    // of normal next() calls. So we use a separate connection here which has retries disabled.
+    Configuration confNoRetries = new Configuration(CONN.getConfiguration());
+    confNoRetries.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 0);
+    try (Connection conn = ConnectionFactory.createConnection(confNoRetries)) {
+      expectTimeoutOnNext(rpcTimeout, () -> getScanner(conn));
+    }
+  }
+
+  /**
+   * AsyncTable version of above
+   */
+  @Test
+  public void testNormalScanTimeoutOnNextAsync() throws IOException {
+    setup(false);
+    expectTimeoutOnNext(scanTimeout, this::getAsyncScanner);
+  }
+
+  /**
+   * verify that we honor {@link HConstants#HBASE_RPC_READ_TIMEOUT_KEY} for openScanner() calls for
+   * meta scans
+   */
+  @Test
+  public void testNormalScanTimeoutOnOpenScanner() throws IOException {
+    setup(false);
+    expectTimeoutOnOpenScanner(rpcTimeout, this::getScanner);
+  }
+
+  /**
+   * AsyncTable version of above
+   */
+  @Test
+  public void testNormalScanTimeoutOnOpenScannerAsync() throws IOException {
+    setup(false);
+    expectTimeoutOnOpenScanner(rpcTimeout, this::getAsyncScanner);
+  }
+
+  /**
+   * verify that we honor {@link ConnectionConfiguration#HBASE_CLIENT_META_SCANNER_TIMEOUT} for
+   * next() calls in meta scans
+   */
+  @Test
+  public void testMetaScanTimeoutOnNext() throws IOException {
+    setup(true);
+    expectTimeoutOnNext(metaScanTimeout, this::getScanner);
+  }
+
+  /**
+   * AsyncTable version of above
+   */
+  @Test
+  public void testMetaScanTimeoutOnNextAsync() throws IOException {
+    setup(true);
+    expectTimeoutOnNext(metaScanTimeout, this::getAsyncScanner);
+  }
+
+  /**
+   * verify that we honor {@link ConnectionConfiguration#HBASE_CLIENT_META_READ_RPC_TIMEOUT_KEY} for
+   * openScanner() calls for meta scans
+   */
+  @Test
+  public void testMetaScanTimeoutOnOpenScanner() throws IOException {
+    setup(true);
+    expectTimeoutOnOpenScanner(metaScanTimeout, this::getScanner);
+  }
+
+  /**
+   * AsyncTable version of above
+   */
+  @Test
+  public void testMetaScanTimeoutOnOpenScannerAsync() throws IOException {
+    setup(true);
+    expectTimeoutOnOpenScanner(metaScanTimeout, this::getAsyncScanner);
+  }
+
+  private void expectRetryOutOfOrderScannerNext(Supplier<ResultScanner> scannerSupplier)
+    throws IOException {
+    setup(false);
+    RSRpcServicesWithScanTimeout.seqNoToThrowOn = 1;
+
+    LOG.info(
+      "Opening scanner, expecting no errors from first next() call from openScanner response");
+    ResultScanner scanner = scannerSupplier.get();
+    Result result = scanner.next();
+    expectRow(ROW0, result);
+    expectNumTries(0);
+
+    LOG.info("Making first next() RPC, expecting no errors for seqNo 0");
+    result = scanner.next();
+    expectRow(ROW1, result);
+    expectNumTries(0);
+
+    LOG.info(
+      "Making second next() RPC, expecting OutOfOrderScannerNextException and appropriate retry");
+    result = scanner.next();
+    expectRow(ROW2, result);
+    expectNumTries(1);
+
+    // reset so no errors. since last call restarted the scan and following
+    // call would otherwise fail
+    RSRpcServicesWithScanTimeout.seqNoToThrowOn = -1;
+
+    LOG.info("Finishing scan, expecting no errors");
+    result = scanner.next();
+    expectRow(ROW3, result);
+    scanner.close();
+
+    LOG.info("Testing always throw exception");
+    byte[][] expectedResults = new byte[][] { ROW0, ROW1, ROW2, ROW3 };
+    int i = 0;
+
+    // test the case that RPC always throws
+    scanner = scannerSupplier.get();
+    RSRpcServicesWithScanTimeout.throwAlways = true;
+
+    while (true) {
+      LOG.info("Calling scanner.next()");
+      result = scanner.next();
+      if (result == null) {
+        break;
+      } else {
+        byte[] expectedResult = expectedResults[i++];
+        expectRow(expectedResult, result);
+      }
+    }
+
+    // ensure we verified all rows. this along with the expectRow check above
+    // proves that we didn't miss any rows.
+    assertEquals("Expected to exhaust expectedResults array length=" + expectedResults.length
+      + ", actual index=" + i, expectedResults.length, i);
+
+    // expect all but the first row (which came from initial openScanner) to have thrown an error
+    expectNumTries(expectedResults.length - 1);
+
+  }
+
+  private void expectTimeoutOnNext(int timeout, Supplier<ResultScanner> scannerSupplier)
+    throws IOException {
+    RSRpcServicesWithScanTimeout.seqNoToSleepOn = 1;
+    RSRpcServicesWithScanTimeout.setSleepForTimeout(timeout);
+
+    LOG.info(
+      "Opening scanner, expecting no timeouts from first next() call from openScanner response");
+    ResultScanner scanner = scannerSupplier.get();
+    Result result = scanner.next();
+    expectRow(ROW0, result);
+
+    LOG.info("Making first next() RPC, expecting no timeout for seqNo 0");
+    result = scanner.next();
+    expectRow(ROW1, result);
+
+    LOG.info("Making second next() RPC, expecting timeout");
+    long start = System.nanoTime();
+    try {
+      scanner.next();
+      fail("Expected CallTimeoutException");
+    } catch (RetriesExhaustedException e) {
+      assertTrue("Expected CallTimeoutException", e.getCause() instanceof CallTimeoutException
+        || e.getCause() instanceof SocketTimeoutException);
+    }
+    expectTimeout(start, timeout);
+  }
+
+  private void expectTimeoutOnOpenScanner(int timeout, Supplier<ResultScanner> scannerSupplier)
+    throws IOException {
+    RSRpcServicesWithScanTimeout.setSleepForTimeout(timeout);
+    RSRpcServicesWithScanTimeout.sleepOnOpen = true;
+    LOG.info("Opening scanner, expecting timeout from first next() call from openScanner response");
+    long start = System.nanoTime();
+    try {
+      scannerSupplier.get().next();
+      fail("Expected SocketTimeoutException or CallTimeoutException");
+    } catch (RetriesExhaustedException e) {
+      LOG.info("Got error", e);
+      assertTrue("Expected SocketTimeoutException or CallTimeoutException, but was " + e.getCause(),
+        e.getCause() instanceof CallTimeoutException
+          || e.getCause() instanceof SocketTimeoutException);
+    }
+    expectTimeout(start, timeout);
+  }
+
+  private void expectTimeout(long start, int timeout) {
+    long duration = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
+    LOG.info("Expected duration >= {}, and got {}", timeout, duration);
+    assertTrue("Expected duration >= " + timeout + ", but was " + duration, duration >= timeout);
+  }
+
+  private ResultScanner getScanner() {
+    return getScanner(CONN);
+  }
+
+  private ResultScanner getScanner(Connection conn) {
+    Scan scan = new Scan();
+    scan.setCaching(1);
+    try {
+      return conn.getTable(tableName).getScanner(scan);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  private ResultScanner getAsyncScanner() {
+    Scan scan = new Scan();
+    scan.setCaching(1);
+    return ASYNC_CONN.getTable(tableName).getScanner(scan);
+  }
+
+  private void putToTable(Table ht, byte[] rowkey) throws IOException {
+    Put put = new Put(rowkey);
+    put.addColumn(FAMILY, QUALIFIER, VALUE);
+    ht.put(put);
+  }
+
+  private static class RegionServerWithScanTimeout
+    extends MiniHBaseCluster.MiniHBaseClusterRegionServer {
+    public RegionServerWithScanTimeout(Configuration conf)
+      throws IOException, InterruptedException {
+      super(conf);
+    }
+
+    @Override
+    protected RSRpcServices createRpcServices() throws IOException {
+      return new RSRpcServicesWithScanTimeout(this);
+    }
+  }
+
+  private static class RSRpcServicesWithScanTimeout extends RSRpcServices {
+    private long tableScannerId;
+
+    private static long seqNoToThrowOn = -1;
+    private static boolean throwAlways = false;
+    private static boolean threw;
+
+    private static long seqNoToSleepOn = -1;
+    private static boolean sleepOnOpen = false;
+    private static volatile boolean slept;
+    private static int tryNumber = 0;
+
+    private static int sleepTime = rpcTimeout + 500;
+
+    public static void setSleepForTimeout(int timeout) {
+      sleepTime = timeout + 500;
+    }
+
+    public static void reset() {
+      setSleepForTimeout(scanTimeout);
+
+      seqNoToSleepOn = -1;
+      seqNoToThrowOn = -1;
+      throwAlways = false;
+      threw = false;
+      sleepOnOpen = false;
+      slept = false;
+      tryNumber = 0;
+    }
+
+    public RSRpcServicesWithScanTimeout(HRegionServer rs) throws IOException {
+      super(rs);
+    }
+
+    @Override
+    public ScanResponse scan(final RpcController controller, final ScanRequest request)
+      throws ServiceException {
+      if (request.hasScannerId()) {
+        LOG.info("Got request {}", request);
+        ScanResponse scanResponse = super.scan(controller, request);
+        if (tableScannerId != request.getScannerId() || request.getCloseScanner()) {
+          return scanResponse;
+        }
+
+        if (
+          throwAlways
+            || (!threw && request.hasNextCallSeq() && seqNoToThrowOn == request.getNextCallSeq())
+        ) {
+          threw = true;
+          tryNumber++;
+          LOG.info("THROWING exception, tryNumber={}, tableScannerId={}", tryNumber,
+            tableScannerId);
+          throw new ServiceException(new OutOfOrderScannerNextException());
+        }
+
+        if (!slept && request.hasNextCallSeq() && seqNoToSleepOn == request.getNextCallSeq()) {
+          try {
+            LOG.info("SLEEPING " + sleepTime);
+            Thread.sleep(sleepTime);
+          } catch (InterruptedException e) {
+          }
+          slept = true;
+          tryNumber++;
+        }
+        return scanResponse;
+      } else {
+        ScanResponse scanRes = super.scan(controller, request);
+        String regionName = Bytes.toString(request.getRegion().getValue().toByteArray());
+        if (!regionName.contains(TableName.META_TABLE_NAME.getNameAsString())) {
+          tableScannerId = scanRes.getScannerId();
+          if (sleepOnOpen) {
+            try {
+              LOG.info("openScanner SLEEPING " + sleepTime);
+              Thread.sleep(sleepTime);
+            } catch (InterruptedException e) {
+            }
+          }
+        }
+        return scanRes;
+      }
+    }
+  }
+}
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerHeartbeatMessages.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerHeartbeatMessages.java
index d9b1314b09c..f5debcb627a 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerHeartbeatMessages.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerHeartbeatMessages.java
@@ -41,6 +41,8 @@ import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.HTestConst;
 import org.apache.hadoop.hbase.KeyValue;
 import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.RegionInfo;
 import org.apache.hadoop.hbase.client.Result;
@@ -90,6 +92,7 @@ public class TestScannerHeartbeatMessages {
   private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
 
   private static Table TABLE = null;
+  private static Connection CONN = null;
 
   /**
    * Table configuration
@@ -133,6 +136,7 @@ public class TestScannerHeartbeatMessages {
 
     conf.setStrings(HConstants.REGION_IMPL, HeartbeatHRegion.class.getName());
     conf.setStrings(HConstants.REGION_SERVER_IMPL, HeartbeatHRegionServer.class.getName());
+    // setting these here for usage on the server side. will override for client side below
     conf.setInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, SERVER_TIMEOUT);
     conf.setInt(HConstants.HBASE_RPC_TIMEOUT_KEY, SERVER_TIMEOUT);
     conf.setInt(HConstants.HBASE_CLIENT_PAUSE, 1);
@@ -141,6 +145,10 @@ public class TestScannerHeartbeatMessages {
     conf.setLong(StoreScanner.HBASE_CELLS_SCANNED_PER_HEARTBEAT_CHECK, 1);
     TEST_UTIL.startMiniCluster(1);
 
+    // set client timeout for client side, we want it to be less than server side.
+    Configuration clientConf = new Configuration(conf);
+    clientConf.setInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, CLIENT_TIMEOUT);
+    CONN = ConnectionFactory.createConnection(clientConf);
     TABLE = createTestTable(TABLE_NAME, ROWS, FAMILIES, QUALIFIERS, VALUE);
   }
 
@@ -180,10 +188,10 @@ public class TestScannerHeartbeatMessages {
 
   static Table createTestTable(TableName name, byte[][] rows, byte[][] families,
     byte[][] qualifiers, byte[] cellValue) throws IOException {
-    Table ht = TEST_UTIL.createTable(name, families);
+    TEST_UTIL.createTable(name, families);
+    Table ht = CONN.getTable(name);
     List<Put> puts = createPuts(rows, families, qualifiers, cellValue);
     ht.put(puts);
-    ht.getConfiguration().setInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, CLIENT_TIMEOUT);
     return ht;
   }
 
@@ -211,6 +219,7 @@ public class TestScannerHeartbeatMessages {
 
   @AfterClass
   public static void tearDownAfterClass() throws Exception {
+    CONN.close();
     TEST_UTIL.shutdownMiniCluster();
   }