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Posted to commits@druid.apache.org by gi...@apache.org on 2024/12/18 16:29:17 UTC

(druid) branch master updated: Revert "Add back `UnnecessaryFullyQualifiedName` rule in pmd ruleset (#17570)" (#17584)

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

gian pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/druid.git


The following commit(s) were added to refs/heads/master by this push:
     new 6fad11fe575 Revert "Add back `UnnecessaryFullyQualifiedName` rule in pmd ruleset (#17570)" (#17584)
6fad11fe575 is described below

commit 6fad11fe5752566ddda003f14958460e9892f844
Author: Akshat Jain <ak...@gmail.com>
AuthorDate: Wed Dec 18 21:59:10 2024 +0530

    Revert "Add back `UnnecessaryFullyQualifiedName` rule in pmd ruleset (#17570)" (#17584)
    
    This reverts commit cd6083fb9423260e46876bfb3f4527c3581a9cb9.
---
 codestyle/pmd-ruleset.xml                          |  1 -
 .../org/apache/druid/storage/aliyun/OssUtils.java  |  2 +-
 .../apache/druid/compressedbigdecimal/Utils.java   |  2 +-
 .../druid/k8s/overlord/common/PeonPhase.java       |  2 +-
 .../RabbitStreamSupervisorTuningConfig.java        |  4 +-
 .../datasketches/hll/HllSketchHolder.java          | 10 ++--
 .../datasketches/theta/SketchHolder.java           | 20 +++----
 .../druid/security/basic/BasicAuthUtils.java       |  6 +-
 .../org/apache/druid/catalog/CatalogException.java |  2 +-
 .../druid/storage/hdfs/HdfsStorageDruidModule.java |  6 +-
 .../supervisor/KafkaSupervisorTuningConfig.java    |  2 +-
 .../druid/k8s/discovery/DefaultK8sApiClient.java   |  4 +-
 .../druid/k8s/discovery/K8sDruidNodeAnnouncer.java | 10 ++--
 .../SegmentGeneratorFrameProcessorFactory.java     |  4 +-
 .../apache/druid/msq/querykit/QueryKitUtils.java   | 18 +++---
 .../java/org/apache/druid/msq/sql/MSQMode.java     |  6 +-
 .../java/org/apache/druid/storage/s3/S3Utils.java  |  4 +-
 .../druid/indexer/DeterminePartitionsJob.java      |  2 +-
 .../druid/indexer/HadoopDruidIndexerConfig.java    | 14 ++---
 .../apache/druid/indexer/HadoopTuningConfig.java   |  4 +-
 .../java/org/apache/druid/indexer/JobHelper.java   | 10 ++--
 .../indexer/hadoop/DatasourceInputFormat.java      |  2 +-
 .../common/task/AbstractBatchIndexTask.java        |  4 +-
 .../indexing/common/task/HadoopIndexTask.java      |  4 +-
 .../druid/indexing/common/task/IndexTask.java      | 17 +++---
 .../druid/indexing/common/task/IndexTaskUtils.java |  4 +-
 .../batch/parallel/LegacySinglePhaseSubTask.java   |  2 +-
 .../parallel/PartialDimensionCardinalityTask.java  |  3 +-
 .../parallel/PartialDimensionDistributionTask.java |  3 +-
 .../batch/parallel/PartialSegmentMergeTask.java    |  3 +-
 .../task/batch/parallel/SinglePhaseSubTask.java    |  6 +-
 .../druid/indexing/input/DruidInputSource.java     |  4 +-
 .../overlord/QuotableWhiteSpaceSplitter.java       |  2 +-
 .../SeekableStreamIndexTaskTuningConfig.java       |  7 ++-
 .../druid/testing/tools/CliCustomNodeRole.java     |  8 +--
 .../org/apache/druid/cli/CliCustomNodeRole.java    |  8 +--
 .../utils/AvroSchemaRegistryEventSerializer.java   |  2 +-
 .../ProtobufSchemaRegistryEventSerializer.java     |  2 +-
 .../collections/spatial/search/PolygonBound.java   |  2 +-
 .../apache/druid/common/config/NullHandling.java   |  6 +-
 .../org/apache/druid/common/guava/FutureUtils.java |  6 +-
 .../org/apache/druid/common/utils/IdUtils.java     |  2 +-
 .../druid/data/input/impl/DimensionsSpec.java      |  2 +-
 .../data/input/impl/DoubleDimensionSchema.java     |  2 +-
 .../data/input/impl/FloatDimensionSchema.java      |  2 +-
 .../druid/data/input/impl/LongDimensionSchema.java |  2 +-
 .../data/input/impl/NewSpatialDimensionSchema.java |  2 +-
 .../data/input/impl/StringDimensionSchema.java     |  2 +-
 .../extendedset/intset/ImmutableConciseSet.java    |  2 +-
 .../main/java/org/apache/druid/frame/Frame.java    |  4 +-
 .../org/apache/druid/frame/key/RowKeyReader.java   |  2 +-
 .../druid/frame/processor/OutputChannel.java       |  2 +-
 .../druid/frame/util/DurableStorageUtils.java      |  2 +-
 .../apache/druid/frame/write/FrameWriterUtils.java |  2 +-
 .../org/apache/druid/hll/HyperLogLogCollector.java |  6 +-
 .../org/apache/druid/indexer/TaskLocation.java     |  2 +-
 .../partitions/DimensionRangePartitionsSpec.java   |  2 +-
 .../indexer/partitions/DynamicPartitionsSpec.java  |  2 +-
 .../indexer/partitions/HashedPartitionsSpec.java   |  2 +-
 .../org/apache/druid/java/util/common/Either.java  |  2 +-
 .../druid/java/util/common/HumanReadableBytes.java |  2 +-
 .../apache/druid/java/util/common/StringUtils.java | 14 ++---
 .../util/common/granularity/Granularities.java     |  2 +-
 .../util/common/granularity/GranularityType.java   | 30 +++++-----
 .../druid/java/util/common/guava/Sequences.java    |  2 +-
 .../util/common/parsers/JSONPathFieldSpec.java     |  2 +-
 .../java/util/common/parsers/ParserUtils.java      |  2 +-
 .../java/util/emitter/core/HttpPostEmitter.java    |  4 +-
 .../java/util/emitter/service/AlertBuilder.java    |  2 +-
 .../java/org/apache/druid/math/expr/Evals.java     |  6 +-
 .../java/org/apache/druid/math/expr/ExprEval.java  | 70 +++++++++++-----------
 .../org/apache/druid/math/expr/ExprMacroTable.java |  2 +-
 .../java/org/apache/druid/math/expr/ExprType.java  |  2 +-
 .../org/apache/druid/math/expr/ExpressionType.java |  2 +-
 .../druid/math/expr/ExpressionTypeConversion.java  |  2 +-
 .../java/org/apache/druid/math/expr/Parser.java    |  2 +-
 .../org/apache/druid/query/JoinDataSource.java     |  2 +-
 .../druid/query/aggregation/AggregatorUtil.java    |  4 +-
 .../any/StringAnyAggregatorFactory.java            |  2 +-
 .../first/StringFirstAggregatorFactory.java        |  2 +-
 .../aggregation/post/ArithmeticPostAggregator.java |  2 +-
 .../DataSourceMetadataQuery.java                   |  2 +-
 .../org/apache/druid/query/filter/InDimFilter.java |  2 +-
 .../apache/druid/query/groupby/GroupByQuery.java   |  2 +-
 .../apache/druid/query/groupby/GroupingEngine.java |  2 +-
 .../org/apache/druid/query/groupby/ResultRow.java  |  2 +-
 .../epinephelinae/RowBasedGrouperHelper.java       |  2 +-
 .../query/groupby/orderby/OrderByColumnSpec.java   |  4 +-
 .../query/metadata/metadata/ColumnAnalysis.java    |  6 +-
 .../metadata/metadata/SegmentMetadataQuery.java    |  2 +-
 .../druid/query/operator/WindowOperatorQuery.java  |  2 +-
 .../druid/query/ordering/StringComparators.java    | 14 ++---
 .../rowsandcols/MapOfColumnsRowsAndColumns.java    |  2 +-
 .../org/apache/druid/query/search/SearchQuery.java |  2 +-
 .../query/timeboundary/TimeBoundaryQuery.java      |  2 +-
 .../druid/query/timeseries/TimeseriesQuery.java    |  2 +-
 .../druid/query/topn/PooledTopNAlgorithm.java      |  8 +--
 .../druid/segment/AutoTypeColumnIndexer.java       |  4 +-
 .../druid/segment/DimensionHandlerUtils.java       |  4 +-
 .../org/apache/druid/segment/IndexMergerV9.java    |  2 +-
 .../java/org/apache/druid/segment/IndexSpec.java   |  2 +-
 .../druid/segment/NestedDataColumnIndexerV4.java   |  2 +-
 .../segment/RowBasedColumnSelectorFactory.java     |  2 +-
 .../druid/segment/column/ColumnCapabilities.java   |  4 +-
 .../segment/column/ColumnCapabilitiesImpl.java     |  2 +-
 .../apache/druid/segment/column/ColumnType.java    | 18 +++---
 .../org/apache/druid/segment/column/ValueType.java |  6 +-
 .../druid/segment/data/CompressionFactory.java     |  2 +-
 .../druid/segment/data/CompressionStrategy.java    |  4 +-
 .../druid/segment/data/FrontCodedIndexed.java      |  6 +-
 .../org/apache/druid/segment/data/Indexed.java     |  2 +-
 .../org/apache/druid/segment/filter/Filters.java   |  4 +-
 .../apache/druid/segment/filter/ValueMatchers.java |  2 +-
 .../segment/index/IndexedUtf8ValueIndexes.java     |  2 +-
 .../apache/druid/segment/nested/FieldTypeInfo.java |  2 +-
 .../nested/NestedCommonFormatColumnSerializer.java |  2 +-
 .../nested/NestedFieldColumnIndexSupplier.java     |  6 +-
 .../nested/ScalarDoubleColumnAndIndexSupplier.java |  4 +-
 .../nested/ScalarLongColumnAndIndexSupplier.java   |  4 +-
 .../serde/DictionaryEncodedColumnPartSerde.java    |  2 +-
 .../ExpressionMultiValueDimensionSelector.java     |  2 +-
 ...erredEvaluationExpressionDimensionSelector.java |  3 +-
 ...valuationExpressionDimensionVectorSelector.java |  3 +-
 ...posedAsBrokerQueryComponentSupplierWrapper.java |  2 +-
 .../org/apache/druid/quidem/QuidemRecorder.java    |  6 +-
 .../apache/druid/catalog/model/CatalogUtils.java   |  4 +-
 .../druid/catalog/model/table/DatasourceDefn.java  |  2 +-
 .../discovery/DruidNodeDiscoveryProvider.java      |  2 +-
 .../java/org/apache/druid/guice/DruidBinders.java  |  2 +-
 .../java/org/apache/druid/metadata/SortOrder.java  |  4 +-
 .../druid/rpc/guice/ServiceClientModule.java       |  2 +-
 .../druid/server/compaction/CompactionStatus.java  | 24 ++++----
 .../BroadcastDatasourceLoadingSpec.java            |  2 +-
 .../druid/server/coordination/ServerType.java      |  6 +-
 .../balancer/SegmentToMoveCalculator.java          |  6 +-
 .../druid/server/http/HostAndPortWithScheme.java   |  4 +-
 .../jetty/StandardResponseHeaderFilterHolder.java  |  2 +-
 .../server/lookup/cache/LookupLoadingSpec.java     |  2 +-
 .../druid/server/metrics/MonitorsConfig.java       |  4 +-
 .../druid/server/security/AuthorizationUtils.java  |  4 +-
 .../calcite/plan/volcano/DruidVolcanoCost.java     |  8 +--
 .../aggregation/builtin/MaxSqlAggregator.java      |  2 +-
 .../aggregation/builtin/MinSqlAggregator.java      |  2 +-
 .../aggregation/builtin/SumSqlAggregator.java      |  2 +-
 .../expression/DefaultOperandTypeChecker.java      |  2 +-
 .../calcite/filtration/ConvertSelectorsToIns.java  |  6 +-
 .../sql/calcite/planner/CalciteRulesManager.java   |  6 +-
 .../apache/druid/sql/calcite/planner/Calcites.java |  6 +-
 .../sql/calcite/planner/DruidOperatorTable.java    |  2 +-
 .../druid/sql/calcite/planner/DruidTypeSystem.java | 28 ++++-----
 .../druid/sql/calcite/planner/PlannerConfig.java   |  2 +-
 .../org/apache/druid/sql/calcite/rel/Grouping.java |  2 +-
 .../org/apache/druid/sql/http/ObjectWriter.java    |  6 +-
 .../org/apache/druid/sql/http/SqlResource.java     |  2 +-
 154 files changed, 374 insertions(+), 362 deletions(-)

diff --git a/codestyle/pmd-ruleset.xml b/codestyle/pmd-ruleset.xml
index f10d4f3da19..7d7285d0a51 100644
--- a/codestyle/pmd-ruleset.xml
+++ b/codestyle/pmd-ruleset.xml
@@ -29,5 +29,4 @@ This ruleset defines the PMD rules for the Apache Druid project.
 
   <rule ref="category/java/codestyle.xml/UnnecessaryImport" />
   <rule ref="category/java/codestyle.xml/TooManyStaticImports" />
-  <rule ref="category/java/codestyle.xml/UnnecessaryFullyQualifiedName"/>
 </ruleset>
diff --git a/extensions-contrib/aliyun-oss-extensions/src/main/java/org/apache/druid/storage/aliyun/OssUtils.java b/extensions-contrib/aliyun-oss-extensions/src/main/java/org/apache/druid/storage/aliyun/OssUtils.java
index 60037389276..fa1b656f0aa 100644
--- a/extensions-contrib/aliyun-oss-extensions/src/main/java/org/apache/druid/storage/aliyun/OssUtils.java
+++ b/extensions-contrib/aliyun-oss-extensions/src/main/java/org/apache/druid/storage/aliyun/OssUtils.java
@@ -227,7 +227,7 @@ public class OssUtils
       throws Exception
   {
     DeleteObjectsRequest deleteRequest = new DeleteObjectsRequest(bucket).withKeys(keysToDelete);
-    retry(() -> {
+    OssUtils.retry(() -> {
       client.deleteObjects(deleteRequest);
       return null;
     });
diff --git a/extensions-contrib/compressed-bigdecimal/src/main/java/org/apache/druid/compressedbigdecimal/Utils.java b/extensions-contrib/compressed-bigdecimal/src/main/java/org/apache/druid/compressedbigdecimal/Utils.java
index b02765f92cc..a214bfd057a 100644
--- a/extensions-contrib/compressed-bigdecimal/src/main/java/org/apache/druid/compressedbigdecimal/Utils.java
+++ b/extensions-contrib/compressed-bigdecimal/src/main/java/org/apache/druid/compressedbigdecimal/Utils.java
@@ -128,7 +128,7 @@ public class Utils
       boolean strictNumberParse
   )
   {
-    CompressedBigDecimal compressedBigDecimal = objToCompressedBigDecimal(obj, strictNumberParse);
+    CompressedBigDecimal compressedBigDecimal = Utils.objToCompressedBigDecimal(obj, strictNumberParse);
 
     if (compressedBigDecimal != null) {
       return scaleIfNeeded(compressedBigDecimal, scale);
diff --git a/extensions-contrib/kubernetes-overlord-extensions/src/main/java/org/apache/druid/k8s/overlord/common/PeonPhase.java b/extensions-contrib/kubernetes-overlord-extensions/src/main/java/org/apache/druid/k8s/overlord/common/PeonPhase.java
index db155269d4f..6efcd34872b 100644
--- a/extensions-contrib/kubernetes-overlord-extensions/src/main/java/org/apache/druid/k8s/overlord/common/PeonPhase.java
+++ b/extensions-contrib/kubernetes-overlord-extensions/src/main/java/org/apache/druid/k8s/overlord/common/PeonPhase.java
@@ -34,7 +34,7 @@ public enum PeonPhase
   UNKNOWN("Unknown"),
   RUNNING("Running");
 
-  private static final Map<String, PeonPhase> PHASE_MAP = Arrays.stream(values())
+  private static final Map<String, PeonPhase> PHASE_MAP = Arrays.stream(PeonPhase.values())
                                                                 .collect(Collectors.toMap(
                                                                     PeonPhase::getPhase,
                                                                     Function.identity()
diff --git a/extensions-contrib/rabbit-stream-indexing-service/src/main/java/org/apache/druid/indexing/rabbitstream/supervisor/RabbitStreamSupervisorTuningConfig.java b/extensions-contrib/rabbit-stream-indexing-service/src/main/java/org/apache/druid/indexing/rabbitstream/supervisor/RabbitStreamSupervisorTuningConfig.java
index 6b864014485..a2667026fff 100644
--- a/extensions-contrib/rabbit-stream-indexing-service/src/main/java/org/apache/druid/indexing/rabbitstream/supervisor/RabbitStreamSupervisorTuningConfig.java
+++ b/extensions-contrib/rabbit-stream-indexing-service/src/main/java/org/apache/druid/indexing/rabbitstream/supervisor/RabbitStreamSupervisorTuningConfig.java
@@ -173,7 +173,9 @@ public class RabbitStreamSupervisorTuningConfig extends RabbitStreamIndexTaskTun
   public Duration getRepartitionTransitionDuration()
   {
     // just return a default for now.
-    return SeekableStreamSupervisorTuningConfig.defaultDuration(null, DEFAULT_REPARTITION_TRANSITION_DURATION);
+    return SeekableStreamSupervisorTuningConfig.defaultDuration(
+        null,
+        SeekableStreamSupervisorTuningConfig.DEFAULT_REPARTITION_TRANSITION_DURATION);
   }
 
   @Override
diff --git a/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchHolder.java b/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchHolder.java
index a79c4a5c4ab..df0b884eaae 100644
--- a/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchHolder.java
+++ b/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchHolder.java
@@ -38,15 +38,15 @@ public class HllSketchHolder
     if (obj instanceof HllSketchHolder) {
       return (HllSketchHolder) obj;
     } else if (obj instanceof HllSketch) {
-      return of((HllSketch) obj);
+      return HllSketchHolder.of((HllSketch) obj);
     } else if (obj instanceof Union) {
-      return of((Union) obj);
+      return HllSketchHolder.of((Union) obj);
     } else if (obj instanceof byte[]) {
-      return of(HllSketch.heapify((byte[]) obj));
+      return HllSketchHolder.of(HllSketch.heapify((byte[]) obj));
     } else if (obj instanceof Memory) {
-      return of(HllSketch.wrap((Memory) obj));
+      return HllSketchHolder.of(HllSketch.wrap((Memory) obj));
     } else if (obj instanceof String) {
-      return of(HllSketch.heapify(StringUtils.decodeBase64(StringUtils.toUtf8((String) obj))));
+      return HllSketchHolder.of(HllSketch.heapify(StringUtils.decodeBase64(StringUtils.toUtf8((String) obj))));
     }
 
     throw new ISE("Object is not of a type[%s] that can be deserialized to sketch.", obj.getClass());
diff --git a/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/theta/SketchHolder.java b/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/theta/SketchHolder.java
index ab8abaf3421..c9229042763 100644
--- a/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/theta/SketchHolder.java
+++ b/extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/theta/SketchHolder.java
@@ -45,7 +45,7 @@ import java.util.Comparator;
  */
 public class SketchHolder
 {
-  public static final SketchHolder EMPTY = of(
+  public static final SketchHolder EMPTY = SketchHolder.of(
       Sketches.updateSketchBuilder()
               .build()
               .compact(true, null)
@@ -195,7 +195,7 @@ public class SketchHolder
       Union union = (Union) SetOperation.builder().setNominalEntries(nomEntries).build(Family.UNION);
       holder1.updateUnion(union);
       holder2.updateUnion(union);
-      return of(union);
+      return SketchHolder.of(union);
     }
   }
 
@@ -208,15 +208,15 @@ public class SketchHolder
   public static SketchHolder deserialize(Object serializedSketch)
   {
     if (serializedSketch instanceof String) {
-      return of(deserializeFromBase64EncodedString((String) serializedSketch));
+      return SketchHolder.of(deserializeFromBase64EncodedString((String) serializedSketch));
     } else if (serializedSketch instanceof byte[]) {
-      return of(deserializeFromByteArray((byte[]) serializedSketch));
+      return SketchHolder.of(deserializeFromByteArray((byte[]) serializedSketch));
     } else if (serializedSketch instanceof SketchHolder) {
       return (SketchHolder) serializedSketch;
     } else if (serializedSketch instanceof Sketch
                || serializedSketch instanceof Union
                || serializedSketch instanceof Memory) {
-      return of(serializedSketch);
+      return SketchHolder.of(serializedSketch);
     }
 
     throw new ISE(
@@ -228,9 +228,9 @@ public class SketchHolder
   public static SketchHolder deserializeSafe(Object serializedSketch)
   {
     if (serializedSketch instanceof String) {
-      return of(deserializeFromBase64EncodedStringSafe((String) serializedSketch));
+      return SketchHolder.of(deserializeFromBase64EncodedStringSafe((String) serializedSketch));
     } else if (serializedSketch instanceof byte[]) {
-      return of(deserializeFromByteArraySafe((byte[]) serializedSketch));
+      return SketchHolder.of(deserializeFromByteArraySafe((byte[]) serializedSketch));
     }
 
     return deserialize(serializedSketch);
@@ -285,13 +285,13 @@ public class SketchHolder
         for (Object o : holders) {
           ((SketchHolder) o).updateUnion(union);
         }
-        return of(union);
+        return SketchHolder.of(union);
       case INTERSECT:
         Intersection intersection = (Intersection) SetOperation.builder().setNominalEntries(sketchSize).build(Family.INTERSECTION);
         for (Object o : holders) {
           intersection.intersect(((SketchHolder) o).getSketch());
         }
-        return of(intersection.getResult(false, null));
+        return SketchHolder.of(intersection.getResult(false, null));
       case NOT:
         if (holders.length < 1) {
           throw new IllegalArgumentException("A-Not-B requires at least 1 sketch");
@@ -306,7 +306,7 @@ public class SketchHolder
           AnotB anotb = (AnotB) SetOperation.builder().setNominalEntries(sketchSize).build(Family.A_NOT_B);
           result = anotb.aNotB(result, ((SketchHolder) holders[i]).getSketch());
         }
-        return of(result);
+        return SketchHolder.of(result);
       default:
         throw new IllegalArgumentException("Unknown sketch operation " + func);
     }
diff --git a/extensions-core/druid-basic-security/src/main/java/org/apache/druid/security/basic/BasicAuthUtils.java b/extensions-core/druid-basic-security/src/main/java/org/apache/druid/security/basic/BasicAuthUtils.java
index 03aec3954e5..44948df4a6a 100644
--- a/extensions-core/druid-basic-security/src/main/java/org/apache/druid/security/basic/BasicAuthUtils.java
+++ b/extensions-core/druid-basic-security/src/main/java/org/apache/druid/security/basic/BasicAuthUtils.java
@@ -160,7 +160,7 @@ public class BasicAuthUtils
       userMap = new HashMap<>();
     } else {
       try {
-        userMap = objectMapper.readValue(userMapBytes, AUTHORIZER_USER_MAP_TYPE_REFERENCE);
+        userMap = objectMapper.readValue(userMapBytes, BasicAuthUtils.AUTHORIZER_USER_MAP_TYPE_REFERENCE);
       }
       catch (IOException ioe) {
         throw new RuntimeException("Couldn't deserialize authorizer userMap!", ioe);
@@ -189,7 +189,7 @@ public class BasicAuthUtils
       groupMappingMap = new HashMap<>();
     } else {
       try {
-        groupMappingMap = objectMapper.readValue(groupMappingMapBytes, AUTHORIZER_GROUP_MAPPING_MAP_TYPE_REFERENCE);
+        groupMappingMap = objectMapper.readValue(groupMappingMapBytes, BasicAuthUtils.AUTHORIZER_GROUP_MAPPING_MAP_TYPE_REFERENCE);
       }
       catch (IOException ioe) {
         throw new RuntimeException("Couldn't deserialize authorizer groupMappingMap!", ioe);
@@ -218,7 +218,7 @@ public class BasicAuthUtils
       roleMap = new HashMap<>();
     } else {
       try {
-        roleMap = objectMapper.readValue(roleMapBytes, AUTHORIZER_ROLE_MAP_TYPE_REFERENCE);
+        roleMap = objectMapper.readValue(roleMapBytes, BasicAuthUtils.AUTHORIZER_ROLE_MAP_TYPE_REFERENCE);
       }
       catch (IOException ioe) {
         throw new RuntimeException("Couldn't deserialize authorizer roleMap!", ioe);
diff --git a/extensions-core/druid-catalog/src/main/java/org/apache/druid/catalog/CatalogException.java b/extensions-core/druid-catalog/src/main/java/org/apache/druid/catalog/CatalogException.java
index e7a7d63e1ec..c09fe35a5a1 100644
--- a/extensions-core/druid-catalog/src/main/java/org/apache/druid/catalog/CatalogException.java
+++ b/extensions-core/druid-catalog/src/main/java/org/apache/druid/catalog/CatalogException.java
@@ -79,7 +79,7 @@ public class CatalogException extends Exception
   public static CatalogException badRequest(String msg, Object...args)
   {
     return new CatalogException(
-        INVALID_ERROR,
+        CatalogException.INVALID_ERROR,
         Response.Status.BAD_REQUEST,
         msg,
         args
diff --git a/extensions-core/hdfs-storage/src/main/java/org/apache/druid/storage/hdfs/HdfsStorageDruidModule.java b/extensions-core/hdfs-storage/src/main/java/org/apache/druid/storage/hdfs/HdfsStorageDruidModule.java
index 159c247becc..e2c79785fe4 100644
--- a/extensions-core/hdfs-storage/src/main/java/org/apache/druid/storage/hdfs/HdfsStorageDruidModule.java
+++ b/extensions-core/hdfs-storage/src/main/java/org/apache/druid/storage/hdfs/HdfsStorageDruidModule.java
@@ -65,9 +65,9 @@ public class HdfsStorageDruidModule implements DruidModule
   {
     return Collections.singletonList(
         new SimpleModule().registerSubtypes(
-            new NamedType(HdfsLoadSpec.class, SCHEME),
-            new NamedType(HdfsInputSource.class, SCHEME),
-            new NamedType(HdfsInputSourceFactory.class, SCHEME)
+            new NamedType(HdfsLoadSpec.class, HdfsStorageDruidModule.SCHEME),
+            new NamedType(HdfsInputSource.class, HdfsStorageDruidModule.SCHEME),
+            new NamedType(HdfsInputSourceFactory.class, HdfsStorageDruidModule.SCHEME)
         )
     );
   }
diff --git a/extensions-core/kafka-indexing-service/src/main/java/org/apache/druid/indexing/kafka/supervisor/KafkaSupervisorTuningConfig.java b/extensions-core/kafka-indexing-service/src/main/java/org/apache/druid/indexing/kafka/supervisor/KafkaSupervisorTuningConfig.java
index 4186837bbb0..1e0b3587409 100644
--- a/extensions-core/kafka-indexing-service/src/main/java/org/apache/druid/indexing/kafka/supervisor/KafkaSupervisorTuningConfig.java
+++ b/extensions-core/kafka-indexing-service/src/main/java/org/apache/druid/indexing/kafka/supervisor/KafkaSupervisorTuningConfig.java
@@ -169,7 +169,7 @@ public class KafkaSupervisorTuningConfig extends KafkaIndexTaskTuningConfig
     // just return a default for now.
     return SeekableStreamSupervisorTuningConfig.defaultDuration(
         null,
-        DEFAULT_REPARTITION_TRANSITION_DURATION
+        SeekableStreamSupervisorTuningConfig.DEFAULT_REPARTITION_TRANSITION_DURATION
     );
   }
 
diff --git a/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/DefaultK8sApiClient.java b/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/DefaultK8sApiClient.java
index 023605a28a9..03a1b6914a8 100644
--- a/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/DefaultK8sApiClient.java
+++ b/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/DefaultK8sApiClient.java
@@ -131,7 +131,7 @@ public class DefaultK8sApiClient implements K8sApiClient
           try {
             while (watch.hasNext()) {
               Watch.Response<V1Pod> item = watch.next();
-              if (item != null && item.type != null && !BOOKMARK.equals(item.type)) {
+              if (item != null && item.type != null && !item.type.equals(WatchResult.BOOKMARK)) {
                 DiscoveryDruidNodeAndResourceVersion result = null;
                 if (item.object != null) {
                   result = new DiscoveryDruidNodeAndResourceVersion(
@@ -150,7 +150,7 @@ public class DefaultK8sApiClient implements K8sApiClient
                     result
                 );
                 return true;
-              } else if (item != null && item.type != null && BOOKMARK.equals(item.type)) {
+              } else if (item != null && item.type != null && item.type.equals(WatchResult.BOOKMARK)) {
                 // Events with type BOOKMARK will only contain resourceVersion and no metadata. See
                 // Kubernetes API documentation for details.
                 LOGGER.debug("BOOKMARK event fired, no nothing, only update resourceVersion");
diff --git a/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/K8sDruidNodeAnnouncer.java b/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/K8sDruidNodeAnnouncer.java
index 184b766128f..f47fcfc0c9a 100644
--- a/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/K8sDruidNodeAnnouncer.java
+++ b/extensions-core/kubernetes-extensions/src/main/java/org/apache/druid/k8s/discovery/K8sDruidNodeAnnouncer.java
@@ -208,8 +208,8 @@ public class K8sDruidNodeAnnouncer implements DruidNodeAnnouncer
         "%s=%s,%s=%s",
         getClusterIdentifierAnnouncementLabel(),
         discoveryConfig.getClusterIdentifier(),
-        getRoleAnnouncementLabel(nodeRole),
-        ANNOUNCEMENT_DONE
+        K8sDruidNodeAnnouncer.getRoleAnnouncementLabel(nodeRole),
+        K8sDruidNodeAnnouncer.ANNOUNCEMENT_DONE
     );
   }
 
@@ -219,9 +219,9 @@ public class K8sDruidNodeAnnouncer implements DruidNodeAnnouncer
         "%s=%s,%s=%s,%s=%s",
         getClusterIdentifierAnnouncementLabel(),
         discoveryConfig.getClusterIdentifier(),
-        getRoleAnnouncementLabel(nodeRole),
-        ANNOUNCEMENT_DONE,
-        getIdHashAnnouncementLabel(),
+        K8sDruidNodeAnnouncer.getRoleAnnouncementLabel(nodeRole),
+        K8sDruidNodeAnnouncer.ANNOUNCEMENT_DONE,
+        K8sDruidNodeAnnouncer.getIdHashAnnouncementLabel(),
         hashEncodeStringForLabelValue(node.getHostAndPortToUse())
     );
   }
diff --git a/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/indexing/processor/SegmentGeneratorFrameProcessorFactory.java b/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/indexing/processor/SegmentGeneratorFrameProcessorFactory.java
index 428fed78cf4..3fa5654c2a5 100644
--- a/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/indexing/processor/SegmentGeneratorFrameProcessorFactory.java
+++ b/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/indexing/processor/SegmentGeneratorFrameProcessorFactory.java
@@ -287,7 +287,7 @@ public class SegmentGeneratorFrameProcessorFactory
       @Override
       public AppendableIndexSpec getAppendableIndexSpec()
       {
-        return DEFAULT_APPENDABLE_INDEX;
+        return TuningConfig.DEFAULT_APPENDABLE_INDEX;
       }
 
       @Override
@@ -346,7 +346,7 @@ public class SegmentGeneratorFrameProcessorFactory
       @Override
       public boolean isSkipBytesInMemoryOverheadCheck()
       {
-        return DEFAULT_SKIP_BYTES_IN_MEMORY_OVERHEAD_CHECK;
+        return TuningConfig.DEFAULT_SKIP_BYTES_IN_MEMORY_OVERHEAD_CHECK;
       }
 
       @Override
diff --git a/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/querykit/QueryKitUtils.java b/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/querykit/QueryKitUtils.java
index ea6b00a8c86..bc0c64c251a 100644
--- a/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/querykit/QueryKitUtils.java
+++ b/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/querykit/QueryKitUtils.java
@@ -111,7 +111,7 @@ public class QueryKitUtils
       return clusterBy;
     } else {
       final List<KeyColumn> newColumns = new ArrayList<>(clusterBy.getColumns().size() + 1);
-      newColumns.add(new KeyColumn(SEGMENT_GRANULARITY_COLUMN, KeyOrder.ASCENDING));
+      newColumns.add(new KeyColumn(QueryKitUtils.SEGMENT_GRANULARITY_COLUMN, KeyOrder.ASCENDING));
       newColumns.addAll(clusterBy.getColumns());
       return new ClusterBy(newColumns, 1);
     }
@@ -123,10 +123,10 @@ public class QueryKitUtils
    */
   public static void verifyRowSignature(final RowSignature signature)
   {
-    if (signature.contains(PARTITION_BOOST_COLUMN)) {
-      throw new MSQException(new ColumnNameRestrictedFault(PARTITION_BOOST_COLUMN));
-    } else if (signature.contains(SEGMENT_GRANULARITY_COLUMN)) {
-      throw new MSQException(new ColumnNameRestrictedFault(SEGMENT_GRANULARITY_COLUMN));
+    if (signature.contains(QueryKitUtils.PARTITION_BOOST_COLUMN)) {
+      throw new MSQException(new ColumnNameRestrictedFault(QueryKitUtils.PARTITION_BOOST_COLUMN));
+    } else if (signature.contains(QueryKitUtils.SEGMENT_GRANULARITY_COLUMN)) {
+      throw new MSQException(new ColumnNameRestrictedFault(QueryKitUtils.SEGMENT_GRANULARITY_COLUMN));
     }
   }
 
@@ -144,7 +144,7 @@ public class QueryKitUtils
     } else {
       return RowSignature.builder()
                          .addAll(signature)
-                         .add(SEGMENT_GRANULARITY_COLUMN, ColumnType.LONG)
+                         .add(QueryKitUtils.SEGMENT_GRANULARITY_COLUMN, ColumnType.LONG)
                          .build();
     }
   }
@@ -194,8 +194,8 @@ public class QueryKitUtils
   public static VirtualColumn makeSegmentGranularityVirtualColumn(final ObjectMapper jsonMapper, final QueryContext queryContext)
   {
     final Granularity segmentGranularity =
-        getSegmentGranularityFromContext(jsonMapper, queryContext.asMap());
-    final String timeColumnName = queryContext.getString(CTX_TIME_COLUMN_NAME);
+        QueryKitUtils.getSegmentGranularityFromContext(jsonMapper, queryContext.asMap());
+    final String timeColumnName = queryContext.getString(QueryKitUtils.CTX_TIME_COLUMN_NAME);
 
     if (timeColumnName == null || Granularities.ALL.equals(segmentGranularity)) {
       return null;
@@ -213,7 +213,7 @@ public class QueryKitUtils
     }
 
     return new ExpressionVirtualColumn(
-        SEGMENT_GRANULARITY_COLUMN,
+        QueryKitUtils.SEGMENT_GRANULARITY_COLUMN,
         StringUtils.format(
             "timestamp_floor(%s, %s)",
             CalciteSqlDialect.DEFAULT.quoteIdentifier(timeColumnName),
diff --git a/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/sql/MSQMode.java b/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/sql/MSQMode.java
index 3685b876c93..d2f017b04dd 100644
--- a/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/sql/MSQMode.java
+++ b/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/sql/MSQMode.java
@@ -50,7 +50,7 @@ public enum MSQMode
   @Nullable
   public static MSQMode fromString(String str)
   {
-    for (MSQMode msqMode : values()) {
+    for (MSQMode msqMode : MSQMode.values()) {
       if (msqMode.value.equalsIgnoreCase(str)) {
         return msqMode;
       }
@@ -66,12 +66,12 @@ public enum MSQMode
 
   public static void populateDefaultQueryContext(final String modeStr, final Map<String, Object> originalQueryContext)
   {
-    MSQMode mode = fromString(modeStr);
+    MSQMode mode = MSQMode.fromString(modeStr);
     if (mode == null) {
       throw new ISE(
           "%s is an unknown multi stage query mode. Acceptable modes: %s",
           modeStr,
-          Arrays.stream(values()).map(m -> m.value).collect(Collectors.toList())
+          Arrays.stream(MSQMode.values()).map(m -> m.value).collect(Collectors.toList())
       );
     }
     log.debug("Populating default query context with %s for the %s multi stage query mode", mode.defaultQueryContext, mode);
diff --git a/extensions-core/s3-extensions/src/main/java/org/apache/druid/storage/s3/S3Utils.java b/extensions-core/s3-extensions/src/main/java/org/apache/druid/storage/s3/S3Utils.java
index 11bf1f613f0..b299d4f9dd8 100644
--- a/extensions-core/s3-extensions/src/main/java/org/apache/druid/storage/s3/S3Utils.java
+++ b/extensions-core/s3-extensions/src/main/java/org/apache/druid/storage/s3/S3Utils.java
@@ -327,7 +327,7 @@ public class S3Utils
       log.debug("Deleting keys from bucket: [%s], keys: [%s]", bucket, keys);
     }
     DeleteObjectsRequest deleteRequest = new DeleteObjectsRequest(bucket).withKeys(keysToDelete);
-    retryS3Operation(() -> {
+    S3Utils.retryS3Operation(() -> {
       s3Client.deleteObjects(deleteRequest);
       return null;
     }, retries);
@@ -353,7 +353,7 @@ public class S3Utils
     final PutObjectRequest putObjectRequest = new PutObjectRequest(bucket, key, file);
 
     if (!disableAcl) {
-      putObjectRequest.setAccessControlList(grantFullControlToBucketOwner(service, bucket));
+      putObjectRequest.setAccessControlList(S3Utils.grantFullControlToBucketOwner(service, bucket));
     }
     log.info("Pushing [%s] to bucket[%s] and key[%s].", file, bucket, key);
     service.putObject(putObjectRequest);
diff --git a/indexing-hadoop/src/main/java/org/apache/druid/indexer/DeterminePartitionsJob.java b/indexing-hadoop/src/main/java/org/apache/druid/indexer/DeterminePartitionsJob.java
index 82b04c5bb8a..3efb6c5bec7 100644
--- a/indexing-hadoop/src/main/java/org/apache/druid/indexer/DeterminePartitionsJob.java
+++ b/indexing-hadoop/src/main/java/org/apache/druid/indexer/DeterminePartitionsJob.java
@@ -956,7 +956,7 @@ public class DeterminePartitionsJob implements Jobby
     @Override
     public void checkOutputSpecs(JobContext job) throws IOException
     {
-      Path outDir = getOutputPath(job);
+      Path outDir = FileOutputFormat.getOutputPath(job);
       if (outDir == null) {
         throw new InvalidJobConfException("Output directory not set.");
       }
diff --git a/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopDruidIndexerConfig.java b/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopDruidIndexerConfig.java
index 2d46563c905..bb830afd244 100644
--- a/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopDruidIndexerConfig.java
+++ b/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopDruidIndexerConfig.java
@@ -148,13 +148,13 @@ public class HadoopDruidIndexerConfig
     // the Map<> intermediary
 
     if (argSpec.containsKey("spec")) {
-      return JSON_MAPPER.convertValue(
+      return HadoopDruidIndexerConfig.JSON_MAPPER.convertValue(
           argSpec,
           HadoopDruidIndexerConfig.class
       );
     }
     return new HadoopDruidIndexerConfig(
-        JSON_MAPPER.convertValue(
+        HadoopDruidIndexerConfig.JSON_MAPPER.convertValue(
             argSpec,
             HadoopIngestionSpec.class
         )
@@ -166,7 +166,7 @@ public class HadoopDruidIndexerConfig
   {
     try {
       return fromMap(
-          JSON_MAPPER.readValue(file, JacksonUtils.TYPE_REFERENCE_MAP_STRING_OBJECT)
+          HadoopDruidIndexerConfig.JSON_MAPPER.readValue(file, JacksonUtils.TYPE_REFERENCE_MAP_STRING_OBJECT)
       );
     }
     catch (IOException e) {
@@ -180,7 +180,7 @@ public class HadoopDruidIndexerConfig
     // This is a map to try and prevent dependency screwbally-ness
     try {
       return fromMap(
-          JSON_MAPPER.readValue(str, JacksonUtils.TYPE_REFERENCE_MAP_STRING_OBJECT)
+          HadoopDruidIndexerConfig.JSON_MAPPER.readValue(str, JacksonUtils.TYPE_REFERENCE_MAP_STRING_OBJECT)
       );
     }
     catch (IOException e) {
@@ -197,7 +197,7 @@ public class HadoopDruidIndexerConfig
       Reader reader = new InputStreamReader(fs.open(pt), StandardCharsets.UTF_8);
 
       return fromMap(
-          JSON_MAPPER.readValue(reader, JacksonUtils.TYPE_REFERENCE_MAP_STRING_OBJECT)
+          HadoopDruidIndexerConfig.JSON_MAPPER.readValue(reader, JacksonUtils.TYPE_REFERENCE_MAP_STRING_OBJECT)
       );
     }
     catch (Exception e) {
@@ -207,7 +207,7 @@ public class HadoopDruidIndexerConfig
 
   public static HadoopDruidIndexerConfig fromConfiguration(Configuration conf)
   {
-    final HadoopDruidIndexerConfig retVal = fromString(conf.get(CONFIG_PROPERTY));
+    final HadoopDruidIndexerConfig retVal = fromString(conf.get(HadoopDruidIndexerConfig.CONFIG_PROPERTY));
     retVal.verify();
     return retVal;
   }
@@ -590,7 +590,7 @@ public class HadoopDruidIndexerConfig
     Configuration conf = job.getConfiguration();
 
     try {
-      conf.set(CONFIG_PROPERTY, JSON_MAPPER.writeValueAsString(this));
+      conf.set(HadoopDruidIndexerConfig.CONFIG_PROPERTY, HadoopDruidIndexerConfig.JSON_MAPPER.writeValueAsString(this));
     }
     catch (IOException e) {
       throw new RuntimeException(e);
diff --git a/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopTuningConfig.java b/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopTuningConfig.java
index dfc3a4c6935..9da6ead38cf 100644
--- a/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopTuningConfig.java
+++ b/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopTuningConfig.java
@@ -188,9 +188,9 @@ public class HadoopTuningConfig implements TuningConfig
     this.ignoreInvalidRows = Configs.valueOrDefault(ignoreInvalidRows, false);
     this.maxParseExceptions = Configs.valueOrDefault(
         maxParseExceptions,
-        this.ignoreInvalidRows ? DEFAULT_MAX_PARSE_EXCEPTIONS : 0
+        this.ignoreInvalidRows ? TuningConfig.DEFAULT_MAX_PARSE_EXCEPTIONS : 0
     );
-    this.logParseExceptions = Configs.valueOrDefault(logParseExceptions, DEFAULT_LOG_PARSE_EXCEPTIONS);
+    this.logParseExceptions = Configs.valueOrDefault(logParseExceptions, TuningConfig.DEFAULT_LOG_PARSE_EXCEPTIONS);
     this.useYarnRMJobStatusFallback = Configs.valueOrDefault(useYarnRMJobStatusFallback, true);
 
     if (awaitSegmentAvailabilityTimeoutMillis == null || awaitSegmentAvailabilityTimeoutMillis < 0) {
diff --git a/indexing-hadoop/src/main/java/org/apache/druid/indexer/JobHelper.java b/indexing-hadoop/src/main/java/org/apache/druid/indexer/JobHelper.java
index ce042451d75..7639ba66b5f 100644
--- a/indexing-hadoop/src/main/java/org/apache/druid/indexer/JobHelper.java
+++ b/indexing-hadoop/src/main/java/org/apache/druid/indexer/JobHelper.java
@@ -413,9 +413,9 @@ public class JobHelper
     authenticate();
 
     HadoopDruidIndexerConfig config = HadoopDruidIndexerConfig.fromSpec(indexerSchema);
-    final Configuration configuration = injectSystemProperties(new Configuration(), config);
+    final Configuration configuration = JobHelper.injectSystemProperties(new Configuration(), config);
     config.addJobProperties(configuration);
-    injectDruidProperties(configuration, config);
+    JobHelper.injectDruidProperties(configuration, config);
     if (!config.getSchema().getTuningConfig().isLeaveIntermediate()) {
       if (jobSucceeded || config.getSchema().getTuningConfig().isCleanupOnFailure()) {
         Path workingPath = config.makeIntermediatePath();
@@ -619,7 +619,7 @@ public class JobHelper
         prependFSIfNullScheme(fs, basePath),
         StringUtils.format(
             "./%s.%d",
-            dataSegmentPusher.makeIndexPathName(segmentTemplate, INDEX_ZIP),
+            dataSegmentPusher.makeIndexPathName(segmentTemplate, JobHelper.INDEX_ZIP),
             taskAttemptID.getId()
         )
     );
@@ -640,9 +640,9 @@ public class JobHelper
   ) throws IOException
   {
     HadoopDruidIndexerConfig config = HadoopDruidIndexerConfig.fromSpec(indexerSchema);
-    final Configuration configuration = injectSystemProperties(new Configuration(), config);
+    final Configuration configuration = JobHelper.injectSystemProperties(new Configuration(), config);
     config.addJobProperties(configuration);
-    injectDruidProperties(configuration, config);
+    JobHelper.injectDruidProperties(configuration, config);
     for (DataSegmentAndIndexZipFilePath segmentAndIndexZipFilePath : segmentAndIndexZipFilePaths) {
       Path tmpPath = new Path(segmentAndIndexZipFilePath.getTmpIndexZipFilePath());
       Path finalIndexZipFilePath = new Path(segmentAndIndexZipFilePath.getFinalIndexZipFilePath());
diff --git a/indexing-hadoop/src/main/java/org/apache/druid/indexer/hadoop/DatasourceInputFormat.java b/indexing-hadoop/src/main/java/org/apache/druid/indexer/hadoop/DatasourceInputFormat.java
index 788b4987a38..e6d39284c5a 100644
--- a/indexing-hadoop/src/main/java/org/apache/druid/indexer/hadoop/DatasourceInputFormat.java
+++ b/indexing-hadoop/src/main/java/org/apache/druid/indexer/hadoop/DatasourceInputFormat.java
@@ -160,7 +160,7 @@ public class DatasourceInputFormat extends InputFormat<NullWritable, InputRow>
         {
           // to avoid globbing which needs input path should be hadoop-compatible (':' is not acceptable in path, etc.)
           List<FileStatus> statusList = new ArrayList<>();
-          for (Path path : getInputPaths(job)) {
+          for (Path path : FileInputFormat.getInputPaths(job)) {
             // load spec in segment points specifically zip file itself
             statusList.add(path.getFileSystem(job).getFileStatus(path));
           }
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/AbstractBatchIndexTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/AbstractBatchIndexTask.java
index 08c5accea33..185e6e014c6 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/AbstractBatchIndexTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/AbstractBatchIndexTask.java
@@ -812,7 +812,7 @@ public abstract class AbstractBatchIndexTask extends AbstractTask
         throw new ISE("Unspecified interval[%s] in granularitySpec[%s]", interval, granularitySpec);
       }
 
-      version = findVersion(versions, interval);
+      version = AbstractBatchIndexTask.findVersion(versions, interval);
       if (version == null) {
         throw new ISE("Cannot find a version for interval[%s]", interval);
       }
@@ -820,7 +820,7 @@ public abstract class AbstractBatchIndexTask extends AbstractTask
       // We don't have explicit intervals. We can use the segment granularity to figure out what
       // interval we need, but we might not have already locked it.
       interval = granularitySpec.getSegmentGranularity().bucket(timestamp);
-      final String existingLockVersion = findVersion(versions, interval);
+      final String existingLockVersion = AbstractBatchIndexTask.findVersion(versions, interval);
       if (existingLockVersion == null) {
         if (ingestionSpec.getTuningConfig() instanceof ParallelIndexTuningConfig) {
           final int maxAllowedLockCount = ((ParallelIndexTuningConfig) ingestionSpec.getTuningConfig())
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/HadoopIndexTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/HadoopIndexTask.java
index a8927d2fe1d..319c1a7ab69 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/HadoopIndexTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/HadoopIndexTask.java
@@ -535,7 +535,7 @@ public class HadoopIndexTask extends HadoopTask implements ChatHandler
       String hadoopJobIdFile = getHadoopJobIdFileName();
 
       try {
-        ClassLoader loader = buildClassLoader(
+        ClassLoader loader = HadoopTask.buildClassLoader(
             getHadoopDependencyCoordinates(),
             taskConfig.getDefaultHadoopCoordinates()
         );
@@ -616,7 +616,7 @@ public class HadoopIndexTask extends HadoopTask implements ChatHandler
 
     final ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
     try {
-      ClassLoader loader = buildClassLoader(
+      ClassLoader loader = HadoopTask.buildClassLoader(
           getHadoopDependencyCoordinates(),
           taskConfig.getDefaultHadoopCoordinates()
       );
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTask.java
index d745a893431..9c114d3403f 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTask.java
@@ -81,6 +81,7 @@ import org.apache.druid.segment.incremental.RowIngestionMeters;
 import org.apache.druid.segment.indexing.BatchIOConfig;
 import org.apache.druid.segment.indexing.DataSchema;
 import org.apache.druid.segment.indexing.IngestionSpec;
+import org.apache.druid.segment.indexing.TuningConfig;
 import org.apache.druid.segment.indexing.granularity.ArbitraryGranularitySpec;
 import org.apache.druid.segment.indexing.granularity.GranularitySpec;
 import org.apache.druid.segment.realtime.ChatHandler;
@@ -741,7 +742,7 @@ public class IndexTask extends AbstractBatchIndexTask implements ChatHandler, Pe
         Comparators.intervalsByStartThenEnd()
     );
     final Granularity queryGranularity = granularitySpec.getQueryGranularity();
-    try (final CloseableIterator<InputRow> inputRowIterator = inputSourceReader(
+    try (final CloseableIterator<InputRow> inputRowIterator = AbstractBatchIndexTask.inputSourceReader(
         tmpDir,
         ingestionSchema.getDataSchema(),
         inputSource,
@@ -1069,7 +1070,7 @@ public class IndexTask extends AbstractBatchIndexTask implements ChatHandler, Pe
         throw new IAE("Cannot use parser and inputSource together. Try using inputFormat instead of parser.");
       }
 
-      IngestionMode ingestionMode = computeBatchIngestionMode(ioConfig);
+      IngestionMode ingestionMode = AbstractTask.computeBatchIngestionMode(ioConfig);
 
       if (ingestionMode == IngestionMode.REPLACE && dataSchema.getGranularitySpec()
                                                               .inputIntervals()
@@ -1132,8 +1133,8 @@ public class IndexTask extends AbstractBatchIndexTask implements ChatHandler, Pe
     {
       this.inputSource = inputSource;
       this.inputFormat = inputFormat;
-      this.appendToExisting = appendToExisting == null ? DEFAULT_APPEND_EXISTING : appendToExisting;
-      this.dropExisting = dropExisting == null ? DEFAULT_DROP_EXISTING : dropExisting;
+      this.appendToExisting = appendToExisting == null ? BatchIOConfig.DEFAULT_APPEND_EXISTING : appendToExisting;
+      this.dropExisting = dropExisting == null ? BatchIOConfig.DEFAULT_DROP_EXISTING : dropExisting;
     }
 
     @Nullable
@@ -1366,7 +1367,7 @@ public class IndexTask extends AbstractBatchIndexTask implements ChatHandler, Pe
     )
     {
       this.appendableIndexSpec = appendableIndexSpec == null ? DEFAULT_APPENDABLE_INDEX : appendableIndexSpec;
-      this.maxRowsInMemory = maxRowsInMemory == null ? DEFAULT_MAX_ROWS_IN_MEMORY_BATCH : maxRowsInMemory;
+      this.maxRowsInMemory = maxRowsInMemory == null ? TuningConfig.DEFAULT_MAX_ROWS_IN_MEMORY_BATCH : maxRowsInMemory;
       // initializing this to 0, it will be lazily initialized to a value
       // @see #getMaxBytesInMemoryOrDefault()
       this.maxBytesInMemory = maxBytesInMemory == null ? 0 : maxBytesInMemory;
@@ -1394,14 +1395,14 @@ public class IndexTask extends AbstractBatchIndexTask implements ChatHandler, Pe
         this.maxSavedParseExceptions = maxSavedParseExceptions == null ? 0 : Math.min(1, maxSavedParseExceptions);
       } else {
         this.maxParseExceptions = maxParseExceptions == null
-                                  ? DEFAULT_MAX_PARSE_EXCEPTIONS
+                                  ? TuningConfig.DEFAULT_MAX_PARSE_EXCEPTIONS
                                   : maxParseExceptions;
         this.maxSavedParseExceptions = maxSavedParseExceptions == null
-                                       ? DEFAULT_MAX_SAVED_PARSE_EXCEPTIONS
+                                       ? TuningConfig.DEFAULT_MAX_SAVED_PARSE_EXCEPTIONS
                                        : maxSavedParseExceptions;
       }
       this.logParseExceptions = logParseExceptions == null
-                                ? DEFAULT_LOG_PARSE_EXCEPTIONS
+                                ? TuningConfig.DEFAULT_LOG_PARSE_EXCEPTIONS
                                 : logParseExceptions;
       if (awaitSegmentAvailabilityTimeoutMillis == null || awaitSegmentAvailabilityTimeoutMillis < 0) {
         this.awaitSegmentAvailabilityTimeoutMillis = DEFAULT_AWAIT_SEGMENT_AVAILABILITY_TIMEOUT_MILLIS;
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTaskUtils.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTaskUtils.java
index 06a2da71f8a..79a3e8993a8 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTaskUtils.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/IndexTaskUtils.java
@@ -138,12 +138,12 @@ public class IndexTaskUtils
   )
   {
     final ServiceMetricEvent.Builder metricBuilder = new ServiceMetricEvent.Builder();
-    setTaskDimensions(metricBuilder, task);
+    IndexTaskUtils.setTaskDimensions(metricBuilder, task);
 
     if (publishResult.isSuccess()) {
       toolbox.getEmitter().emit(metricBuilder.setMetric("segment/txn/success", 1));
       for (DataSegment segment : publishResult.getSegments()) {
-        setSegmentDimensions(metricBuilder, segment);
+        IndexTaskUtils.setSegmentDimensions(metricBuilder, segment);
         toolbox.getEmitter().emit(metricBuilder.setMetric("segment/added/bytes", segment.getSize()));
         toolbox.getEmitter().emit(SegmentMetadataEvent.create(segment, DateTimes.nowUtc()));
       }
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/LegacySinglePhaseSubTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/LegacySinglePhaseSubTask.java
index 36853987a6d..d2694c7afd9 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/LegacySinglePhaseSubTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/LegacySinglePhaseSubTask.java
@@ -54,7 +54,7 @@ public class LegacySinglePhaseSubTask extends SinglePhaseSubTask
   @Override
   public String getType()
   {
-    return OLD_TYPE_NAME;
+    return SinglePhaseSubTask.OLD_TYPE_NAME;
   }
 
 }
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionCardinalityTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionCardinalityTask.java
index 67d97c62b81..d75304f38c0 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionCardinalityTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionCardinalityTask.java
@@ -37,6 +37,7 @@ import org.apache.druid.indexer.partitions.HashedPartitionsSpec;
 import org.apache.druid.indexing.common.TaskToolbox;
 import org.apache.druid.indexing.common.actions.SurrogateTaskActionClient;
 import org.apache.druid.indexing.common.actions.TaskActionClient;
+import org.apache.druid.indexing.common.task.AbstractBatchIndexTask;
 import org.apache.druid.indexing.common.task.TaskResource;
 import org.apache.druid.java.util.common.granularity.Granularity;
 import org.apache.druid.java.util.common.parsers.CloseableIterator;
@@ -181,7 +182,7 @@ public class PartialDimensionCardinalityTask extends PerfectRollupWorkerTask
         tuningConfig.getMaxSavedParseExceptions()
     );
     try (
-        final CloseableIterator<InputRow> inputRowIterator = inputSourceReader(
+        final CloseableIterator<InputRow> inputRowIterator = AbstractBatchIndexTask.inputSourceReader(
             toolbox.getIndexingTmpDir(),
             dataSchema,
             inputSource,
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionDistributionTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionDistributionTask.java
index 089424377aa..4bb395420b3 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionDistributionTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialDimensionDistributionTask.java
@@ -40,6 +40,7 @@ import org.apache.druid.indexer.partitions.DimensionRangePartitionsSpec;
 import org.apache.druid.indexing.common.TaskToolbox;
 import org.apache.druid.indexing.common.actions.SurrogateTaskActionClient;
 import org.apache.druid.indexing.common.actions.TaskActionClient;
+import org.apache.druid.indexing.common.task.AbstractBatchIndexTask;
 import org.apache.druid.indexing.common.task.TaskResource;
 import org.apache.druid.indexing.common.task.batch.parallel.distribution.StringDistribution;
 import org.apache.druid.indexing.common.task.batch.parallel.distribution.StringSketch;
@@ -228,7 +229,7 @@ public class PartialDimensionDistributionTask extends PerfectRollupWorkerTask
         tuningConfig.getMaxSavedParseExceptions()
     );
     try (
-        final CloseableIterator<InputRow> inputRowIterator = inputSourceReader(
+        final CloseableIterator<InputRow> inputRowIterator = AbstractBatchIndexTask.inputSourceReader(
             toolbox.getIndexingTmpDir(),
             dataSchema,
             inputSource,
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialSegmentMergeTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialSegmentMergeTask.java
index fa4122904c5..17d9936c685 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialSegmentMergeTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/PartialSegmentMergeTask.java
@@ -32,6 +32,7 @@ import org.apache.druid.indexing.common.TaskToolbox;
 import org.apache.druid.indexing.common.actions.LockListAction;
 import org.apache.druid.indexing.common.actions.SurrogateAction;
 import org.apache.druid.indexing.common.actions.TaskActionClient;
+import org.apache.druid.indexing.common.task.AbstractBatchIndexTask;
 import org.apache.druid.indexing.common.task.TaskResource;
 import org.apache.druid.java.util.common.FileUtils;
 import org.apache.druid.java.util.common.ISE;
@@ -292,7 +293,7 @@ abstract class PartialSegmentMergeTask<S extends ShardSpec> extends PerfectRollu
                 getDataSource(),
                 interval,
                 Preconditions.checkNotNull(
-                    findVersion(intervalToVersion, interval),
+                    AbstractBatchIndexTask.findVersion(intervalToVersion, interval),
                     "version for interval[%s]",
                     interval
                 ),
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/SinglePhaseSubTask.java b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/SinglePhaseSubTask.java
index db9dc26372c..8d49a7f3dbe 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/SinglePhaseSubTask.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/common/task/batch/parallel/SinglePhaseSubTask.java
@@ -38,6 +38,8 @@ import org.apache.druid.indexing.common.TaskToolbox;
 import org.apache.druid.indexing.common.actions.SurrogateTaskActionClient;
 import org.apache.druid.indexing.common.actions.TaskActionClient;
 import org.apache.druid.indexing.common.stats.TaskRealtimeMetricsMonitor;
+import org.apache.druid.indexing.common.task.AbstractBatchIndexTask;
+import org.apache.druid.indexing.common.task.AbstractTask;
 import org.apache.druid.indexing.common.task.BatchAppenderators;
 import org.apache.druid.indexing.common.task.IndexTask;
 import org.apache.druid.indexing.common.task.IndexTaskUtils;
@@ -163,7 +165,7 @@ public class SinglePhaseSubTask extends AbstractBatchSubtask implements ChatHand
         taskResource,
         ingestionSchema.getDataSchema().getDataSource(),
         context,
-        computeBatchIngestionMode(ingestionSchema.getIOConfig()),
+        AbstractTask.computeBatchIngestionMode(ingestionSchema.getIOConfig()),
         supervisorTaskId
     );
 
@@ -407,7 +409,7 @@ public class SinglePhaseSubTask extends AbstractBatchSubtask implements ChatHand
     boolean exceptionOccurred = false;
     try (
         final BatchAppenderatorDriver driver = BatchAppenderators.newDriver(appenderator, toolbox, segmentAllocator);
-        final CloseableIterator<InputRow> inputRowIterator = inputSourceReader(
+        final CloseableIterator<InputRow> inputRowIterator = AbstractBatchIndexTask.inputSourceReader(
             tmpDir,
             dataSchema,
             inputSource,
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidInputSource.java b/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidInputSource.java
index 8f83a63057c..84c17f1a8fa 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidInputSource.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidInputSource.java
@@ -397,7 +397,7 @@ public class DruidInputSource extends AbstractInputSource implements SplittableI
               coordinatorClient,
               dataSource,
               interval,
-              splitHintSpec == null ? DEFAULT_SPLIT_HINT_SPEC : splitHintSpec
+              splitHintSpec == null ? SplittableInputSource.DEFAULT_SPLIT_HINT_SPEC : splitHintSpec
           )
       );
     } else {
@@ -417,7 +417,7 @@ public class DruidInputSource extends AbstractInputSource implements SplittableI
               coordinatorClient,
               dataSource,
               interval,
-              splitHintSpec == null ? DEFAULT_SPLIT_HINT_SPEC : splitHintSpec
+              splitHintSpec == null ? SplittableInputSource.DEFAULT_SPLIT_HINT_SPEC : splitHintSpec
           )
       );
     } else {
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/overlord/QuotableWhiteSpaceSplitter.java b/indexing-service/src/main/java/org/apache/druid/indexing/overlord/QuotableWhiteSpaceSplitter.java
index 49c8d166150..88e11821abc 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/overlord/QuotableWhiteSpaceSplitter.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/overlord/QuotableWhiteSpaceSplitter.java
@@ -54,7 +54,7 @@ public class QuotableWhiteSpaceSplitter implements Iterable<String>
             if (inQuotes) {
               return false;
             }
-            return breakingWhitespace().matches(c);
+            return CharMatcher.breakingWhitespace().matches(c);
           }
         }
     ).omitEmptyStrings().split(string).iterator();
diff --git a/indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskTuningConfig.java b/indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskTuningConfig.java
index b802ffc044d..309336e1d53 100644
--- a/indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskTuningConfig.java
+++ b/indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskTuningConfig.java
@@ -23,6 +23,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import org.apache.druid.indexer.partitions.DynamicPartitionsSpec;
 import org.apache.druid.segment.IndexSpec;
 import org.apache.druid.segment.incremental.AppendableIndexSpec;
+import org.apache.druid.segment.indexing.TuningConfig;
 import org.apache.druid.segment.realtime.appenderator.AppenderatorConfig;
 import org.apache.druid.segment.writeout.SegmentWriteOutMediumFactory;
 import org.joda.time.Period;
@@ -130,14 +131,14 @@ public abstract class SeekableStreamIndexTaskTuningConfig implements Appenderato
       this.maxSavedParseExceptions = maxSavedParseExceptions == null ? 0 : Math.min(1, maxSavedParseExceptions);
     } else {
       this.maxParseExceptions = maxParseExceptions == null
-                                ? DEFAULT_MAX_PARSE_EXCEPTIONS
+                                ? TuningConfig.DEFAULT_MAX_PARSE_EXCEPTIONS
                                 : maxParseExceptions;
       this.maxSavedParseExceptions = maxSavedParseExceptions == null
-                                     ? DEFAULT_MAX_SAVED_PARSE_EXCEPTIONS
+                                     ? TuningConfig.DEFAULT_MAX_SAVED_PARSE_EXCEPTIONS
                                      : maxSavedParseExceptions;
     }
     this.logParseExceptions = logParseExceptions == null
-                              ? DEFAULT_LOG_PARSE_EXCEPTIONS
+                              ? TuningConfig.DEFAULT_LOG_PARSE_EXCEPTIONS
                               : logParseExceptions;
     this.numPersistThreads = numPersistThreads == null ?
                                 DEFAULT_NUM_PERSIST_THREADS : Math.max(numPersistThreads, DEFAULT_NUM_PERSIST_THREADS);
diff --git a/integration-tests-ex/tools/src/main/java/org/apache/druid/testing/tools/CliCustomNodeRole.java b/integration-tests-ex/tools/src/main/java/org/apache/druid/testing/tools/CliCustomNodeRole.java
index df5ef8827eb..087cb24bec5 100644
--- a/integration-tests-ex/tools/src/main/java/org/apache/druid/testing/tools/CliCustomNodeRole.java
+++ b/integration-tests-ex/tools/src/main/java/org/apache/druid/testing/tools/CliCustomNodeRole.java
@@ -66,7 +66,7 @@ public class CliCustomNodeRole extends ServerRunnable
   public static final String SERVICE_NAME = "custom-node-role";
   public static final int PORT = 9301;
   public static final int TLS_PORT = 9501;
-  public static final NodeRole NODE_ROLE = new NodeRole(SERVICE_NAME);
+  public static final NodeRole NODE_ROLE = new NodeRole(CliCustomNodeRole.SERVICE_NAME);
 
   public CliCustomNodeRole()
   {
@@ -85,9 +85,9 @@ public class CliCustomNodeRole extends ServerRunnable
     return ImmutableList.of(
         binder -> {
           LOG.info("starting up custom node role");
-          binder.bindConstant().annotatedWith(Names.named("serviceName")).to(SERVICE_NAME);
-          binder.bindConstant().annotatedWith(Names.named("servicePort")).to(PORT);
-          binder.bindConstant().annotatedWith(Names.named("tlsServicePort")).to(TLS_PORT);
+          binder.bindConstant().annotatedWith(Names.named("serviceName")).to(CliCustomNodeRole.SERVICE_NAME);
+          binder.bindConstant().annotatedWith(Names.named("servicePort")).to(CliCustomNodeRole.PORT);
+          binder.bindConstant().annotatedWith(Names.named("tlsServicePort")).to(CliCustomNodeRole.TLS_PORT);
 
           binder.bind(JettyServerInitializer.class).to(CustomJettyServiceInitializer.class).in(LazySingleton.class);
           LifecycleModule.register(binder, Server.class);
diff --git a/integration-tests/src/main/java/org/apache/druid/cli/CliCustomNodeRole.java b/integration-tests/src/main/java/org/apache/druid/cli/CliCustomNodeRole.java
index eade6b9eda0..e0e1605b302 100644
--- a/integration-tests/src/main/java/org/apache/druid/cli/CliCustomNodeRole.java
+++ b/integration-tests/src/main/java/org/apache/druid/cli/CliCustomNodeRole.java
@@ -65,7 +65,7 @@ public class CliCustomNodeRole extends ServerRunnable
   public static final String SERVICE_NAME = "custom-node-role";
   public static final int PORT = 9301;
   public static final int TLS_PORT = 9501;
-  public static final NodeRole NODE_ROLE = new NodeRole(SERVICE_NAME);
+  public static final NodeRole NODE_ROLE = new NodeRole(CliCustomNodeRole.SERVICE_NAME);
 
   public CliCustomNodeRole()
   {
@@ -84,9 +84,9 @@ public class CliCustomNodeRole extends ServerRunnable
     return ImmutableList.of(
         binder -> {
           LOG.info("starting up");
-          binder.bindConstant().annotatedWith(Names.named("serviceName")).to(SERVICE_NAME);
-          binder.bindConstant().annotatedWith(Names.named("servicePort")).to(PORT);
-          binder.bindConstant().annotatedWith(Names.named("tlsServicePort")).to(TLS_PORT);
+          binder.bindConstant().annotatedWith(Names.named("serviceName")).to(CliCustomNodeRole.SERVICE_NAME);
+          binder.bindConstant().annotatedWith(Names.named("servicePort")).to(CliCustomNodeRole.PORT);
+          binder.bindConstant().annotatedWith(Names.named("tlsServicePort")).to(CliCustomNodeRole.TLS_PORT);
 
           binder.bind(JettyServerInitializer.class).to(CustomJettyServiceInitializer.class).in(LazySingleton.class);
           LifecycleModule.register(binder, Server.class);
diff --git a/integration-tests/src/main/java/org/apache/druid/testing/utils/AvroSchemaRegistryEventSerializer.java b/integration-tests/src/main/java/org/apache/druid/testing/utils/AvroSchemaRegistryEventSerializer.java
index a5df23466ca..dd1e82f82df 100644
--- a/integration-tests/src/main/java/org/apache/druid/testing/utils/AvroSchemaRegistryEventSerializer.java
+++ b/integration-tests/src/main/java/org/apache/druid/testing/utils/AvroSchemaRegistryEventSerializer.java
@@ -73,7 +73,7 @@ public class AvroSchemaRegistryEventSerializer extends AvroEventSerializer
     try {
       RetryUtils.retry(
           () -> {
-            schemaId = client.register(topic, SCHEMA);
+            schemaId = client.register(topic, AvroEventSerializer.SCHEMA);
             fromRegistry = client.getById(schemaId);
             return 0;
           },
diff --git a/integration-tests/src/main/java/org/apache/druid/testing/utils/ProtobufSchemaRegistryEventSerializer.java b/integration-tests/src/main/java/org/apache/druid/testing/utils/ProtobufSchemaRegistryEventSerializer.java
index f2a65ae95df..8d80b22af35 100644
--- a/integration-tests/src/main/java/org/apache/druid/testing/utils/ProtobufSchemaRegistryEventSerializer.java
+++ b/integration-tests/src/main/java/org/apache/druid/testing/utils/ProtobufSchemaRegistryEventSerializer.java
@@ -68,7 +68,7 @@ public class ProtobufSchemaRegistryEventSerializer extends ProtobufEventSerializ
     try {
       RetryUtils.retry(
           () -> {
-            schemaId = client.register(topic, new ProtobufSchema(SCHEMA.newMessageBuilder("Wikipedia").getDescriptorForType()));
+            schemaId = client.register(topic, new ProtobufSchema(ProtobufEventSerializer.SCHEMA.newMessageBuilder("Wikipedia").getDescriptorForType()));
             return 0;
           },
           (e) -> true,
diff --git a/processing/src/main/java/org/apache/druid/collections/spatial/search/PolygonBound.java b/processing/src/main/java/org/apache/druid/collections/spatial/search/PolygonBound.java
index f8d14f81e3d..1ef82732a4f 100644
--- a/processing/src/main/java/org/apache/druid/collections/spatial/search/PolygonBound.java
+++ b/processing/src/main/java/org/apache/druid/collections/spatial/search/PolygonBound.java
@@ -101,7 +101,7 @@ public class PolygonBound extends RectangularBound
 
   public static PolygonBound from(float[] abscissa, float[] ordinate)
   {
-    return from(abscissa, ordinate, 0);
+    return PolygonBound.from(abscissa, ordinate, 0);
   }
 
   @JsonProperty
diff --git a/processing/src/main/java/org/apache/druid/common/config/NullHandling.java b/processing/src/main/java/org/apache/druid/common/config/NullHandling.java
index 578c64acbc5..da287172224 100644
--- a/processing/src/main/java/org/apache/druid/common/config/NullHandling.java
+++ b/processing/src/main/java/org/apache/druid/common/config/NullHandling.java
@@ -128,7 +128,7 @@ public class NullHandling
    */
   public static boolean useThreeValueLogic()
   {
-    return sqlCompatible() &&
+    return NullHandling.sqlCompatible() &&
            INSTANCE.isUseThreeValueLogicForNativeFilters();
   }
 
@@ -266,7 +266,7 @@ public class NullHandling
    */
   public static boolean mustCombineNullAndEmptyInDictionary(final Indexed<ByteBuffer> dictionaryUtf8)
   {
-    return replaceWithDefault()
+    return NullHandling.replaceWithDefault()
            && dictionaryUtf8.size() >= 2
            && isNullOrEquivalent(dictionaryUtf8.get(0))
            && isNullOrEquivalent(dictionaryUtf8.get(1));
@@ -283,7 +283,7 @@ public class NullHandling
    */
   public static boolean mustReplaceFirstValueWithNullInDictionary(final Indexed<ByteBuffer> dictionaryUtf8)
   {
-    if (replaceWithDefault() && dictionaryUtf8.size() >= 1) {
+    if (NullHandling.replaceWithDefault() && dictionaryUtf8.size() >= 1) {
       final ByteBuffer firstValue = dictionaryUtf8.get(0);
       return firstValue != null && firstValue.remaining() == 0;
     }
diff --git a/processing/src/main/java/org/apache/druid/common/guava/FutureUtils.java b/processing/src/main/java/org/apache/druid/common/guava/FutureUtils.java
index 83a83b4f1a5..7f244ec7d35 100644
--- a/processing/src/main/java/org/apache/druid/common/guava/FutureUtils.java
+++ b/processing/src/main/java/org/apache/druid/common/guava/FutureUtils.java
@@ -73,7 +73,7 @@ public class FutureUtils
   public static <T> T getUnchecked(final ListenableFuture<T> future, final boolean cancelIfInterrupted)
   {
     try {
-      return get(future, cancelIfInterrupted);
+      return FutureUtils.get(future, cancelIfInterrupted);
     }
     catch (InterruptedException e) {
       Thread.currentThread().interrupt();
@@ -103,7 +103,7 @@ public class FutureUtils
   /**
    * Like {@link Futures#transform}, but works better with lambdas due to not having overloads.
    *
-   * One can write {@code transform(future, v -> ...)} instead of
+   * One can write {@code FutureUtils.transform(future, v -> ...)} instead of
    * {@code Futures.transform(future, (Function<? super T, ?>) v -> ...)}
    */
   public static <T, R> ListenableFuture<R> transform(final ListenableFuture<T> future, final Function<T, R> fn)
@@ -115,7 +115,7 @@ public class FutureUtils
    * Like {@link Futures#transformAsync(ListenableFuture, AsyncFunction, java.util.concurrent.Executor)}, but works better with lambdas due to not having
    * overloads.
    *
-   * One can write {@code transformAsync(future, v -> ...)} instead of
+   * One can write {@code FutureUtils.transformAsync(future, v -> ...)} instead of
    * {@code Futures.transform(future, (Function<? super T, ?>) v -> ...)}
    */
   public static <T, R> ListenableFuture<R> transformAsync(final ListenableFuture<T> future, final AsyncFunction<T, R> fn)
diff --git a/processing/src/main/java/org/apache/druid/common/utils/IdUtils.java b/processing/src/main/java/org/apache/druid/common/utils/IdUtils.java
index ee769dfd89e..88d4d0d413b 100644
--- a/processing/src/main/java/org/apache/druid/common/utils/IdUtils.java
+++ b/processing/src/main/java/org/apache/druid/common/utils/IdUtils.java
@@ -100,7 +100,7 @@ public class IdUtils
 
   public static String getRandomIdWithPrefix(String prefix)
   {
-    return UNDERSCORE_JOINER.join(prefix, getRandomId());
+    return UNDERSCORE_JOINER.join(prefix, IdUtils.getRandomId());
   }
 
   public static String newTaskId(String typeName, String dataSource, @Nullable Interval interval)
diff --git a/processing/src/main/java/org/apache/druid/data/input/impl/DimensionsSpec.java b/processing/src/main/java/org/apache/druid/data/input/impl/DimensionsSpec.java
index a22f72ab9fb..c13b69105ea 100644
--- a/processing/src/main/java/org/apache/druid/data/input/impl/DimensionsSpec.java
+++ b/processing/src/main/java/org/apache/druid/data/input/impl/DimensionsSpec.java
@@ -139,7 +139,7 @@ public class DimensionsSpec
     }
 
     for (SpatialDimensionSchema spatialSchema : spatialDims) {
-      DimensionSchema newSchema = convertSpatialSchema(spatialSchema);
+      DimensionSchema newSchema = DimensionsSpec.convertSpatialSchema(spatialSchema);
       this.dimensions.add(newSchema);
       dimensionSchemaMap.put(newSchema.getName(), newSchema);
     }
diff --git a/processing/src/main/java/org/apache/druid/data/input/impl/DoubleDimensionSchema.java b/processing/src/main/java/org/apache/druid/data/input/impl/DoubleDimensionSchema.java
index 041907a09ce..2bde0812214 100644
--- a/processing/src/main/java/org/apache/druid/data/input/impl/DoubleDimensionSchema.java
+++ b/processing/src/main/java/org/apache/druid/data/input/impl/DoubleDimensionSchema.java
@@ -36,7 +36,7 @@ public class DoubleDimensionSchema extends DimensionSchema
   @Override
   public String getTypeName()
   {
-    return DOUBLE_TYPE_NAME;
+    return DimensionSchema.DOUBLE_TYPE_NAME;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/data/input/impl/FloatDimensionSchema.java b/processing/src/main/java/org/apache/druid/data/input/impl/FloatDimensionSchema.java
index ca7b3e2a400..1a9d6e73fe3 100644
--- a/processing/src/main/java/org/apache/druid/data/input/impl/FloatDimensionSchema.java
+++ b/processing/src/main/java/org/apache/druid/data/input/impl/FloatDimensionSchema.java
@@ -39,7 +39,7 @@ public class FloatDimensionSchema extends DimensionSchema
   @Override
   public String getTypeName()
   {
-    return FLOAT_TYPE_NAME;
+    return DimensionSchema.FLOAT_TYPE_NAME;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/data/input/impl/LongDimensionSchema.java b/processing/src/main/java/org/apache/druid/data/input/impl/LongDimensionSchema.java
index 3c9ee334ffb..e8a90a7a481 100644
--- a/processing/src/main/java/org/apache/druid/data/input/impl/LongDimensionSchema.java
+++ b/processing/src/main/java/org/apache/druid/data/input/impl/LongDimensionSchema.java
@@ -40,7 +40,7 @@ public class LongDimensionSchema extends DimensionSchema
   @Override
   public String getTypeName()
   {
-    return LONG_TYPE_NAME;
+    return DimensionSchema.LONG_TYPE_NAME;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/data/input/impl/NewSpatialDimensionSchema.java b/processing/src/main/java/org/apache/druid/data/input/impl/NewSpatialDimensionSchema.java
index d46c7ca130a..bd1fd8292ae 100644
--- a/processing/src/main/java/org/apache/druid/data/input/impl/NewSpatialDimensionSchema.java
+++ b/processing/src/main/java/org/apache/druid/data/input/impl/NewSpatialDimensionSchema.java
@@ -59,7 +59,7 @@ public class NewSpatialDimensionSchema extends DimensionSchema
   @Override
   public String getTypeName()
   {
-    return SPATIAL_TYPE_NAME;
+    return DimensionSchema.SPATIAL_TYPE_NAME;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/data/input/impl/StringDimensionSchema.java b/processing/src/main/java/org/apache/druid/data/input/impl/StringDimensionSchema.java
index 11775039655..2af2fbbaac2 100644
--- a/processing/src/main/java/org/apache/druid/data/input/impl/StringDimensionSchema.java
+++ b/processing/src/main/java/org/apache/druid/data/input/impl/StringDimensionSchema.java
@@ -54,7 +54,7 @@ public class StringDimensionSchema extends DimensionSchema
   @Override
   public String getTypeName()
   {
-    return STRING_TYPE_NAME;
+    return DimensionSchema.STRING_TYPE_NAME;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/extendedset/intset/ImmutableConciseSet.java b/processing/src/main/java/org/apache/druid/extendedset/intset/ImmutableConciseSet.java
index 0d3ac643de6..b48bae6c0b2 100755
--- a/processing/src/main/java/org/apache/druid/extendedset/intset/ImmutableConciseSet.java
+++ b/processing/src/main/java/org/apache/druid/extendedset/intset/ImmutableConciseSet.java
@@ -209,7 +209,7 @@ public class ImmutableConciseSet
         }
       }
       ConciseSet newSet = new ConciseSet(words, false);
-      return newImmutableFromMutable(newSet);
+      return ImmutableConciseSet.newImmutableFromMutable(newSet);
     }
 
     IntList retVal = new IntList();
diff --git a/processing/src/main/java/org/apache/druid/frame/Frame.java b/processing/src/main/java/org/apache/druid/frame/Frame.java
index 49a9a2347d7..8185190a28d 100644
--- a/processing/src/main/java/org/apache/druid/frame/Frame.java
+++ b/processing/src/main/java/org/apache/druid/frame/Frame.java
@@ -240,12 +240,12 @@ public class Frame
         );
       }
 
-      return wrap(dstBuffer);
+      return Frame.wrap(dstBuffer);
     } else {
       // Copy first, then decompress.
       final byte[] compressedFrame = new byte[compressedFrameLength];
       memory.getByteArray(frameStart, compressedFrame, 0, compressedFrameLength);
-      return wrap(LZ4_DECOMPRESSOR.decompress(compressedFrame, uncompressedFrameLength));
+      return Frame.wrap(LZ4_DECOMPRESSOR.decompress(compressedFrame, uncompressedFrameLength));
     }
   }
 
diff --git a/processing/src/main/java/org/apache/druid/frame/key/RowKeyReader.java b/processing/src/main/java/org/apache/druid/frame/key/RowKeyReader.java
index 69958187b86..d26f248e801 100644
--- a/processing/src/main/java/org/apache/druid/frame/key/RowKeyReader.java
+++ b/processing/src/main/java/org/apache/druid/frame/key/RowKeyReader.java
@@ -149,7 +149,7 @@ public class RowKeyReader
       newSignature.add(columnName, columnType);
     }
 
-    return create(newSignature.build());
+    return RowKeyReader.create(newSignature.build());
   }
 
   /**
diff --git a/processing/src/main/java/org/apache/druid/frame/processor/OutputChannel.java b/processing/src/main/java/org/apache/druid/frame/processor/OutputChannel.java
index 058450dd063..e1377eddca3 100644
--- a/processing/src/main/java/org/apache/druid/frame/processor/OutputChannel.java
+++ b/processing/src/main/java/org/apache/druid/frame/processor/OutputChannel.java
@@ -243,7 +243,7 @@ public class OutputChannel
    */
   public OutputChannel readOnly()
   {
-    return readOnly(readableChannelSupplier, partitionNumber);
+    return OutputChannel.readOnly(readableChannelSupplier, partitionNumber);
   }
 
   /**
diff --git a/processing/src/main/java/org/apache/druid/frame/util/DurableStorageUtils.java b/processing/src/main/java/org/apache/druid/frame/util/DurableStorageUtils.java
index 476b7f3f015..168d96fc20a 100644
--- a/processing/src/main/java/org/apache/druid/frame/util/DurableStorageUtils.java
+++ b/processing/src/main/java/org/apache/druid/frame/util/DurableStorageUtils.java
@@ -252,7 +252,7 @@ public class DurableStorageUtils
     if (elements.size() < 2) {
       return false;
     }
-    if (!QUERY_RESULTS_DIR.equals(elements.get(0))) {
+    if (!DurableStorageUtils.QUERY_RESULTS_DIR.equals(elements.get(0))) {
       return false;
     }
     return knownTasks.contains(elements.get(1));
diff --git a/processing/src/main/java/org/apache/druid/frame/write/FrameWriterUtils.java b/processing/src/main/java/org/apache/druid/frame/write/FrameWriterUtils.java
index affa5a453ca..a480767f111 100644
--- a/processing/src/main/java/org/apache/druid/frame/write/FrameWriterUtils.java
+++ b/processing/src/main/java/org/apache/druid/frame/write/FrameWriterUtils.java
@@ -318,7 +318,7 @@ public class FrameWriterUtils
         return buf;
       }
     } else {
-      return getUtf8ByteBufferFromString(selector.lookupName(dictionaryId));
+      return FrameWriterUtils.getUtf8ByteBufferFromString(selector.lookupName(dictionaryId));
     }
   }
 
diff --git a/processing/src/main/java/org/apache/druid/hll/HyperLogLogCollector.java b/processing/src/main/java/org/apache/druid/hll/HyperLogLogCollector.java
index f8ef6acc152..d285f1cd044 100644
--- a/processing/src/main/java/org/apache/druid/hll/HyperLogLogCollector.java
+++ b/processing/src/main/java/org/apache/druid/hll/HyperLogLogCollector.java
@@ -394,7 +394,7 @@ public abstract class HyperLogLogCollector implements Comparable<HyperLogLogColl
         convertToDenseStorage();
       }
 
-      other = makeCollector(tmpBuffer);
+      other = HyperLogLogCollector.makeCollector(tmpBuffer);
     }
 
     final ByteBuffer otherBuffer = other.storageBuffer;
@@ -574,7 +574,7 @@ public abstract class HyperLogLogCollector implements Comparable<HyperLogLogColl
 
     final ByteBuffer denseStorageBuffer;
     if (storageBuffer.remaining() != getNumBytesForDenseStorage()) {
-      HyperLogLogCollector denseCollector = makeCollector(storageBuffer.duplicate());
+      HyperLogLogCollector denseCollector = HyperLogLogCollector.makeCollector(storageBuffer.duplicate());
       denseCollector.convertToDenseStorage();
       denseStorageBuffer = denseCollector.storageBuffer;
     } else {
@@ -582,7 +582,7 @@ public abstract class HyperLogLogCollector implements Comparable<HyperLogLogColl
     }
 
     if (otherBuffer.remaining() != getNumBytesForDenseStorage()) {
-      HyperLogLogCollector otherCollector = makeCollector(otherBuffer.duplicate());
+      HyperLogLogCollector otherCollector = HyperLogLogCollector.makeCollector(otherBuffer.duplicate());
       otherCollector.convertToDenseStorage();
       otherBuffer = otherCollector.storageBuffer;
     }
diff --git a/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java b/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java
index ed664775f4e..2992814de45 100644
--- a/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java
+++ b/processing/src/main/java/org/apache/druid/indexer/TaskLocation.java
@@ -60,7 +60,7 @@ public class TaskLocation
 
   public static TaskLocation unknown()
   {
-    return UNKNOWN;
+    return TaskLocation.UNKNOWN;
   }
 
   @JsonCreator
diff --git a/processing/src/main/java/org/apache/druid/indexer/partitions/DimensionRangePartitionsSpec.java b/processing/src/main/java/org/apache/druid/indexer/partitions/DimensionRangePartitionsSpec.java
index 5b83a5feca0..744f5c9e681 100644
--- a/processing/src/main/java/org/apache/druid/indexer/partitions/DimensionRangePartitionsSpec.java
+++ b/processing/src/main/java/org/apache/druid/indexer/partitions/DimensionRangePartitionsSpec.java
@@ -125,7 +125,7 @@ public class DimensionRangePartitionsSpec implements DimensionBasedPartitionsSpe
     return resolvedMaxRowPerSegment;  // NOTE: This returns the *resolved* value
   }
 
-  @JsonProperty(MAX_ROWS_PER_SEGMENT)
+  @JsonProperty(PartitionsSpec.MAX_ROWS_PER_SEGMENT)
   protected Integer getMaxRowsPerSegmentForJson()
   {
     return maxRowsPerSegment;
diff --git a/processing/src/main/java/org/apache/druid/indexer/partitions/DynamicPartitionsSpec.java b/processing/src/main/java/org/apache/druid/indexer/partitions/DynamicPartitionsSpec.java
index bd60493bd79..2c5d294f3c1 100644
--- a/processing/src/main/java/org/apache/druid/indexer/partitions/DynamicPartitionsSpec.java
+++ b/processing/src/main/java/org/apache/druid/indexer/partitions/DynamicPartitionsSpec.java
@@ -46,7 +46,7 @@ public class DynamicPartitionsSpec implements PartitionsSpec
 
   @JsonCreator
   public DynamicPartitionsSpec(
-      @JsonProperty(MAX_ROWS_PER_SEGMENT) @Nullable Integer maxRowsPerSegment,
+      @JsonProperty(PartitionsSpec.MAX_ROWS_PER_SEGMENT) @Nullable Integer maxRowsPerSegment,
       @JsonProperty("maxTotalRows") @Nullable Long maxTotalRows
   )
   {
diff --git a/processing/src/main/java/org/apache/druid/indexer/partitions/HashedPartitionsSpec.java b/processing/src/main/java/org/apache/druid/indexer/partitions/HashedPartitionsSpec.java
index 688d4a60137..c9561ac47da 100644
--- a/processing/src/main/java/org/apache/druid/indexer/partitions/HashedPartitionsSpec.java
+++ b/processing/src/main/java/org/apache/druid/indexer/partitions/HashedPartitionsSpec.java
@@ -93,7 +93,7 @@ public class HashedPartitionsSpec implements DimensionBasedPartitionsSpec
     // Supply default for targetRowsPerSegment if needed
     if (target.getValue() == null) {
       //noinspection VariableNotUsedInsideIf (false positive for this.numShards)
-      this.maxRowsPerSegment = (this.numShards == null ? DEFAULT_MAX_ROWS_PER_SEGMENT : null);
+      this.maxRowsPerSegment = (this.numShards == null ? PartitionsSpec.DEFAULT_MAX_ROWS_PER_SEGMENT : null);
     } else {
       this.maxRowsPerSegment = target.getValue();
     }
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/Either.java b/processing/src/main/java/org/apache/druid/java/util/common/Either.java
index 342c06212dd..5a2720d0748 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/Either.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/Either.java
@@ -111,7 +111,7 @@ public class Either<L, R>
   public <T> Either<L, T> map(final Function<R, T> fn)
   {
     if (isValue()) {
-      return value(fn.apply(value));
+      return Either.value(fn.apply(value));
     } else {
       // Safe because the value is never going to be returned.
       //noinspection unchecked
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytes.java b/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytes.java
index f44e6c327a5..63e697cc954 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytes.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/HumanReadableBytes.java
@@ -30,7 +30,7 @@ public class HumanReadableBytes
 
   public HumanReadableBytes(String bytes)
   {
-    this.bytes = parse(bytes);
+    this.bytes = HumanReadableBytes.parse(bytes);
   }
 
   public HumanReadableBytes(long bytes)
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java b/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java
index 282c436ebcd..d8ef9956d9b 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/StringUtils.java
@@ -54,7 +54,7 @@ public class StringUtils
   private static final Base64.Decoder BASE64_DECODER = Base64.getDecoder();
 
   // should be used only for estimation
-  // returns the same result with fromUtf8(value).length for valid string values
+  // returns the same result with StringUtils.fromUtf8(value).length for valid string values
   // does not check validity of format and returns over-estimated result for invalid string (see UT)
   public static int estimatedBinaryLengthAsUTF8(String value)
   {
@@ -257,7 +257,7 @@ public class StringUtils
    */
   public static String fromUtf8(final ByteBuffer buffer)
   {
-    return fromUtf8(buffer, buffer.remaining());
+    return StringUtils.fromUtf8(buffer, buffer.remaining());
   }
 
   /**
@@ -273,7 +273,7 @@ public class StringUtils
     if (buffer == null) {
       return null;
     }
-    return fromUtf8(buffer, buffer.remaining());
+    return StringUtils.fromUtf8(buffer, buffer.remaining());
   }
 
   /**
@@ -390,7 +390,7 @@ public class StringUtils
     if (s == null) {
       return null;
     } else {
-      return replaceChar(s, '%', "%%");
+      return StringUtils.replaceChar(s, '%', "%%");
     }
   }
 
@@ -422,7 +422,7 @@ public class StringUtils
     }
 
     try {
-      return replace(URLEncoder.encode(s, "UTF-8"), "+", "%20");
+      return StringUtils.replace(URLEncoder.encode(s, "UTF-8"), "+", "%20");
     }
     catch (UnsupportedEncodingException e) {
       throw new RuntimeException(e);
@@ -792,7 +792,7 @@ public class StringUtils
     } else {
       // Shorten firstValue to what could fit in maxBytes as UTF-8.
       final byte[] bytes = new byte[maxBytes];
-      final int len = toUtf8WithLimit(s, ByteBuffer.wrap(bytes));
+      final int len = StringUtils.toUtf8WithLimit(s, ByteBuffer.wrap(bytes));
       return new String(bytes, 0, len, StandardCharsets.UTF_8);
     }
   }
@@ -831,6 +831,6 @@ public class StringUtils
    */
   public static String escapeSql(String str)
   {
-    return str == null ? null : replace(str, "'", "''");
+    return str == null ? null : StringUtils.replace(str, "'", "''");
   }
 }
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/granularity/Granularities.java b/processing/src/main/java/org/apache/druid/java/util/common/granularity/Granularities.java
index 1ae9281e8ab..08de0a364ec 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/granularity/Granularities.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/granularity/Granularities.java
@@ -68,7 +68,7 @@ public class Granularities
 
   public static Granularity nullToAll(Granularity granularity)
   {
-    return granularity == null ? ALL : granularity;
+    return granularity == null ? Granularities.ALL : granularity;
   }
 
   /**
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/granularity/GranularityType.java b/processing/src/main/java/org/apache/druid/java/util/common/granularity/GranularityType.java
index 26fe8e44f64..b4b78390605 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/granularity/GranularityType.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/granularity/GranularityType.java
@@ -176,7 +176,7 @@ public enum GranularityType
    */
   public static boolean isStandard(Granularity granularity)
   {
-    final GranularityType[] values = values();
+    final GranularityType[] values = GranularityType.values();
     for (GranularityType value : values) {
       if (value.getDefaultGranularity().equals(granularity)) {
         return true;
@@ -205,42 +205,42 @@ public enum GranularityType
 
     switch (index) {
       case 0:
-        return YEAR;
+        return GranularityType.YEAR;
       case 1:
         if (vals[index] == 3) {
-          return QUARTER;
+          return GranularityType.QUARTER;
         } else if (vals[index] == 1) {
-          return MONTH;
+          return GranularityType.MONTH;
         }
         break;
       case 2:
-        return WEEK;
+        return GranularityType.WEEK;
       case 3:
-        return DAY;
+        return GranularityType.DAY;
       case 4:
         if (vals[index] == 8) {
-          return EIGHT_HOUR;
+          return GranularityType.EIGHT_HOUR;
         } else if (vals[index] == 6) {
-          return SIX_HOUR;
+          return GranularityType.SIX_HOUR;
         } else if (vals[index] == 1) {
-          return HOUR;
+          return GranularityType.HOUR;
         }
         break;
       case 5:
         if (vals[index] == 30) {
-          return THIRTY_MINUTE;
+          return GranularityType.THIRTY_MINUTE;
         } else if (vals[index] == 15) {
-          return FIFTEEN_MINUTE;
+          return GranularityType.FIFTEEN_MINUTE;
         } else if (vals[index] == 10) {
-          return TEN_MINUTE;
+          return GranularityType.TEN_MINUTE;
         } else if (vals[index] == 5) {
-          return FIVE_MINUTE;
+          return GranularityType.FIVE_MINUTE;
         } else if (vals[index] == 1) {
-          return MINUTE;
+          return GranularityType.MINUTE;
         }
         break;
       case 6:
-        return SECOND;
+        return GranularityType.SECOND;
       default:
         break;
     }
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/guava/Sequences.java b/processing/src/main/java/org/apache/druid/java/util/common/guava/Sequences.java
index 5b4cd7f2e6d..15f878af130 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/guava/Sequences.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/guava/Sequences.java
@@ -56,7 +56,7 @@ public class Sequences
 
   public static <T> Sequence<T> concat(Iterable<Sequence<T>> sequences)
   {
-    return concat(simple(sequences));
+    return concat(Sequences.simple(sequences));
   }
 
   public static <T> Sequence<T> concat(Sequence<? extends Sequence<T>> sequences)
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/parsers/JSONPathFieldSpec.java b/processing/src/main/java/org/apache/druid/java/util/common/parsers/JSONPathFieldSpec.java
index 04e372f4f5d..9ddde9b8970 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/parsers/JSONPathFieldSpec.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/parsers/JSONPathFieldSpec.java
@@ -103,7 +103,7 @@ public class JSONPathFieldSpec
   @JsonCreator
   public static JSONPathFieldSpec fromString(String name)
   {
-    return createRootField(name);
+    return JSONPathFieldSpec.createRootField(name);
   }
 
   public static JSONPathFieldSpec createNestedField(String name, String expr)
diff --git a/processing/src/main/java/org/apache/druid/java/util/common/parsers/ParserUtils.java b/processing/src/main/java/org/apache/druid/java/util/common/parsers/ParserUtils.java
index fe86ae3035b..18afba4491d 100644
--- a/processing/src/main/java/org/apache/druid/java/util/common/parsers/ParserUtils.java
+++ b/processing/src/main/java/org/apache/druid/java/util/common/parsers/ParserUtils.java
@@ -76,7 +76,7 @@ public class ParserUtils
       if (input.contains(listDelimiter)) {
         return StreamSupport.stream(listSplitter.split(input).spliterator(), false)
             .map(NullHandling::emptyToNullIfNeeded)
-            .map(value -> tryParseNumbers ? tryParseStringAsNumber(value) : value)
+            .map(value -> tryParseNumbers ? ParserUtils.tryParseStringAsNumber(value) : value)
             .collect(Collectors.toList());
       } else {
         return tryParseNumbers ?
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/core/HttpPostEmitter.java b/processing/src/main/java/org/apache/druid/java/util/emitter/core/HttpPostEmitter.java
index 93ef6b1a124..879aba3d8b7 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/core/HttpPostEmitter.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/core/HttpPostEmitter.java
@@ -524,7 +524,7 @@ public class HttpPostEmitter implements Flushable, Closeable, Emitter
 
     private boolean needsToShutdown()
     {
-      boolean needsToShutdown = interrupted() || shuttingDown;
+      boolean needsToShutdown = Thread.interrupted() || shuttingDown;
       if (needsToShutdown) {
         Object lastBatch = concurrentBatch.getAndSet(null);
         if (lastBatch instanceof Batch) {
@@ -722,7 +722,7 @@ public class HttpPostEmitter implements Flushable, Closeable, Emitter
       final long backoffCheckDelayMillis = config.getMinHttpTimeoutMillis() / 5;
 
       try {
-        sleep(backoffCheckDelayMillis);
+        Thread.sleep(backoffCheckDelayMillis);
       }
       catch (InterruptedException ignored) {
         return;
diff --git a/processing/src/main/java/org/apache/druid/java/util/emitter/service/AlertBuilder.java b/processing/src/main/java/org/apache/druid/java/util/emitter/service/AlertBuilder.java
index c0c2b98b901..352272d67bc 100644
--- a/processing/src/main/java/org/apache/druid/java/util/emitter/service/AlertBuilder.java
+++ b/processing/src/main/java/org/apache/druid/java/util/emitter/service/AlertBuilder.java
@@ -46,7 +46,7 @@ public class AlertBuilder extends ServiceEventBuilder<AlertEvent>
 
   public static AlertBuilder create(String descriptionFormat, Object... objects)
   {
-    return createEmittable(null, descriptionFormat, objects);
+    return AlertBuilder.createEmittable(null, descriptionFormat, objects);
   }
 
   public static AlertBuilder createEmittable(ServiceEmitter emitter, String descriptionFormat, Object... objects)
diff --git a/processing/src/main/java/org/apache/druid/math/expr/Evals.java b/processing/src/main/java/org/apache/druid/math/expr/Evals.java
index 91a1dce688a..0010679a814 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/Evals.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/Evals.java
@@ -82,11 +82,11 @@ public class Evals
     if (val instanceof Boolean) {
       return (Boolean) val;
     } else if (val instanceof String) {
-      return asBoolean((String) val);
+      return Evals.asBoolean((String) val);
     } else if (val instanceof Long) {
-      return asBoolean((Long) val);
+      return Evals.asBoolean((Long) val);
     } else if (val instanceof Number) {
-      return asBoolean(((Number) val).doubleValue());
+      return Evals.asBoolean(((Number) val).doubleValue());
     }
     return false;
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java b/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java
index 3c2e5630df4..f0d411a8e37 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/ExprEval.java
@@ -166,14 +166,14 @@ public abstract class ExprEval<T>
         Object[] array = new Object[val.size()];
         int i = 0;
         for (Object o : val) {
-          array[i++] = o != null ? ofType(ExpressionType.LONG, o).value() : null;
+          array[i++] = o != null ? ExprEval.ofType(ExpressionType.LONG, o).value() : null;
         }
         return new NonnullPair<>(ExpressionType.LONG_ARRAY, array);
       } else if (coercedType == Float.class || coercedType == Double.class) {
         Object[] array = new Object[val.size()];
         int i = 0;
         for (Object o : val) {
-          array[i++] = o != null ? ofType(ExpressionType.DOUBLE, o).value() : null;
+          array[i++] = o != null ? ExprEval.ofType(ExpressionType.DOUBLE, o).value() : null;
         }
         return new NonnullPair<>(ExpressionType.DOUBLE_ARRAY, array);
       } else if (coercedType == Object.class) {
@@ -184,7 +184,7 @@ public abstract class ExprEval<T>
         ExpressionType elementType = null;
         for (Object o : val) {
           if (o != null) {
-            ExprEval<?> eval = bestEffortOf(o);
+            ExprEval<?> eval = ExprEval.bestEffortOf(o);
             elementType = ExpressionTypeConversion.leastRestrictiveType(elementType, eval.type());
             evals[i++] = eval;
           } else {
@@ -196,7 +196,7 @@ public abstract class ExprEval<T>
           if (eval != null) {
             array[i++] = eval.castTo(elementType).value();
           } else {
-            array[i++] = ofType(elementType, null).value();
+            array[i++] = ExprEval.ofType(elementType, null).value();
           }
         }
         ExpressionType arrayType = elementType == null
@@ -208,7 +208,7 @@ public abstract class ExprEval<T>
       Object[] array = new Object[val.size()];
       int i = 0;
       for (Object o : val) {
-        array[i++] = o != null ? ofType(ExpressionType.STRING, o).value() : null;
+        array[i++] = o != null ? ExprEval.ofType(ExpressionType.STRING, o).value() : null;
       }
       return new NonnullPair<>(ExpressionType.STRING_ARRAY, array);
     }
@@ -530,7 +530,7 @@ public abstract class ExprEval<T>
           return ofLongBoolean((Boolean) value);
         }
         if (value instanceof String) {
-          return ofLong(computeNumber((String) value));
+          return ofLong(ExprEval.computeNumber((String) value));
         }
         return ofLong(null);
       case DOUBLE:
@@ -541,7 +541,7 @@ public abstract class ExprEval<T>
           return ofDouble(Evals.asDouble((Boolean) value));
         }
         if (value instanceof String) {
-          return ofDouble(computeNumber((String) value));
+          return ofDouble(ExprEval.computeNumber((String) value));
         }
         return ofDouble(null);
       case COMPLEX:
@@ -576,7 +576,7 @@ public abstract class ExprEval<T>
           Object[] array = new Object[theList.size()];
           int i = 0;
           for (Object o : theList) {
-            array[i++] = ofType(elementType, o).value();
+            array[i++] = ExprEval.ofType(elementType, o).value();
           }
           return ofArray(type, array);
         }
@@ -586,7 +586,7 @@ public abstract class ExprEval<T>
           Object[] array = new Object[inputArray.length];
           int i = 0;
           for (Object o : inputArray) {
-            array[i++] = ofType(elementType, o).value();
+            array[i++] = ExprEval.ofType(elementType, o).value();
           }
           return ofArray(type, array);
         }
@@ -861,20 +861,20 @@ public abstract class ExprEval<T>
           return this;
         case LONG:
           if (value == null) {
-            return ofLong(null);
+            return ExprEval.ofLong(null);
           } else {
-            return of(asLong());
+            return ExprEval.of(asLong());
           }
         case STRING:
-          return of(asString());
+          return ExprEval.of(asString());
         case ARRAY:
           switch (castTo.getElementType().getType()) {
             case DOUBLE:
-              return ofDoubleArray(asArray());
+              return ExprEval.ofDoubleArray(asArray());
             case LONG:
-              return ofLongArray(value == null ? null : new Object[]{value.longValue()});
+              return ExprEval.ofLongArray(value == null ? null : new Object[]{value.longValue()});
             case STRING:
-              return ofStringArray(value == null ? null : new Object[]{value.toString()});
+              return ExprEval.ofStringArray(value == null ? null : new Object[]{value.toString()});
             default:
               ExpressionType elementType = (ExpressionType) castTo.getElementType();
               return new ArrayExprEval(castTo, new Object[]{castTo(elementType).value()});
@@ -942,25 +942,25 @@ public abstract class ExprEval<T>
       switch (castTo.getType()) {
         case DOUBLE:
           if (value == null) {
-            return ofDouble(null);
+            return ExprEval.ofDouble(null);
           } else {
-            return of(asDouble());
+            return ExprEval.of(asDouble());
           }
         case LONG:
           return this;
         case STRING:
-          return of(asString());
+          return ExprEval.of(asString());
         case ARRAY:
           if (value == null) {
             return new ArrayExprEval(castTo, null);
           }
           switch (castTo.getElementType().getType()) {
             case DOUBLE:
-              return ofDoubleArray(new Object[]{value.doubleValue()});
+              return ExprEval.ofDoubleArray(new Object[]{value.doubleValue()});
             case LONG:
-              return ofLongArray(asArray());
+              return ExprEval.ofLongArray(asArray());
             case STRING:
-              return ofStringArray(new Object[]{value.toString()});
+              return ExprEval.ofStringArray(new Object[]{value.toString()});
             default:
               ExpressionType elementType = (ExpressionType) castTo.getElementType();
               return new ArrayExprEval(castTo, new Object[]{castTo(elementType).value()});
@@ -1121,10 +1121,10 @@ public abstract class ExprEval<T>
     {
       switch (castTo.getType()) {
         case DOUBLE:
-          return ofDouble(computeNumber());
+          return ExprEval.ofDouble(computeNumber());
 
         case LONG:
-          return ofLong(computeNumber());
+          return ExprEval.ofLong(computeNumber());
 
         case STRING:
           return this;
@@ -1136,12 +1136,12 @@ public abstract class ExprEval<T>
           ExprType type = castTo.getElementType().getType();
           if (type == ExprType.DOUBLE) {
             final Number number = computeNumber();
-            return ofDoubleArray(new Object[]{number == null ? null : number.doubleValue()});
+            return ExprEval.ofDoubleArray(new Object[]{number == null ? null : number.doubleValue()});
           } else if (type == ExprType.LONG) {
             final Number number = computeNumber();
-            return ofLongArray(new Object[]{number == null ? null : number.longValue()});
+            return ExprEval.ofLongArray(new Object[]{number == null ? null : number.longValue()});
           } else if (type == ExprType.STRING) {
-            return ofStringArray(new Object[]{value});
+            return ExprEval.ofStringArray(new Object[]{value});
           }
 
           ExpressionType elementType = (ExpressionType) castTo.getElementType();
@@ -1306,7 +1306,7 @@ public abstract class ExprEval<T>
         if (castTo.isArray()) {
           return new ArrayExprEval(castTo, null);
         }
-        return ofType(castTo, null);
+        return ExprEval.ofType(castTo, null);
       }
       if (type().equals(castTo)) {
         return this;
@@ -1314,26 +1314,26 @@ public abstract class ExprEval<T>
       switch (castTo.getType()) {
         case STRING:
           if (value.length == 1) {
-            return of(asString());
+            return ExprEval.of(asString());
           }
           break;
         case LONG:
           if (value.length == 1) {
-            return isNumericNull() ? ofLong(null) : ofLong(asLong());
+            return isNumericNull() ? ExprEval.ofLong(null) : ExprEval.ofLong(asLong());
           }
           break;
         case DOUBLE:
           if (value.length == 1) {
-            return isNumericNull() ? ofDouble(null) : ofDouble(asDouble());
+            return isNumericNull() ? ExprEval.ofDouble(null) : ExprEval.ofDouble(asDouble());
           }
           break;
         case ARRAY:
           ExpressionType elementType = (ExpressionType) castTo.getElementType();
           Object[] cast = new Object[value.length];
           for (int i = 0; i < value.length; i++) {
-            cast[i] = ofType(elementType(), value[i]).castTo(elementType).value();
+            cast[i] = ExprEval.ofType(elementType(), value[i]).castTo(elementType).value();
           }
-          return ofArray(castTo, cast);
+          return ExprEval.ofArray(castTo, cast);
         case COMPLEX:
           if (ExpressionType.NESTED_DATA.equals(castTo)) {
             return new NestedDataExprEval(value);
@@ -1507,7 +1507,7 @@ public abstract class ExprEval<T>
         } else if (val instanceof Boolean) {
           number = Evals.asLong((Boolean) val);
         } else if (val instanceof String) {
-          number = computeNumber((String) val);
+          number = ExprEval.computeNumber((String) val);
         }
       }
     }
@@ -1517,7 +1517,7 @@ public abstract class ExprEval<T>
     public Object[] asArray()
     {
       Object val = StructuredData.unwrap(value);
-      ExprEval maybeArray = bestEffortOf(val);
+      ExprEval maybeArray = ExprEval.bestEffortOf(val);
       if (maybeArray.type().isPrimitive() || maybeArray.isArray()) {
         return maybeArray.asArray();
       }
@@ -1532,7 +1532,7 @@ public abstract class ExprEval<T>
       }
 
       Object val = StructuredData.unwrap(value);
-      ExprEval bestEffortOf = bestEffortOf(val);
+      ExprEval bestEffortOf = ExprEval.bestEffortOf(val);
 
       if (bestEffortOf.type().isPrimitive() || bestEffortOf.type().isArray()) {
         return bestEffortOf.castTo(castTo);
diff --git a/processing/src/main/java/org/apache/druid/math/expr/ExprMacroTable.java b/processing/src/main/java/org/apache/druid/math/expr/ExprMacroTable.java
index 9aa1029898a..40d8ba1112c 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/ExprMacroTable.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/ExprMacroTable.java
@@ -159,7 +159,7 @@ public class ExprMacroTable
           macro.name(),
           args.size() == 1
           ? args.get(0).stringify()
-          : ARG_JOINER.join(args.stream().map(Expr::stringify).iterator())
+          : Expr.ARG_JOINER.join(args.stream().map(Expr::stringify).iterator())
       );
     }
 
diff --git a/processing/src/main/java/org/apache/druid/math/expr/ExprType.java b/processing/src/main/java/org/apache/druid/math/expr/ExprType.java
index 40da7469566..9a9294cb404 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/ExprType.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/ExprType.java
@@ -49,6 +49,6 @@ public enum ExprType implements TypeDescriptor
   @Override
   public boolean isArray()
   {
-    return this == ARRAY;
+    return this == ExprType.ARRAY;
   }
 }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/ExpressionType.java b/processing/src/main/java/org/apache/druid/math/expr/ExpressionType.java
index 86d47d92cb2..42f32212097 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/ExpressionType.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/ExpressionType.java
@@ -54,7 +54,7 @@ public class ExpressionType extends BaseTypeSignature<ExprType>
   public static final ExpressionType DOUBLE_ARRAY =
       new ExpressionType(ExprType.ARRAY, null, DOUBLE);
   public static final ExpressionType NESTED_DATA =
-      fromColumnTypeStrict(ColumnType.NESTED_DATA);
+      ExpressionType.fromColumnTypeStrict(ColumnType.NESTED_DATA);
   public static final ExpressionType UNKNOWN_COMPLEX =
       new ExpressionType(ExprType.COMPLEX, null, null);
 
diff --git a/processing/src/main/java/org/apache/druid/math/expr/ExpressionTypeConversion.java b/processing/src/main/java/org/apache/druid/math/expr/ExpressionTypeConversion.java
index cffb2c00207..16ae5024830 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/ExpressionTypeConversion.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/ExpressionTypeConversion.java
@@ -241,7 +241,7 @@ public class ExpressionTypeConversion
   @Nullable
   public static ExpressionType integerMathFunction(@Nullable ExpressionType type, @Nullable ExpressionType other)
   {
-    final ExpressionType functionType = function(type, other);
+    final ExpressionType functionType = ExpressionTypeConversion.function(type, other);
     // any number is long
     return Types.isNumeric(functionType) ? ExpressionType.LONG : functionType;
   }
diff --git a/processing/src/main/java/org/apache/druid/math/expr/Parser.java b/processing/src/main/java/org/apache/druid/math/expr/Parser.java
index 80bd58ad4ec..e92dd130b7c 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/Parser.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/Parser.java
@@ -110,7 +110,7 @@ public class Parser
    */
   public static Supplier<Expr> lazyParse(@Nullable String in, ExprMacroTable macroTable)
   {
-    return Suppliers.memoize(() -> in == null ? null : parse(in, macroTable));
+    return Suppliers.memoize(() -> in == null ? null : Parser.parse(in, macroTable));
   }
 
   /**
diff --git a/processing/src/main/java/org/apache/druid/query/JoinDataSource.java b/processing/src/main/java/org/apache/druid/query/JoinDataSource.java
index 440739e7e31..2eb459cf8cc 100644
--- a/processing/src/main/java/org/apache/druid/query/JoinDataSource.java
+++ b/processing/src/main/java/org/apache/druid/query/JoinDataSource.java
@@ -320,7 +320,7 @@ public class JoinDataSource implements DataSource
     DimFilter joinBaseFilter = analysis.getJoinBaseTableFilter().orElse(null);
 
     for (final PreJoinableClause clause : analysis.getPreJoinableClauses()) {
-      current = create(
+      current = JoinDataSource.create(
           current,
           clause.getDataSource(),
           clause.getPrefix(),
diff --git a/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorUtil.java b/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorUtil.java
index c1cc0c5f523..c4c9a7875ef 100755
--- a/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorUtil.java
+++ b/processing/src/main/java/org/apache/druid/query/aggregation/AggregatorUtil.java
@@ -219,7 +219,7 @@ public class AggregatorUtil
   )
   {
 
-    List<PostAggregator> condensedPostAggs = pruneDependentPostAgg(postAggList, metric);
+    List<PostAggregator> condensedPostAggs = AggregatorUtil.pruneDependentPostAgg(postAggList, metric);
     // calculate dependent aggregators for these postAgg
     Set<String> dependencySet = new HashSet<>();
     dependencySet.add(metric);
@@ -427,7 +427,7 @@ public class AggregatorUtil
       return ByteBuffer.allocate(2 + fieldNameBytes.length + expressionBytes.length)
                        .put(aggregatorType)
                        .put(fieldNameBytes)
-                       .put(STRING_SEPARATOR)
+                       .put(AggregatorUtil.STRING_SEPARATOR)
                        .put(expressionBytes)
                        .array();
     });
diff --git a/processing/src/main/java/org/apache/druid/query/aggregation/any/StringAnyAggregatorFactory.java b/processing/src/main/java/org/apache/druid/query/aggregation/any/StringAnyAggregatorFactory.java
index 286ac4d47b7..418bb32f64e 100644
--- a/processing/src/main/java/org/apache/druid/query/aggregation/any/StringAnyAggregatorFactory.java
+++ b/processing/src/main/java/org/apache/druid/query/aggregation/any/StringAnyAggregatorFactory.java
@@ -119,7 +119,7 @@ public class StringAnyAggregatorFactory extends AggregatorFactory
   @Override
   public Comparator getComparator()
   {
-    return VALUE_COMPARATOR;
+    return StringAnyAggregatorFactory.VALUE_COMPARATOR;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/query/aggregation/firstlast/first/StringFirstAggregatorFactory.java b/processing/src/main/java/org/apache/druid/query/aggregation/firstlast/first/StringFirstAggregatorFactory.java
index 80a4ca8ddce..8ff45a27380 100644
--- a/processing/src/main/java/org/apache/druid/query/aggregation/firstlast/first/StringFirstAggregatorFactory.java
+++ b/processing/src/main/java/org/apache/druid/query/aggregation/firstlast/first/StringFirstAggregatorFactory.java
@@ -150,7 +150,7 @@ public class StringFirstAggregatorFactory extends AggregatorFactory
     this.fieldName = fieldName;
     this.timeColumn = timeColumn == null ? ColumnHolder.TIME_COLUMN_NAME : timeColumn;
     this.maxStringBytes = maxStringBytes == null
-                          ? DEFAULT_MAX_STRING_SIZE
+                          ? StringFirstAggregatorFactory.DEFAULT_MAX_STRING_SIZE
                           : maxStringBytes;
   }
 
diff --git a/processing/src/main/java/org/apache/druid/query/aggregation/post/ArithmeticPostAggregator.java b/processing/src/main/java/org/apache/druid/query/aggregation/post/ArithmeticPostAggregator.java
index 2c343d7062f..468be2b2a62 100644
--- a/processing/src/main/java/org/apache/druid/query/aggregation/post/ArithmeticPostAggregator.java
+++ b/processing/src/main/java/org/apache/druid/query/aggregation/post/ArithmeticPostAggregator.java
@@ -265,7 +265,7 @@ public class ArithmeticPostAggregator implements PostAggregator
     private static final Map<String, Ops> LOOKUP_MAP = new HashMap<>();
 
     static {
-      for (Ops op : values()) {
+      for (Ops op : Ops.values()) {
         LOOKUP_MAP.put(op.getFn(), op);
       }
     }
diff --git a/processing/src/main/java/org/apache/druid/query/datasourcemetadata/DataSourceMetadataQuery.java b/processing/src/main/java/org/apache/druid/query/datasourcemetadata/DataSourceMetadataQuery.java
index e5e6ead376d..5c43c6445bc 100644
--- a/processing/src/main/java/org/apache/druid/query/datasourcemetadata/DataSourceMetadataQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/datasourcemetadata/DataSourceMetadataQuery.java
@@ -69,7 +69,7 @@ public class DataSourceMetadataQuery extends BaseQuery<Result<DataSourceMetadata
   @Override
   public String getType()
   {
-    return DATASOURCE_METADATA;
+    return Query.DATASOURCE_METADATA;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/query/filter/InDimFilter.java b/processing/src/main/java/org/apache/druid/query/filter/InDimFilter.java
index 36b4cb9b44b..d678f4b53f1 100644
--- a/processing/src/main/java/org/apache/druid/query/filter/InDimFilter.java
+++ b/processing/src/main/java/org/apache/druid/query/filter/InDimFilter.java
@@ -789,7 +789,7 @@ public class InDimFilter extends AbstractOptimizableDimFilter implements Filter
      */
     public static ValuesSet of(@Nullable final String value)
     {
-      final ValuesSet retVal = create();
+      final ValuesSet retVal = ValuesSet.create();
       retVal.add(NullHandling.emptyToNullIfNeeded(value));
       return retVal;
     }
diff --git a/processing/src/main/java/org/apache/druid/query/groupby/GroupByQuery.java b/processing/src/main/java/org/apache/druid/query/groupby/GroupByQuery.java
index 05416039be7..79282735f38 100644
--- a/processing/src/main/java/org/apache/druid/query/groupby/GroupByQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/groupby/GroupByQuery.java
@@ -1196,7 +1196,7 @@ public class GroupByQuery extends BaseQuery<ResultRow>
 
     public Builder queryId(String queryId)
     {
-      context = computeOverriddenContext(context, ImmutableMap.of(QUERY_ID, queryId));
+      context = BaseQuery.computeOverriddenContext(context, ImmutableMap.of(BaseQuery.QUERY_ID, queryId));
       return this;
     }
 
diff --git a/processing/src/main/java/org/apache/druid/query/groupby/GroupingEngine.java b/processing/src/main/java/org/apache/druid/query/groupby/GroupingEngine.java
index f53c64a566e..5dc995b5538 100644
--- a/processing/src/main/java/org/apache/druid/query/groupby/GroupingEngine.java
+++ b/processing/src/main/java/org/apache/druid/query/groupby/GroupingEngine.java
@@ -502,7 +502,7 @@ public class GroupingEngine
     closer.register(bufferHolder);
     try {
       final String fudgeTimestampString = NullHandling.emptyToNullIfNeeded(
-          query.context().getString(CTX_KEY_FUDGE_TIMESTAMP)
+          query.context().getString(GroupingEngine.CTX_KEY_FUDGE_TIMESTAMP)
       );
 
       final DateTime fudgeTimestamp = fudgeTimestampString == null
diff --git a/processing/src/main/java/org/apache/druid/query/groupby/ResultRow.java b/processing/src/main/java/org/apache/druid/query/groupby/ResultRow.java
index 1232fc7c591..977cba96034 100644
--- a/processing/src/main/java/org/apache/druid/query/groupby/ResultRow.java
+++ b/processing/src/main/java/org/apache/druid/query/groupby/ResultRow.java
@@ -91,7 +91,7 @@ public final class ResultRow
   public static ResultRow fromLegacyRow(Row row, final GroupByQuery query)
   {
     // Can't be sure if we'll get result rows with or without postaggregations, so be safe.
-    final ResultRow resultRow = create(query.getResultRowSizeWithPostAggregators());
+    final ResultRow resultRow = ResultRow.create(query.getResultRowSizeWithPostAggregators());
 
     int i = 0;
     if (query.getResultRowHasTimestamp()) {
diff --git a/processing/src/main/java/org/apache/druid/query/groupby/epinephelinae/RowBasedGrouperHelper.java b/processing/src/main/java/org/apache/druid/query/groupby/epinephelinae/RowBasedGrouperHelper.java
index 02e7fea12f5..96e4e9d2438 100644
--- a/processing/src/main/java/org/apache/druid/query/groupby/epinephelinae/RowBasedGrouperHelper.java
+++ b/processing/src/main/java/org/apache/druid/query/groupby/epinephelinae/RowBasedGrouperHelper.java
@@ -449,7 +449,7 @@ public class RowBasedGrouperHelper
     final ColumnSelectorFactory columnSelectorFactory =
         query.getVirtualColumns()
              .wrap(
-                 createResultRowBasedColumnSelectorFactory(
+                 RowBasedGrouperHelper.createResultRowBasedColumnSelectorFactory(
                      subquery,
                      rowSupplier,
                      RowSignature.Finalization.UNKNOWN
diff --git a/processing/src/main/java/org/apache/druid/query/groupby/orderby/OrderByColumnSpec.java b/processing/src/main/java/org/apache/druid/query/groupby/orderby/OrderByColumnSpec.java
index 67cfcfc16c7..5dbe2abf94f 100644
--- a/processing/src/main/java/org/apache/druid/query/groupby/orderby/OrderByColumnSpec.java
+++ b/processing/src/main/java/org/apache/druid/query/groupby/orderby/OrderByColumnSpec.java
@@ -55,7 +55,7 @@ public class OrderByColumnSpec
     private static final Map<String, Direction> STUPID_ENUM_MAP;
     static {
       final ImmutableMap.Builder<String, Direction> bob = ImmutableMap.builder();
-      for (Direction direction : values()) {
+      for (Direction direction : Direction.values()) {
         bob.put(direction.name(), direction);
       }
       STUPID_ENUM_MAP = bob.build();
@@ -75,7 +75,7 @@ public class OrderByColumnSpec
       Direction direction = STUPID_ENUM_MAP.get(upperName);
 
       if (direction == null) {
-        for (Direction dir : values()) {
+        for (Direction dir : Direction.values()) {
           if (dir.name().startsWith(upperName)) {
             if (direction != null) {
               throw new ISE("Ambiguous directions[%s] and [%s]", direction, dir);
diff --git a/processing/src/main/java/org/apache/druid/query/metadata/metadata/ColumnAnalysis.java b/processing/src/main/java/org/apache/druid/query/metadata/metadata/ColumnAnalysis.java
index b5df9e212a2..131920177d3 100644
--- a/processing/src/main/java/org/apache/druid/query/metadata/metadata/ColumnAnalysis.java
+++ b/processing/src/main/java/org/apache/druid/query/metadata/metadata/ColumnAnalysis.java
@@ -151,7 +151,7 @@ public class ColumnAnalysis
     }
 
     if (isError() && rhs.isError()) {
-      return errorMessage.equals(rhs.getErrorMessage()) ? this : error("multiple_errors");
+      return errorMessage.equals(rhs.getErrorMessage()) ? this : ColumnAnalysis.error("multiple_errors");
     } else if (isError()) {
       return this;
     } else if (rhs.isError()) {
@@ -159,13 +159,13 @@ public class ColumnAnalysis
     }
 
     if (!Objects.equals(type, rhs.getType())) {
-      return error(
+      return ColumnAnalysis.error(
           StringUtils.format("cannot_merge_diff_types: [%s] and [%s]", type, rhs.getType())
       );
     }
 
     if (!Objects.equals(typeSignature, rhs.getTypeSignature())) {
-      return error(
+      return ColumnAnalysis.error(
           StringUtils.format(
               "cannot_merge_diff_types: [%s] and [%s]",
               typeSignature.asTypeString(),
diff --git a/processing/src/main/java/org/apache/druid/query/metadata/metadata/SegmentMetadataQuery.java b/processing/src/main/java/org/apache/druid/query/metadata/metadata/SegmentMetadataQuery.java
index 1e365ea4b51..f2d434bab8a 100644
--- a/processing/src/main/java/org/apache/druid/query/metadata/metadata/SegmentMetadataQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/metadata/metadata/SegmentMetadataQuery.java
@@ -164,7 +164,7 @@ public class SegmentMetadataQuery extends BaseQuery<SegmentAnalysis>
   @Override
   public String getType()
   {
-    return SEGMENT_METADATA;
+    return Query.SEGMENT_METADATA;
   }
 
   @JsonProperty
diff --git a/processing/src/main/java/org/apache/druid/query/operator/WindowOperatorQuery.java b/processing/src/main/java/org/apache/druid/query/operator/WindowOperatorQuery.java
index 97d053491eb..79a8ebdb19d 100644
--- a/processing/src/main/java/org/apache/druid/query/operator/WindowOperatorQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/operator/WindowOperatorQuery.java
@@ -186,7 +186,7 @@ public class WindowOperatorQuery extends BaseQuery<RowsAndColumns>
   @Override
   public String getType()
   {
-    return WINDOW_OPERATOR;
+    return Query.WINDOW_OPERATOR;
   }
 
 
diff --git a/processing/src/main/java/org/apache/druid/query/ordering/StringComparators.java b/processing/src/main/java/org/apache/druid/query/ordering/StringComparators.java
index eb44210d911..650b259ed56 100644
--- a/processing/src/main/java/org/apache/druid/query/ordering/StringComparators.java
+++ b/processing/src/main/java/org/apache/druid/query/ordering/StringComparators.java
@@ -98,7 +98,7 @@ public class StringComparators
     @Override
     public String toString()
     {
-      return LEXICOGRAPHIC_NAME;
+      return StringComparators.LEXICOGRAPHIC_NAME;
     }
 
     @Override
@@ -286,7 +286,7 @@ public class StringComparators
     @Override
     public String toString()
     {
-      return ALPHANUMERIC_NAME;
+      return StringComparators.ALPHANUMERIC_NAME;
     }
 
     @Override
@@ -340,7 +340,7 @@ public class StringComparators
     @Override
     public String toString()
     {
-      return STRLEN_NAME;
+      return StringComparators.STRLEN_NAME;
     }
 
     @Override
@@ -404,7 +404,7 @@ public class StringComparators
 
       if (bd1 == null && bd2 == null) {
         // both Strings are unparseable, just compare lexicographically to have a well-defined ordering
-        return LEXICOGRAPHIC.compare(o1, o2);
+        return StringComparators.LEXICOGRAPHIC.compare(o1, o2);
       }
 
       if (bd1 == null) {
@@ -417,7 +417,7 @@ public class StringComparators
     @Override
     public String toString()
     {
-      return NUMERIC_NAME;
+      return StringComparators.NUMERIC_NAME;
     }
 
     @Override
@@ -469,7 +469,7 @@ public class StringComparators
     @Override
     public String toString()
     {
-      return VERSION_NAME;
+      return StringComparators.VERSION_NAME;
     }
 
     @Override
@@ -520,7 +520,7 @@ public class StringComparators
     @Override
     public String toString()
     {
-      return NATURAL_NAME;
+      return StringComparators.NATURAL_NAME;
     }
 
     @Override
diff --git a/processing/src/main/java/org/apache/druid/query/rowsandcols/MapOfColumnsRowsAndColumns.java b/processing/src/main/java/org/apache/druid/query/rowsandcols/MapOfColumnsRowsAndColumns.java
index 48e93f10e75..d6bc1026a98 100644
--- a/processing/src/main/java/org/apache/druid/query/rowsandcols/MapOfColumnsRowsAndColumns.java
+++ b/processing/src/main/java/org/apache/druid/query/rowsandcols/MapOfColumnsRowsAndColumns.java
@@ -205,7 +205,7 @@ public class MapOfColumnsRowsAndColumns implements RowsAndColumns
 
     public MapOfColumnsRowsAndColumns build()
     {
-      return fromMap(cols);
+      return MapOfColumnsRowsAndColumns.fromMap(cols);
     }
   }
 
diff --git a/processing/src/main/java/org/apache/druid/query/search/SearchQuery.java b/processing/src/main/java/org/apache/druid/query/search/SearchQuery.java
index 06ef3aa0a32..aa10b6ab579 100644
--- a/processing/src/main/java/org/apache/druid/query/search/SearchQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/search/SearchQuery.java
@@ -94,7 +94,7 @@ public class SearchQuery extends BaseQuery<Result<SearchResultValue>>
   @Override
   public String getType()
   {
-    return SEARCH;
+    return Query.SEARCH;
   }
 
   @Override
diff --git a/processing/src/main/java/org/apache/druid/query/timeboundary/TimeBoundaryQuery.java b/processing/src/main/java/org/apache/druid/query/timeboundary/TimeBoundaryQuery.java
index 95913b77940..47412f7d7d5 100644
--- a/processing/src/main/java/org/apache/druid/query/timeboundary/TimeBoundaryQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/timeboundary/TimeBoundaryQuery.java
@@ -89,7 +89,7 @@ public class TimeBoundaryQuery extends BaseQuery<Result<TimeBoundaryResultValue>
   @Override
   public String getType()
   {
-    return TIME_BOUNDARY;
+    return Query.TIME_BOUNDARY;
   }
 
   @JsonProperty
diff --git a/processing/src/main/java/org/apache/druid/query/timeseries/TimeseriesQuery.java b/processing/src/main/java/org/apache/druid/query/timeseries/TimeseriesQuery.java
index f85237c8be8..b2165cd5b70 100644
--- a/processing/src/main/java/org/apache/druid/query/timeseries/TimeseriesQuery.java
+++ b/processing/src/main/java/org/apache/druid/query/timeseries/TimeseriesQuery.java
@@ -120,7 +120,7 @@ public class TimeseriesQuery extends BaseQuery<Result<TimeseriesResultValue>>
   @Override
   public String getType()
   {
-    return TIMESERIES;
+    return Query.TIMESERIES;
   }
 
   @JsonProperty
diff --git a/processing/src/main/java/org/apache/druid/query/topn/PooledTopNAlgorithm.java b/processing/src/main/java/org/apache/druid/query/topn/PooledTopNAlgorithm.java
index f31b6c1e656..e79ad59b0fc 100644
--- a/processing/src/main/java/org/apache/druid/query/topn/PooledTopNAlgorithm.java
+++ b/processing/src/main/java/org/apache/druid/query/topn/PooledTopNAlgorithm.java
@@ -81,28 +81,28 @@ public class PooledTopNAlgorithm
   @VisibleForTesting
   static void setSpecializeGeneric1AggPooledTopN(boolean value)
   {
-    SPECIALIZE_GENERIC_ONE_AGG_POOLED_TOPN = value;
+    PooledTopNAlgorithm.SPECIALIZE_GENERIC_ONE_AGG_POOLED_TOPN = value;
     computeSpecializedScanAndAggregateImplementations();
   }
 
   @VisibleForTesting
   static void setSpecializeGeneric2AggPooledTopN(boolean value)
   {
-    SPECIALIZE_GENERIC_TWO_AGG_POOLED_TOPN = value;
+    PooledTopNAlgorithm.SPECIALIZE_GENERIC_TWO_AGG_POOLED_TOPN = value;
     computeSpecializedScanAndAggregateImplementations();
   }
 
   @VisibleForTesting
   static void setSpecializeHistorical1SimpleDoubleAggPooledTopN(boolean value)
   {
-    SPECIALIZE_HISTORICAL_ONE_SIMPLE_DOUBLE_AGG_POOLED_TOPN = value;
+    PooledTopNAlgorithm.SPECIALIZE_HISTORICAL_ONE_SIMPLE_DOUBLE_AGG_POOLED_TOPN = value;
     computeSpecializedScanAndAggregateImplementations();
   }
 
   @VisibleForTesting
   static void setSpecializeHistoricalSingleValueDimSelector1SimpleDoubleAggPooledTopN(boolean value)
   {
-    SPECIALIZE_HISTORICAL_SINGLE_VALUE_DIM_SELECTOR_ONE_SIMPLE_DOUBLE_AGG_POOLED_TOPN = value;
+    PooledTopNAlgorithm.SPECIALIZE_HISTORICAL_SINGLE_VALUE_DIM_SELECTOR_ONE_SIMPLE_DOUBLE_AGG_POOLED_TOPN = value;
     computeSpecializedScanAndAggregateImplementations();
   }
 
diff --git a/processing/src/main/java/org/apache/druid/segment/AutoTypeColumnIndexer.java b/processing/src/main/java/org/apache/druid/segment/AutoTypeColumnIndexer.java
index 1953c887b95..dafd7dc9600 100644
--- a/processing/src/main/java/org/apache/druid/segment/AutoTypeColumnIndexer.java
+++ b/processing/src/main/java/org/apache/druid/segment/AutoTypeColumnIndexer.java
@@ -99,7 +99,7 @@ public class AutoTypeColumnIndexer implements DimensionIndexer<StructuredData, S
         ExprEval<?> eval = ExprEval.bestEffortOf(fieldValue);
         FieldIndexer fieldIndexer = fieldIndexers.get(fieldName);
         if (fieldIndexer == null) {
-          estimatedFieldKeySize += estimateStringSize(fieldName);
+          estimatedFieldKeySize += StructuredDataProcessor.estimateStringSize(fieldName);
           fieldIndexer = new FieldIndexer(globalDictionary);
           fieldIndexers.put(fieldName, fieldIndexer);
         }
@@ -120,7 +120,7 @@ public class AutoTypeColumnIndexer implements DimensionIndexer<StructuredData, S
         final String fieldName = NestedPathFinder.toNormalizedJsonPath(fieldPath);
         FieldIndexer fieldIndexer = fieldIndexers.get(fieldName);
         if (fieldIndexer == null) {
-          estimatedFieldKeySize += estimateStringSize(fieldName);
+          estimatedFieldKeySize += StructuredDataProcessor.estimateStringSize(fieldName);
           fieldIndexer = new FieldIndexer(globalDictionary);
           fieldIndexers.put(fieldName, fieldIndexer);
         }
diff --git a/processing/src/main/java/org/apache/druid/segment/DimensionHandlerUtils.java b/processing/src/main/java/org/apache/druid/segment/DimensionHandlerUtils.java
index 18e1334af44..e129ceb4177 100644
--- a/processing/src/main/java/org/apache/druid/segment/DimensionHandlerUtils.java
+++ b/processing/src/main/java/org/apache/druid/segment/DimensionHandlerUtils.java
@@ -327,7 +327,7 @@ public final class DimensionHandlerUtils
     } else if (valObj instanceof Boolean) {
       return Evals.asLong((Boolean) valObj);
     } else if (valObj instanceof String) {
-      Long ret = getExactLongFromDecimalString((String) valObj);
+      Long ret = DimensionHandlerUtils.getExactLongFromDecimalString((String) valObj);
       if (reportParseExceptions && ret == null) {
         final String message;
         if (objectKey != null) {
@@ -518,7 +518,7 @@ public final class DimensionHandlerUtils
       case ARRAY:
         return coerceToObjectArrayWithElementCoercionFunction(
             obj,
-            x -> convertObjectToType(x, type.getElementType(), reportParseExceptions, fieldName)
+            x -> DimensionHandlerUtils.convertObjectToType(x, type.getElementType(), reportParseExceptions, fieldName)
         );
       case COMPLEX:
         // Can't coerce complex objects, and we shouldn't need to. If in future selectors behave weirdly, or we need to
diff --git a/processing/src/main/java/org/apache/druid/segment/IndexMergerV9.java b/processing/src/main/java/org/apache/druid/segment/IndexMergerV9.java
index 2be3966b650..7da89edaff7 100644
--- a/processing/src/main/java/org/apache/druid/segment/IndexMergerV9.java
+++ b/processing/src/main/java/org/apache/druid/segment/IndexMergerV9.java
@@ -1232,7 +1232,7 @@ public class IndexMergerV9 implements IndexMerger
 
     List<File> tempDirs = new ArrayList<>();
 
-    if (maxColumnsToMerge == UNLIMITED_MAX_COLUMNS_TO_MERGE) {
+    if (maxColumnsToMerge == IndexMerger.UNLIMITED_MAX_COLUMNS_TO_MERGE) {
       return merge(
           indexes,
           rollup,
diff --git a/processing/src/main/java/org/apache/druid/segment/IndexSpec.java b/processing/src/main/java/org/apache/druid/segment/IndexSpec.java
index fcf9677b076..cf9527f4334 100644
--- a/processing/src/main/java/org/apache/druid/segment/IndexSpec.java
+++ b/processing/src/main/java/org/apache/druid/segment/IndexSpec.java
@@ -43,7 +43,7 @@ import java.util.Objects;
  */
 public class IndexSpec
 {
-  public static final IndexSpec DEFAULT = builder().build();
+  public static final IndexSpec DEFAULT = IndexSpec.builder().build();
 
   public static Builder builder()
   {
diff --git a/processing/src/main/java/org/apache/druid/segment/NestedDataColumnIndexerV4.java b/processing/src/main/java/org/apache/druid/segment/NestedDataColumnIndexerV4.java
index 1eef86db7d8..366f5d86278 100644
--- a/processing/src/main/java/org/apache/druid/segment/NestedDataColumnIndexerV4.java
+++ b/processing/src/main/java/org/apache/druid/segment/NestedDataColumnIndexerV4.java
@@ -73,7 +73,7 @@ public class NestedDataColumnIndexerV4 implements DimensionIndexer<StructuredDat
         ExprEval<?> eval = ExprEval.bestEffortOf(fieldValue);
         FieldIndexer fieldIndexer = fieldIndexers.get(fieldName);
         if (fieldIndexer == null) {
-          estimatedFieldKeySize += estimateStringSize(fieldName);
+          estimatedFieldKeySize += StructuredDataProcessor.estimateStringSize(fieldName);
           fieldIndexer = new FieldIndexer(globalDictionary);
           fieldIndexers.put(fieldName, fieldIndexer);
         }
diff --git a/processing/src/main/java/org/apache/druid/segment/RowBasedColumnSelectorFactory.java b/processing/src/main/java/org/apache/druid/segment/RowBasedColumnSelectorFactory.java
index 8fff2da8f86..035e036f153 100644
--- a/processing/src/main/java/org/apache/druid/segment/RowBasedColumnSelectorFactory.java
+++ b/processing/src/main/java/org/apache/druid/segment/RowBasedColumnSelectorFactory.java
@@ -298,7 +298,7 @@ public class RowBasedColumnSelectorFactory<T> implements ColumnSelectorFactory
         @Override
         public int getValueCardinality()
         {
-          return CARDINALITY_UNKNOWN;
+          return DimensionDictionarySelector.CARDINALITY_UNKNOWN;
         }
 
         @Override
diff --git a/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilities.java b/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilities.java
index 014dfe2227c..59f0e18c0ae 100644
--- a/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilities.java
+++ b/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilities.java
@@ -119,7 +119,7 @@ public interface ColumnCapabilities extends TypeSignature<ValueType>
 
     public Capable coerceUnknownToBoolean(boolean unknownIsTrue)
     {
-      return this == UNKNOWN ? of(unknownIsTrue) : this;
+      return this == UNKNOWN ? Capable.of(unknownIsTrue) : this;
     }
 
     public Capable and(Capable other)
@@ -146,7 +146,7 @@ public interface ColumnCapabilities extends TypeSignature<ValueType>
     @JsonCreator
     public static Capable ofNullable(@Nullable Boolean bool)
     {
-      return bool == null ? UNKNOWN : of(bool);
+      return bool == null ? Capable.UNKNOWN : of(bool);
     }
 
     @JsonValue
diff --git a/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilitiesImpl.java b/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilitiesImpl.java
index 956352e1c28..f0b13a7115e 100644
--- a/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilitiesImpl.java
+++ b/processing/src/main/java/org/apache/druid/segment/column/ColumnCapabilitiesImpl.java
@@ -110,7 +110,7 @@ public class ColumnCapabilitiesImpl implements ColumnCapabilities
    */
   public static ColumnCapabilitiesImpl createDefault()
   {
-    return snapshot(new ColumnCapabilitiesImpl(), ALL_FALSE);
+    return ColumnCapabilitiesImpl.snapshot(new ColumnCapabilitiesImpl(), ALL_FALSE);
   }
 
   /**
diff --git a/processing/src/main/java/org/apache/druid/segment/column/ColumnType.java b/processing/src/main/java/org/apache/druid/segment/column/ColumnType.java
index 60da75855fc..b670d8f4370 100644
--- a/processing/src/main/java/org/apache/druid/segment/column/ColumnType.java
+++ b/processing/src/main/java/org/apache/druid/segment/column/ColumnType.java
@@ -179,8 +179,8 @@ public class ColumnType extends BaseTypeSignature<ValueType>
     }
     // if either is nested data, use nested data, otherwise error
     if (type.is(ValueType.COMPLEX) || other.is(ValueType.COMPLEX)) {
-      if (NESTED_DATA.equals(type) || NESTED_DATA.equals(other)) {
-        return NESTED_DATA;
+      if (ColumnType.NESTED_DATA.equals(type) || ColumnType.NESTED_DATA.equals(other)) {
+        return ColumnType.NESTED_DATA;
       }
       throw new Types.IncompatibleTypeException(type, other);
     }
@@ -198,14 +198,14 @@ public class ColumnType extends BaseTypeSignature<ValueType>
             (ColumnType) other.getElementType()
         );
 
-        return ofArray(commonElementType);
+        return ColumnType.ofArray(commonElementType);
       } else {
         commonElementType = leastRestrictiveType(
             (ColumnType) type.getElementType(),
             other
         );
       }
-      return ofArray(commonElementType);
+      return ColumnType.ofArray(commonElementType);
     }
     if (other.isArray()) {
       if (type.equals(type.getElementType())) {
@@ -217,22 +217,22 @@ public class ColumnType extends BaseTypeSignature<ValueType>
           type,
           (ColumnType) other.getElementType()
       );
-      return ofArray(commonElementType);
+      return ColumnType.ofArray(commonElementType);
     }
     // if either argument is a string, type becomes a string
     if (Types.is(type, ValueType.STRING) || Types.is(other, ValueType.STRING)) {
-      return STRING;
+      return ColumnType.STRING;
     }
 
     // all numbers win over longs
     if (Types.is(type, ValueType.LONG) && Types.isNullOr(other, ValueType.LONG)) {
-      return LONG;
+      return ColumnType.LONG;
     }
     // doubles win over floats
     if (Types.is(type, ValueType.FLOAT) && Types.isNullOr(other, ValueType.FLOAT)) {
-      return FLOAT;
+      return ColumnType.FLOAT;
     }
-    return DOUBLE;
+    return ColumnType.DOUBLE;
   }
 
 }
diff --git a/processing/src/main/java/org/apache/druid/segment/column/ValueType.java b/processing/src/main/java/org/apache/druid/segment/column/ValueType.java
index 083e87bf5fc..6e114ec8995 100644
--- a/processing/src/main/java/org/apache/druid/segment/column/ValueType.java
+++ b/processing/src/main/java/org/apache/druid/segment/column/ValueType.java
@@ -128,7 +128,7 @@ public enum ValueType implements TypeDescriptor
   @Override
   public boolean isPrimitive()
   {
-    return STRING.equals(this) || isNumeric(this);
+    return this.equals(ValueType.STRING) || isNumeric(this);
   }
 
   @Nullable
@@ -143,11 +143,11 @@ public enum ValueType implements TypeDescriptor
 
   public static boolean isNumeric(ValueType type)
   {
-    return type == LONG || type == FLOAT || type == DOUBLE;
+    return type == ValueType.LONG || type == ValueType.FLOAT || type == ValueType.DOUBLE;
   }
 
   public static boolean isArray(ValueType type)
   {
-    return type == ARRAY;
+    return type == ValueType.ARRAY;
   }
 }
diff --git a/processing/src/main/java/org/apache/druid/segment/data/CompressionFactory.java b/processing/src/main/java/org/apache/druid/segment/data/CompressionFactory.java
index f2320f4bf09..55d4c2d1f88 100644
--- a/processing/src/main/java/org/apache/druid/segment/data/CompressionFactory.java
+++ b/processing/src/main/java/org/apache/druid/segment/data/CompressionFactory.java
@@ -203,7 +203,7 @@ public class CompressionFactory
     static final Map<Byte, LongEncodingFormat> ID_MAP = new HashMap<>();
 
     static {
-      for (LongEncodingFormat format : values()) {
+      for (LongEncodingFormat format : LongEncodingFormat.values()) {
         ID_MAP.put(format.getId(), format);
       }
     }
diff --git a/processing/src/main/java/org/apache/druid/segment/data/CompressionStrategy.java b/processing/src/main/java/org/apache/druid/segment/data/CompressionStrategy.java
index 34eb269851a..18ea27cc404 100644
--- a/processing/src/main/java/org/apache/druid/segment/data/CompressionStrategy.java
+++ b/processing/src/main/java/org/apache/druid/segment/data/CompressionStrategy.java
@@ -158,7 +158,7 @@ public enum CompressionStrategy
   static final Map<Byte, CompressionStrategy> ID_MAP = new HashMap<>();
 
   static {
-    for (CompressionStrategy strategy : values()) {
+    for (CompressionStrategy strategy : CompressionStrategy.values()) {
       ID_MAP.put(strategy.getId(), strategy);
     }
   }
@@ -171,7 +171,7 @@ public enum CompressionStrategy
   // TODO remove this method and change all its callers to use all CompressionStrategy values when NONE type is supported by all types
   public static CompressionStrategy[] noNoneValues()
   {
-    return (CompressionStrategy[]) ArrayUtils.removeElement(values(), NONE);
+    return (CompressionStrategy[]) ArrayUtils.removeElement(CompressionStrategy.values(), NONE);
   }
 
   public interface Decompressor
diff --git a/processing/src/main/java/org/apache/druid/segment/data/FrontCodedIndexed.java b/processing/src/main/java/org/apache/druid/segment/data/FrontCodedIndexed.java
index 4adc39e87aa..58231fd2602 100644
--- a/processing/src/main/java/org/apache/druid/segment/data/FrontCodedIndexed.java
+++ b/processing/src/main/java/org/apache/druid/segment/data/FrontCodedIndexed.java
@@ -83,12 +83,12 @@ public abstract class FrontCodedIndexed implements Indexed<ByteBuffer>
 
   public static byte validateVersion(byte version)
   {
-    if (version != V0 && version != V1) {
+    if (version != FrontCodedIndexed.V0 && version != FrontCodedIndexed.V1) {
       throw new IAE(
           "Unknown format version for FrontCodedIndexed [%s], must be [%s] or [%s]",
           version,
-          V0,
-          V1
+          FrontCodedIndexed.V0,
+          FrontCodedIndexed.V1
       );
     }
     return version;
diff --git a/processing/src/main/java/org/apache/druid/segment/data/Indexed.java b/processing/src/main/java/org/apache/druid/segment/data/Indexed.java
index a2fffd81cb8..9c1b3672007 100644
--- a/processing/src/main/java/org/apache/druid/segment/data/Indexed.java
+++ b/processing/src/main/java/org/apache/druid/segment/data/Indexed.java
@@ -53,7 +53,7 @@ public interface Indexed<T> extends Iterable<T>, HotLoopCallee
       @Override
       public T get(int index)
       {
-        checkIndex(index, 0);
+        Indexed.checkIndex(index, 0);
         return null;
       }
 
diff --git a/processing/src/main/java/org/apache/druid/segment/filter/Filters.java b/processing/src/main/java/org/apache/druid/segment/filter/Filters.java
index 1d83e2eda11..1c0893b4a05 100644
--- a/processing/src/main/java/org/apache/druid/segment/filter/Filters.java
+++ b/processing/src/main/java/org/apache/druid/segment/filter/Filters.java
@@ -164,7 +164,7 @@ public class Filters
     }
     boolean useCNF = query.context().getBoolean(QueryContexts.USE_FILTER_CNF_KEY, QueryContexts.DEFAULT_USE_FILTER_CNF);
     try {
-      return useCNF ? toCnf(filter) : filter;
+      return useCNF ? Filters.toCnf(filter) : filter;
     }
     catch (CNFFilterExplosionException cnfFilterExplosionException) {
       return filter; // cannot convert to CNF, return the filter as is
@@ -321,7 +321,7 @@ public class Filters
    */
   public static List<Filter> toNormalizedOrClauses(Filter filter) throws CNFFilterExplosionException
   {
-    Filter normalizedFilter = toCnf(filter);
+    Filter normalizedFilter = Filters.toCnf(filter);
 
     // List of candidates for pushdown
     // CNF normalization will generate either
diff --git a/processing/src/main/java/org/apache/druid/segment/filter/ValueMatchers.java b/processing/src/main/java/org/apache/druid/segment/filter/ValueMatchers.java
index a543f56fa9f..344fbbb70cb 100644
--- a/processing/src/main/java/org/apache/druid/segment/filter/ValueMatchers.java
+++ b/processing/src/main/java/org/apache/druid/segment/filter/ValueMatchers.java
@@ -411,7 +411,7 @@ public class ValueMatchers
       final int nullId = lookup.lookupId(null);
       if (nullId < 0) {
         // column doesn't have null value so no unknowns, can safely return always false matcher
-        return allFalse();
+        return ValueMatchers.allFalse();
       }
       if (multiValue) {
         return new ValueMatcher()
diff --git a/processing/src/main/java/org/apache/druid/segment/index/IndexedUtf8ValueIndexes.java b/processing/src/main/java/org/apache/druid/segment/index/IndexedUtf8ValueIndexes.java
index 4476d70f112..a9819fd75cb 100644
--- a/processing/src/main/java/org/apache/druid/segment/index/IndexedUtf8ValueIndexes.java
+++ b/processing/src/main/java/org/apache/druid/segment/index/IndexedUtf8ValueIndexes.java
@@ -241,7 +241,7 @@ public final class IndexedUtf8ValueIndexes<TDictionary extends Indexed<ByteBuffe
       } else {
         tailSet = baseSet;
       }
-      if (tailSet.size() > SORTED_SCAN_RATIO_THRESHOLD * dictionary.size()) {
+      if (tailSet.size() > ValueSetIndexes.SORTED_SCAN_RATIO_THRESHOLD * dictionary.size()) {
         return ValueSetIndexes.buildBitmapColumnIndexFromSortedIteratorScan(
             bitmapFactory,
             ByteBufferUtils.utf8Comparator(),
diff --git a/processing/src/main/java/org/apache/druid/segment/nested/FieldTypeInfo.java b/processing/src/main/java/org/apache/druid/segment/nested/FieldTypeInfo.java
index 7750b864544..b00af7a132f 100644
--- a/processing/src/main/java/org/apache/druid/segment/nested/FieldTypeInfo.java
+++ b/processing/src/main/java/org/apache/druid/segment/nested/FieldTypeInfo.java
@@ -253,7 +253,7 @@ public class FieldTypeInfo
       byte typeByte = types.getByteValue();
       // adjust for empty array if needed
       if (types.hasUntypedArray()) {
-        Set<ColumnType> columnTypes = convertToSet(types.getByteValue());
+        Set<ColumnType> columnTypes = FieldTypeInfo.convertToSet(types.getByteValue());
         ColumnType leastRestrictive = null;
         for (ColumnType type : columnTypes) {
           leastRestrictive = ColumnType.leastRestrictiveType(leastRestrictive, type);
diff --git a/processing/src/main/java/org/apache/druid/segment/nested/NestedCommonFormatColumnSerializer.java b/processing/src/main/java/org/apache/druid/segment/nested/NestedCommonFormatColumnSerializer.java
index acaa9a32c12..88b5c240e1b 100644
--- a/processing/src/main/java/org/apache/druid/segment/nested/NestedCommonFormatColumnSerializer.java
+++ b/processing/src/main/java/org/apache/druid/segment/nested/NestedCommonFormatColumnSerializer.java
@@ -88,7 +88,7 @@ public abstract class NestedCommonFormatColumnSerializer implements GenericColum
 
   public static void writeV0Header(WritableByteChannel channel, ByteBuffer columnNameBuffer) throws IOException
   {
-    channel.write(ByteBuffer.wrap(new byte[]{V0}));
+    channel.write(ByteBuffer.wrap(new byte[]{NestedCommonFormatColumnSerializer.V0}));
     channel.write(columnNameBuffer);
   }
 
diff --git a/processing/src/main/java/org/apache/druid/segment/nested/NestedFieldColumnIndexSupplier.java b/processing/src/main/java/org/apache/druid/segment/nested/NestedFieldColumnIndexSupplier.java
index f3290759553..3947013274c 100644
--- a/processing/src/main/java/org/apache/druid/segment/nested/NestedFieldColumnIndexSupplier.java
+++ b/processing/src/main/java/org/apache/druid/segment/nested/NestedFieldColumnIndexSupplier.java
@@ -1314,7 +1314,7 @@ public class NestedFieldColumnIndexSupplier<TStringDictionary extends Indexed<By
         @Override
         public int estimatedComputeCost()
         {
-          return INDEX_COMPUTE_SCALE;
+          return NestedVariantIndexes.INDEX_COMPUTE_SCALE;
         }
 
         @Override
@@ -1357,10 +1357,10 @@ public class NestedFieldColumnIndexSupplier<TStringDictionary extends Indexed<By
         @Override
         public int estimatedComputeCost()
         {
-          if (values.size() >= Integer.MAX_VALUE / INDEX_COMPUTE_SCALE) {
+          if (values.size() >= Integer.MAX_VALUE / NestedVariantIndexes.INDEX_COMPUTE_SCALE) {
             return Integer.MAX_VALUE;
           }
-          return values.size() * INDEX_COMPUTE_SCALE;
+          return values.size() * NestedVariantIndexes.INDEX_COMPUTE_SCALE;
         }
 
         @Override
diff --git a/processing/src/main/java/org/apache/druid/segment/nested/ScalarDoubleColumnAndIndexSupplier.java b/processing/src/main/java/org/apache/druid/segment/nested/ScalarDoubleColumnAndIndexSupplier.java
index 4c52eb2810d..8d1dd422773 100644
--- a/processing/src/main/java/org/apache/druid/segment/nested/ScalarDoubleColumnAndIndexSupplier.java
+++ b/processing/src/main/java/org/apache/druid/segment/nested/ScalarDoubleColumnAndIndexSupplier.java
@@ -323,7 +323,7 @@ public class ScalarDoubleColumnAndIndexSupplier implements Supplier<NestedCommon
         final List<Double> tailSet;
         final List<Double> baseSet = (List<Double>) sortedValues;
 
-        if (sortedValues.size() >= SIZE_WORTH_CHECKING_MIN) {
+        if (sortedValues.size() >= ValueSetIndexes.SIZE_WORTH_CHECKING_MIN) {
           final double minValueInColumn = dictionary.get(0) == null ? dictionary.get(1) : dictionary.get(0);
           final int position = Collections.binarySearch(
               sortedValues,
@@ -335,7 +335,7 @@ public class ScalarDoubleColumnAndIndexSupplier implements Supplier<NestedCommon
         } else {
           tailSet = baseSet;
         }
-        if (tailSet.size() > SORTED_SCAN_RATIO_THRESHOLD * dictionary.size()) {
+        if (tailSet.size() > ValueSetIndexes.SORTED_SCAN_RATIO_THRESHOLD * dictionary.size()) {
           return ValueSetIndexes.buildBitmapColumnIndexFromSortedIteratorScan(
               bitmapFactory,
               ColumnType.DOUBLE.getNullableStrategy(),
diff --git a/processing/src/main/java/org/apache/druid/segment/nested/ScalarLongColumnAndIndexSupplier.java b/processing/src/main/java/org/apache/druid/segment/nested/ScalarLongColumnAndIndexSupplier.java
index 1e572f6069e..5a55a5f7c14 100644
--- a/processing/src/main/java/org/apache/druid/segment/nested/ScalarLongColumnAndIndexSupplier.java
+++ b/processing/src/main/java/org/apache/druid/segment/nested/ScalarLongColumnAndIndexSupplier.java
@@ -321,7 +321,7 @@ public class ScalarLongColumnAndIndexSupplier implements Supplier<NestedCommonFo
         final List<Long> tailSet;
         final List<Long> baseSet = (List<Long>) sortedValues;
 
-        if (sortedValues.size() >= SIZE_WORTH_CHECKING_MIN) {
+        if (sortedValues.size() >= ValueSetIndexes.SIZE_WORTH_CHECKING_MIN) {
           final long minValueInColumn = dictionary.get(0) == null ? dictionary.get(1) : dictionary.get(0);
           final int position = Collections.binarySearch(
               sortedValues,
@@ -332,7 +332,7 @@ public class ScalarLongColumnAndIndexSupplier implements Supplier<NestedCommonFo
         } else {
           tailSet = baseSet;
         }
-        if (tailSet.size() > SORTED_SCAN_RATIO_THRESHOLD * dictionary.size()) {
+        if (tailSet.size() > ValueSetIndexes.SORTED_SCAN_RATIO_THRESHOLD * dictionary.size()) {
           return ValueSetIndexes.buildBitmapColumnIndexFromSortedIteratorScan(
               bitmapFactory,
               ColumnType.LONG.getNullableStrategy(),
diff --git a/processing/src/main/java/org/apache/druid/segment/serde/DictionaryEncodedColumnPartSerde.java b/processing/src/main/java/org/apache/druid/segment/serde/DictionaryEncodedColumnPartSerde.java
index 536b562ebda..02e7f5b4d39 100644
--- a/processing/src/main/java/org/apache/druid/segment/serde/DictionaryEncodedColumnPartSerde.java
+++ b/processing/src/main/java/org/apache/druid/segment/serde/DictionaryEncodedColumnPartSerde.java
@@ -91,7 +91,7 @@ public class DictionaryEncodedColumnPartSerde implements ColumnPartSerde
 
     public static VERSION fromByte(byte b)
     {
-      final VERSION[] values = values();
+      final VERSION[] values = VERSION.values();
       Preconditions.checkArgument(b < values.length, "Unsupported dictionary column version[%s]", b);
       return values[b];
     }
diff --git a/processing/src/main/java/org/apache/druid/segment/virtual/ExpressionMultiValueDimensionSelector.java b/processing/src/main/java/org/apache/druid/segment/virtual/ExpressionMultiValueDimensionSelector.java
index a9773551d2b..dd70b3566e1 100644
--- a/processing/src/main/java/org/apache/druid/segment/virtual/ExpressionMultiValueDimensionSelector.java
+++ b/processing/src/main/java/org/apache/druid/segment/virtual/ExpressionMultiValueDimensionSelector.java
@@ -252,7 +252,7 @@ public class ExpressionMultiValueDimensionSelector implements DimensionSelector
     @Override
     String getArrayValue(ExprEval evaluated, int i)
     {
-      return extractionFn.apply(getArrayElement(evaluated, i));
+      return extractionFn.apply(ExpressionMultiValueDimensionSelector.getArrayElement(evaluated, i));
     }
 
     @Override
diff --git a/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionSelector.java b/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionSelector.java
index 88dc833a250..b8a4e2d82f9 100644
--- a/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionSelector.java
+++ b/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionSelector.java
@@ -26,6 +26,7 @@ import org.apache.druid.math.expr.ExpressionType;
 import org.apache.druid.query.filter.DruidPredicateFactory;
 import org.apache.druid.query.filter.ValueMatcher;
 import org.apache.druid.query.monomorphicprocessing.RuntimeShapeInspector;
+import org.apache.druid.segment.DimensionDictionarySelector;
 import org.apache.druid.segment.DimensionSelector;
 import org.apache.druid.segment.DimensionSelectorUtils;
 import org.apache.druid.segment.IdLookup;
@@ -56,7 +57,7 @@ public class SingleStringInputDeferredEvaluationExpressionDimensionSelector impl
   )
   {
     // Verify selector has a working dictionary.
-    if (selector.getValueCardinality() == CARDINALITY_UNKNOWN
+    if (selector.getValueCardinality() == DimensionDictionarySelector.CARDINALITY_UNKNOWN
         || !selector.nameLookupPossibleInAdvance()) {
       throw new ISE("Selector of class[%s] does not have a dictionary, cannot use it.", selector.getClass().getName());
     }
diff --git a/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector.java b/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector.java
index 47586c753b5..5a1dd495506 100644
--- a/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector.java
+++ b/processing/src/main/java/org/apache/druid/segment/virtual/SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector.java
@@ -24,6 +24,7 @@ import org.apache.druid.math.expr.Evals;
 import org.apache.druid.math.expr.Expr;
 import org.apache.druid.math.expr.ExpressionType;
 import org.apache.druid.math.expr.vector.ExprVectorProcessor;
+import org.apache.druid.segment.DimensionDictionarySelector;
 import org.apache.druid.segment.IdLookup;
 import org.apache.druid.segment.vector.SingleValueDimensionVectorSelector;
 
@@ -52,7 +53,7 @@ public class SingleStringInputDeferredEvaluationExpressionDimensionVectorSelecto
   )
   {
     // Verify selector has a working dictionary.
-    if (selector.getValueCardinality() == CARDINALITY_UNKNOWN
+    if (selector.getValueCardinality() == DimensionDictionarySelector.CARDINALITY_UNKNOWN
         || !selector.nameLookupPossibleInAdvance()) {
       throw new ISE(
           "Selector of class[%s] does not have a dictionary, cannot use it.",
diff --git a/quidem-ut/src/main/java/org/apache/druid/quidem/ExposedAsBrokerQueryComponentSupplierWrapper.java b/quidem-ut/src/main/java/org/apache/druid/quidem/ExposedAsBrokerQueryComponentSupplierWrapper.java
index b564fbdc50b..d1fa6a349ba 100644
--- a/quidem-ut/src/main/java/org/apache/druid/quidem/ExposedAsBrokerQueryComponentSupplierWrapper.java
+++ b/quidem-ut/src/main/java/org/apache/druid/quidem/ExposedAsBrokerQueryComponentSupplierWrapper.java
@@ -123,7 +123,7 @@ public class ExposedAsBrokerQueryComponentSupplierWrapper extends QueryComponent
     installForServerModules(builder);
     builder.add(new QueryRunnerFactoryModule());
 
-    overrideModules.addAll(brokerModules());
+    overrideModules.addAll(ExposedAsBrokerQueryComponentSupplierWrapper.brokerModules());
     overrideModules.add(new BrokerTestModule());
     builder.add(QuidemCaptureModule.class);
   }
diff --git a/quidem-ut/src/main/java/org/apache/druid/quidem/QuidemRecorder.java b/quidem-ut/src/main/java/org/apache/druid/quidem/QuidemRecorder.java
index dc34b25697c..d95de9f3f76 100644
--- a/quidem-ut/src/main/java/org/apache/druid/quidem/QuidemRecorder.java
+++ b/quidem-ut/src/main/java/org/apache/druid/quidem/QuidemRecorder.java
@@ -53,7 +53,7 @@ public class QuidemRecorder implements AutoCloseable, DruidHook<String>
     printStream.println("#started " + new Date());
     printStream.println("!use " + quidemURI);
     printStream.println("!set outputformat mysql");
-    hookDispatcher.register(SQL, this);
+    hookDispatcher.register(DruidHook.SQL, this);
   }
 
   @Override
@@ -63,13 +63,13 @@ public class QuidemRecorder implements AutoCloseable, DruidHook<String>
       printStream.close();
       printStream = null;
     }
-    hookDispatcher.unregister(SQL, this);
+    hookDispatcher.unregister(DruidHook.SQL, this);
   }
 
   @Override
   public synchronized void invoke(HookKey<String> key, String query)
   {
-    if (SQL.equals(key)) {
+    if (DruidHook.SQL.equals(key)) {
       if (queries.contains(query)) {
         // ignore duplicate queries
         return;
diff --git a/server/src/main/java/org/apache/druid/catalog/model/CatalogUtils.java b/server/src/main/java/org/apache/druid/catalog/model/CatalogUtils.java
index 88cfcc1a587..d0ac6c31e76 100644
--- a/server/src/main/java/org/apache/druid/catalog/model/CatalogUtils.java
+++ b/server/src/main/java/org/apache/druid/catalog/model/CatalogUtils.java
@@ -203,7 +203,7 @@ public class CatalogUtils
    */
   public static String getNonBlankString(Map<String, Object> args, String parameter)
   {
-    String value = getString(args, parameter);
+    String value = CatalogUtils.getString(args, parameter);
     if (value != null) {
       value = value.trim();
       if (value.isEmpty()) {
@@ -215,7 +215,7 @@ public class CatalogUtils
 
   public static List<String> getUriListArg(Map<String, Object> args, String parameter)
   {
-    String urisString = getString(args, parameter);
+    String urisString = CatalogUtils.getString(args, parameter);
     if (Strings.isNullOrEmpty(urisString)) {
       throw new IAE("One or more values are required for parameter %s", parameter);
     }
diff --git a/server/src/main/java/org/apache/druid/catalog/model/table/DatasourceDefn.java b/server/src/main/java/org/apache/druid/catalog/model/table/DatasourceDefn.java
index e349ffb7ede..297188dd9cc 100644
--- a/server/src/main/java/org/apache/druid/catalog/model/table/DatasourceDefn.java
+++ b/server/src/main/java/org/apache/druid/catalog/model/table/DatasourceDefn.java
@@ -158,7 +158,7 @@ public class DatasourceDefn extends TableDefn
 
   public static boolean isDatasource(String tableType)
   {
-    return TABLE_TYPE.equals(tableType);
+    return DatasourceDefn.TABLE_TYPE.equals(tableType);
   }
 
   public static boolean isDatasource(ResolvedTable table)
diff --git a/server/src/main/java/org/apache/druid/discovery/DruidNodeDiscoveryProvider.java b/server/src/main/java/org/apache/druid/discovery/DruidNodeDiscoveryProvider.java
index 42abbb23f2a..44ce7ff9824 100644
--- a/server/src/main/java/org/apache/druid/discovery/DruidNodeDiscoveryProvider.java
+++ b/server/src/main/java/org/apache/druid/discovery/DruidNodeDiscoveryProvider.java
@@ -67,7 +67,7 @@ public abstract class DruidNodeDiscoveryProvider
         serviceName,
         service -> {
 
-          Set<NodeRole> nodeRolesToWatch = SERVICE_TO_NODE_TYPES.get(service);
+          Set<NodeRole> nodeRolesToWatch = DruidNodeDiscoveryProvider.SERVICE_TO_NODE_TYPES.get(service);
           if (nodeRolesToWatch == null) {
             throw new IAE("Unknown service [%s].", service);
           }
diff --git a/server/src/main/java/org/apache/druid/guice/DruidBinders.java b/server/src/main/java/org/apache/druid/guice/DruidBinders.java
index b243930d619..fbec4f6219f 100644
--- a/server/src/main/java/org/apache/druid/guice/DruidBinders.java
+++ b/server/src/main/java/org/apache/druid/guice/DruidBinders.java
@@ -75,7 +75,7 @@ public class DruidBinders
     public QueryLogicBinder(Binder binder)
     {
       this.binder = binder;
-      queryLogicMapBinder = queryLogicBinderType(binder);
+      queryLogicMapBinder = DruidBinders.queryLogicBinderType(binder);
     }
 
     QueryLogicBinder bindQueryLogic(
diff --git a/server/src/main/java/org/apache/druid/metadata/SortOrder.java b/server/src/main/java/org/apache/druid/metadata/SortOrder.java
index d7e0de4677d..afabd0cde59 100644
--- a/server/src/main/java/org/apache/druid/metadata/SortOrder.java
+++ b/server/src/main/java/org/apache/druid/metadata/SortOrder.java
@@ -53,14 +53,14 @@ public enum SortOrder
   @JsonCreator
   public static SortOrder fromValue(String value)
   {
-    for (SortOrder b : values()) {
+    for (SortOrder b : SortOrder.values()) {
       if (String.valueOf(b.value).equalsIgnoreCase(String.valueOf(value))) {
         return b;
       }
     }
     throw InvalidInput.exception(StringUtils.format(
         "Unexpected value[%s] for SortOrder. Possible values are: %s",
-        value, Arrays.stream(values()).map(SortOrder::toString).collect(Collectors.toList())
+        value, Arrays.stream(SortOrder.values()).map(SortOrder::toString).collect(Collectors.toList())
     ));
   }
 }
diff --git a/server/src/main/java/org/apache/druid/rpc/guice/ServiceClientModule.java b/server/src/main/java/org/apache/druid/rpc/guice/ServiceClientModule.java
index 52b2e837915..a0d9a5e3725 100644
--- a/server/src/main/java/org/apache/druid/rpc/guice/ServiceClientModule.java
+++ b/server/src/main/java/org/apache/druid/rpc/guice/ServiceClientModule.java
@@ -139,7 +139,7 @@ public class ServiceClientModule implements DruidModule
         clientFactory.makeClient(
             NodeRole.BROKER.getJsonName(),
             serviceLocator,
-            StandardRetryPolicy.builder().maxAttempts(CLIENT_MAX_ATTEMPTS).build()
+            StandardRetryPolicy.builder().maxAttempts(ServiceClientModule.CLIENT_MAX_ATTEMPTS).build()
         ),
         jsonMapper
     );
diff --git a/server/src/main/java/org/apache/druid/server/compaction/CompactionStatus.java b/server/src/main/java/org/apache/druid/server/compaction/CompactionStatus.java
index a2e6385b46f..fd53ed38c25 100644
--- a/server/src/main/java/org/apache/druid/server/compaction/CompactionStatus.java
+++ b/server/src/main/java/org/apache/druid/server/compaction/CompactionStatus.java
@@ -140,7 +140,7 @@ public class CompactionStatus
       Function<T, String> stringFunction
   )
   {
-    return incomplete(
+    return CompactionStatus.incomplete(
         "'%s' mismatch: required[%s], current[%s]",
         field,
         target == null ? null : stringFunction.apply(target),
@@ -298,7 +298,7 @@ public class CompactionStatus
     private CompactionStatus segmentsHaveBeenCompactedAtLeastOnce()
     {
       if (lastCompactionState == null) {
-        return incomplete("not compacted yet");
+        return CompactionStatus.incomplete("not compacted yet");
       } else {
         return COMPLETE;
       }
@@ -312,7 +312,7 @@ public class CompactionStatus
       if (allHaveSameCompactionState) {
         return COMPLETE;
       } else {
-        return incomplete("segments have different last compaction states");
+        return CompactionStatus.incomplete("segments have different last compaction states");
       }
     }
 
@@ -322,7 +322,7 @@ public class CompactionStatus
       if (existingPartionsSpec instanceof DimensionRangePartitionsSpec) {
         existingPartionsSpec = getEffectiveRangePartitionsSpec((DimensionRangePartitionsSpec) existingPartionsSpec);
       }
-      return completeIfEqual(
+      return CompactionStatus.completeIfEqual(
           "partitionsSpec",
           findPartitionsSpecFromConfig(tuningConfig),
           existingPartionsSpec,
@@ -332,7 +332,7 @@ public class CompactionStatus
 
     private CompactionStatus indexSpecIsUpToDate()
     {
-      return completeIfEqual(
+      return CompactionStatus.completeIfEqual(
           "indexSpec",
           Configs.valueOrDefault(tuningConfig.getIndexSpec(), IndexSpec.DEFAULT),
           objectMapper.convertValue(lastCompactionState.getIndexSpec(), IndexSpec.class),
@@ -360,13 +360,13 @@ public class CompactionStatus
             segment -> !configuredSegmentGranularity.isAligned(segment.getInterval())
         );
         if (needsCompaction) {
-          return incomplete(
+          return CompactionStatus.incomplete(
               "segmentGranularity: segments do not align with target[%s]",
               asString(configuredSegmentGranularity)
           );
         }
       } else {
-        return configChanged(
+        return CompactionStatus.configChanged(
             "segmentGranularity",
             configuredSegmentGranularity,
             existingSegmentGranularity,
@@ -382,7 +382,7 @@ public class CompactionStatus
       if (configuredGranularitySpec == null) {
         return COMPLETE;
       } else {
-        return completeIfEqual(
+        return CompactionStatus.completeIfEqual(
             "rollup",
             configuredGranularitySpec.isRollup(),
             existingGranularitySpec == null ? null : existingGranularitySpec.isRollup(),
@@ -396,7 +396,7 @@ public class CompactionStatus
       if (configuredGranularitySpec == null) {
         return COMPLETE;
       } else {
-        return completeIfEqual(
+        return CompactionStatus.completeIfEqual(
             "queryGranularity",
             configuredGranularitySpec.getQueryGranularity(),
             existingGranularitySpec == null ? null : existingGranularitySpec.getQueryGranularity(),
@@ -426,7 +426,7 @@ public class CompactionStatus
             compactionConfig.getTuningConfig() == null ? null : compactionConfig.getTuningConfig().getPartitionsSpec()
         );
         {
-          return completeIfEqual(
+          return CompactionStatus.completeIfEqual(
               "dimensionsSpec",
               configuredDimensions,
               existingDimensions,
@@ -449,7 +449,7 @@ public class CompactionStatus
             ? null : objectMapper.convertValue(metricSpecList, AggregatorFactory[].class);
 
       if (existingMetricsSpec == null || !Arrays.deepEquals(configuredMetricsSpec, existingMetricsSpec)) {
-        return configChanged(
+        return CompactionStatus.configChanged(
             "metricsSpec",
             configuredMetricsSpec,
             existingMetricsSpec,
@@ -470,7 +470,7 @@ public class CompactionStatus
           lastCompactionState.getTransformSpec(),
           ClientCompactionTaskTransformSpec.class
       );
-      return completeIfEqual(
+      return CompactionStatus.completeIfEqual(
           "transformSpec filter",
           compactionConfig.getTransformSpec().getFilter(),
           existingTransformSpec == null ? null : existingTransformSpec.getFilter(),
diff --git a/server/src/main/java/org/apache/druid/server/coordination/BroadcastDatasourceLoadingSpec.java b/server/src/main/java/org/apache/druid/server/coordination/BroadcastDatasourceLoadingSpec.java
index 28d83adab5b..3a11027311e 100644
--- a/server/src/main/java/org/apache/druid/server/coordination/BroadcastDatasourceLoadingSpec.java
+++ b/server/src/main/java/org/apache/druid/server/coordination/BroadcastDatasourceLoadingSpec.java
@@ -134,7 +134,7 @@ public class BroadcastDatasourceLoadingSpec
       if (broadcastDatasourcesToLoad == null || broadcastDatasourcesToLoad.isEmpty()) {
         throw InvalidInput.exception("Set of broadcast datasources to load cannot be %s for mode[ONLY_REQUIRED].", broadcastDatasourcesToLoad);
       }
-      return loadOnly(new HashSet<>(broadcastDatasourcesToLoad));
+      return BroadcastDatasourceLoadingSpec.loadOnly(new HashSet<>(broadcastDatasourcesToLoad));
     } else {
       return defaultSpec;
     }
diff --git a/server/src/main/java/org/apache/druid/server/coordination/ServerType.java b/server/src/main/java/org/apache/druid/server/coordination/ServerType.java
index 829a662d1af..59d6f6bcc61 100644
--- a/server/src/main/java/org/apache/druid/server/coordination/ServerType.java
+++ b/server/src/main/java/org/apache/druid/server/coordination/ServerType.java
@@ -153,11 +153,11 @@ public enum ServerType
   {
     // this doesn't actually check that the NodeRole is a typical data node
     if (nodeRole.equals(NodeRole.HISTORICAL)) {
-      return HISTORICAL;
+      return ServerType.HISTORICAL;
     } else if (nodeRole.equals(NodeRole.BROKER)) {
-      return BROKER;
+      return ServerType.BROKER;
     } else {
-      return INDEXER_EXECUTOR;
+      return ServerType.INDEXER_EXECUTOR;
     }
   }
 
diff --git a/server/src/main/java/org/apache/druid/server/coordinator/balancer/SegmentToMoveCalculator.java b/server/src/main/java/org/apache/druid/server/coordinator/balancer/SegmentToMoveCalculator.java
index a84d63ebe76..01c7da44c11 100644
--- a/server/src/main/java/org/apache/druid/server/coordinator/balancer/SegmentToMoveCalculator.java
+++ b/server/src/main/java/org/apache/druid/server/coordinator/balancer/SegmentToMoveCalculator.java
@@ -70,8 +70,10 @@ public class SegmentToMoveCalculator
     ).sum();
 
     // Move at least some segments to ensure that the cluster is always balancing itself
-    final int minSegmentsToMove = computeMinSegmentsToMoveInTier(totalSegments);
-    final int segmentsToMoveToFixDeviation = computeNumSegmentsToMoveToBalanceTier(tier, historicals);
+    final int minSegmentsToMove = SegmentToMoveCalculator
+        .computeMinSegmentsToMoveInTier(totalSegments);
+    final int segmentsToMoveToFixDeviation = SegmentToMoveCalculator
+        .computeNumSegmentsToMoveToBalanceTier(tier, historicals);
     log.info(
         "Need to move [%,d] segments in tier[%s] to attain balance. Allowed values are [min=%d, max=%d].",
         segmentsToMoveToFixDeviation, tier, minSegmentsToMove, maxSegmentsToMoveInTier
diff --git a/server/src/main/java/org/apache/druid/server/http/HostAndPortWithScheme.java b/server/src/main/java/org/apache/druid/server/http/HostAndPortWithScheme.java
index 6a76ebc89ff..297e86f3898 100644
--- a/server/src/main/java/org/apache/druid/server/http/HostAndPortWithScheme.java
+++ b/server/src/main/java/org/apache/druid/server/http/HostAndPortWithScheme.java
@@ -47,12 +47,12 @@ public class HostAndPortWithScheme
       if (colonIndex == -1) {
         throw new IAE("Invalid host with scheme string: [%s]", hostPortMaybeSchemeString);
       }
-      return fromString(
+      return HostAndPortWithScheme.fromString(
           hostPortMaybeSchemeString.substring(0, colonIndex),
           hostPortMaybeSchemeString.substring(colonIndex + 1)
       );
     }
-    return fromString("http", hostPortMaybeSchemeString);
+    return HostAndPortWithScheme.fromString("http", hostPortMaybeSchemeString);
   }
 
   public static HostAndPortWithScheme fromString(String scheme, String hostPortString)
diff --git a/server/src/main/java/org/apache/druid/server/initialization/jetty/StandardResponseHeaderFilterHolder.java b/server/src/main/java/org/apache/druid/server/initialization/jetty/StandardResponseHeaderFilterHolder.java
index b6d79e930f4..2f12ff2402c 100644
--- a/server/src/main/java/org/apache/druid/server/initialization/jetty/StandardResponseHeaderFilterHolder.java
+++ b/server/src/main/java/org/apache/druid/server/initialization/jetty/StandardResponseHeaderFilterHolder.java
@@ -73,7 +73,7 @@ public class StandardResponseHeaderFilterHolder implements ServletFilterHolder
       final Response serverResponse
   )
   {
-    for (final String headerName : STANDARD_HEADERS) {
+    for (final String headerName : StandardResponseHeaderFilterHolder.STANDARD_HEADERS) {
       if (serverResponse.getHeaders().containsKey(headerName) && proxyResponse.containsHeader(headerName)) {
         ((org.eclipse.jetty.server.Response) proxyResponse).getHttpFields().remove(headerName);
       }
diff --git a/server/src/main/java/org/apache/druid/server/lookup/cache/LookupLoadingSpec.java b/server/src/main/java/org/apache/druid/server/lookup/cache/LookupLoadingSpec.java
index 2d798e657ea..4665bdd18cf 100644
--- a/server/src/main/java/org/apache/druid/server/lookup/cache/LookupLoadingSpec.java
+++ b/server/src/main/java/org/apache/druid/server/lookup/cache/LookupLoadingSpec.java
@@ -127,7 +127,7 @@ public class LookupLoadingSpec
       if (lookupsToLoad == null || lookupsToLoad.isEmpty()) {
         throw InvalidInput.exception("Set of lookups to load cannot be %s for mode[ONLY_REQUIRED].", lookupsToLoad);
       }
-      return loadOnly(new HashSet<>(lookupsToLoad));
+      return LookupLoadingSpec.loadOnly(new HashSet<>(lookupsToLoad));
     } else {
       return defaultSpec;
     }
diff --git a/server/src/main/java/org/apache/druid/server/metrics/MonitorsConfig.java b/server/src/main/java/org/apache/druid/server/metrics/MonitorsConfig.java
index fd06b3adb83..25e124c1983 100644
--- a/server/src/main/java/org/apache/druid/server/metrics/MonitorsConfig.java
+++ b/server/src/main/java/org/apache/druid/server/metrics/MonitorsConfig.java
@@ -95,8 +95,8 @@ public class MonitorsConfig
   {
     Map<String, String[]> dimensionsMap = new HashMap<>();
     for (String property : props.stringPropertyNames()) {
-      if (property.startsWith(METRIC_DIMENSION_PREFIX)) {
-        String dimension = property.substring(METRIC_DIMENSION_PREFIX.length());
+      if (property.startsWith(MonitorsConfig.METRIC_DIMENSION_PREFIX)) {
+        String dimension = property.substring(MonitorsConfig.METRIC_DIMENSION_PREFIX.length());
         if (dimensions.contains(dimension)) {
           dimensionsMap.put(
               dimension,
diff --git a/server/src/main/java/org/apache/druid/server/security/AuthorizationUtils.java b/server/src/main/java/org/apache/druid/server/security/AuthorizationUtils.java
index af0ba920a85..431819da8a4 100644
--- a/server/src/main/java/org/apache/druid/server/security/AuthorizationUtils.java
+++ b/server/src/main/java/org/apache/druid/server/security/AuthorizationUtils.java
@@ -404,7 +404,7 @@ public class AuthorizationUtils
       throw new ISE("Request already had authorization check.");
     }
 
-    final AuthenticationResult authenticationResult = authenticationResultFromRequest(request);
+    final AuthenticationResult authenticationResult = AuthorizationUtils.authenticationResultFromRequest(request);
 
     Map<KeyType, List<ResType>> filteredResources = new HashMap<>();
     for (Map.Entry<KeyType, List<ResType>> entry : unfilteredResources.entrySet()) {
@@ -413,7 +413,7 @@ public class AuthorizationUtils
       }
 
       final List<ResType> filteredList = Lists.newArrayList(
-          filterAuthorizedResources(
+          AuthorizationUtils.filterAuthorizedResources(
               authenticationResult,
               entry.getValue(),
               resourceActionGenerator,
diff --git a/sql/src/main/java/org/apache/calcite/plan/volcano/DruidVolcanoCost.java b/sql/src/main/java/org/apache/calcite/plan/volcano/DruidVolcanoCost.java
index af57df6f562..c26fe21c692 100644
--- a/sql/src/main/java/org/apache/calcite/plan/volcano/DruidVolcanoCost.java
+++ b/sql/src/main/java/org/apache/calcite/plan/volcano/DruidVolcanoCost.java
@@ -264,25 +264,25 @@ public class DruidVolcanoCost implements RelOptCost
     @Override
     public RelOptCost makeHugeCost()
     {
-      return HUGE;
+      return DruidVolcanoCost.HUGE;
     }
 
     @Override
     public RelOptCost makeInfiniteCost()
     {
-      return INFINITY;
+      return DruidVolcanoCost.INFINITY;
     }
 
     @Override
     public RelOptCost makeTinyCost()
     {
-      return TINY;
+      return DruidVolcanoCost.TINY;
     }
 
     @Override
     public RelOptCost makeZeroCost()
     {
-      return ZERO;
+      return DruidVolcanoCost.ZERO;
     }
   }
 }
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MaxSqlAggregator.java b/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MaxSqlAggregator.java
index eb8fbd50200..4f29b276a54 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MaxSqlAggregator.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MaxSqlAggregator.java
@@ -71,7 +71,7 @@ public class MaxSqlAggregator extends SimpleSqlAggregator
       default:
         // This error refers to the Druid type. But, we're in SQL validation.
         // It should refer to the SQL type.
-        throw badTypeException(fieldName, "MAX", aggregationType);
+        throw SimpleSqlAggregator.badTypeException(fieldName, "MAX", aggregationType);
     }
   }
 }
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MinSqlAggregator.java b/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MinSqlAggregator.java
index 4d83c64da52..93b87d376b5 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MinSqlAggregator.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/MinSqlAggregator.java
@@ -66,7 +66,7 @@ public class MinSqlAggregator extends SimpleSqlAggregator
       case DOUBLE:
         return new DoubleMinAggregatorFactory(name, fieldName, null, macroTable);
       default:
-        throw badTypeException(fieldName, "MIN", aggregationType);
+        throw SimpleSqlAggregator.badTypeException(fieldName, "MIN", aggregationType);
     }
   }
 }
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/SumSqlAggregator.java b/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/SumSqlAggregator.java
index e7244f46386..29790ab7154 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/SumSqlAggregator.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/aggregation/builtin/SumSqlAggregator.java
@@ -80,7 +80,7 @@ public class SumSqlAggregator extends SimpleSqlAggregator
       case DOUBLE:
         return new DoubleSumAggregatorFactory(name, fieldName, null, macroTable);
       default:
-        throw badTypeException(fieldName, "SUM", aggregationType);
+        throw SimpleSqlAggregator.badTypeException(fieldName, "SUM", aggregationType);
     }
   }
 }
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/expression/DefaultOperandTypeChecker.java b/sql/src/main/java/org/apache/druid/sql/calcite/expression/DefaultOperandTypeChecker.java
index 99a446c270c..a52ce5707c1 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/expression/DefaultOperandTypeChecker.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/expression/DefaultOperandTypeChecker.java
@@ -243,7 +243,7 @@ public class DefaultOperandTypeChecker implements SqlOperandTypeChecker
           operandNames,
           operandTypes,
           computedRequiredOperandCount,
-          buildNullableOperands(computedRequiredOperandCount, operandTypes.size(), notNullOperands),
+          DefaultOperandTypeChecker.buildNullableOperands(computedRequiredOperandCount, operandTypes.size(), notNullOperands),
           literalOperands
       );
     }
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/filtration/ConvertSelectorsToIns.java b/sql/src/main/java/org/apache/druid/sql/calcite/filtration/ConvertSelectorsToIns.java
index 5d58988dda5..413d75fbc6d 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/filtration/ConvertSelectorsToIns.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/filtration/ConvertSelectorsToIns.java
@@ -149,7 +149,7 @@ public class ConvertSelectorsToIns extends BottomUpTransform
     @Override
     protected Pair<SelectorDimFilter, List<DimFilter>> getCollectibleComparison(DimFilter filter)
     {
-      return splitAnd(
+      return ConvertSelectorsToIns.splitAnd(
           filter,
           SelectorDimFilter.class,
 
@@ -217,7 +217,7 @@ public class ConvertSelectorsToIns extends BottomUpTransform
     @Override
     protected Pair<EqualityFilter, List<DimFilter>> getCollectibleComparison(DimFilter filter)
     {
-      return splitAnd(
+      return ConvertSelectorsToIns.splitAnd(
           filter,
           EqualityFilter.class,
 
@@ -275,7 +275,7 @@ public class ConvertSelectorsToIns extends BottomUpTransform
     @Override
     protected Pair<EqualityFilter, List<DimFilter>> getCollectibleComparison(DimFilter filter)
     {
-      return splitAnd(
+      return ConvertSelectorsToIns.splitAnd(
           filter,
           EqualityFilter.class,
 
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/planner/CalciteRulesManager.java b/sql/src/main/java/org/apache/druid/sql/calcite/planner/CalciteRulesManager.java
index 08a5df39d98..f8b5cdabb76 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/planner/CalciteRulesManager.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/planner/CalciteRulesManager.java
@@ -278,7 +278,7 @@ public class CalciteRulesManager
   private Program buildDecoupledLogicalOptimizationProgram(PlannerContext plannerContext)
   {
     final HepProgramBuilder builder = HepProgram.builder();
-    builder.addMatchLimit(HEP_DEFAULT_MATCH_LIMIT);
+    builder.addMatchLimit(CalciteRulesManager.HEP_DEFAULT_MATCH_LIMIT);
     builder.addRuleCollection(baseRuleSet(plannerContext));
     builder.addRuleInstance(CoreRules.UNION_MERGE);
     builder.addRuleInstance(JoinExtractFilterRule.Config.DEFAULT.toRule());
@@ -331,7 +331,7 @@ public class CalciteRulesManager
   private Program buildPreVolcanoManipulationProgram(final PlannerContext plannerContext)
   {
     final HepProgramBuilder builder = HepProgram.builder();
-    builder.addMatchLimit(HEP_DEFAULT_MATCH_LIMIT);
+    builder.addMatchLimit(CalciteRulesManager.HEP_DEFAULT_MATCH_LIMIT);
 
     // Apply FILTER_INTO_JOIN early, if using a join algorithm that requires subqueries anyway.
     if (plannerContext.getJoinAlgorithm().requiresSubquery()) {
@@ -351,7 +351,7 @@ public class CalciteRulesManager
   private Program buildReductionProgram(final PlannerContext plannerContext, final boolean isDruid)
   {
     final HepProgramBuilder builder = HepProgram.builder();
-    builder.addMatchLimit(HEP_DEFAULT_MATCH_LIMIT);
+    builder.addMatchLimit(CalciteRulesManager.HEP_DEFAULT_MATCH_LIMIT);
 
     if (isDruid) {
       // COALESCE rules must run before REDUCTION_RULES, since otherwise ReduceExpressionsRule#pushPredicateIntoCase may
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/planner/Calcites.java b/sql/src/main/java/org/apache/druid/sql/calcite/planner/Calcites.java
index 32e74887bf2..6310b23543d 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/planner/Calcites.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/planner/Calcites.java
@@ -299,7 +299,7 @@ public class Calcites
       case VARCHAR:
         dataType = typeFactory.createTypeWithCharsetAndCollation(
             typeFactory.createSqlType(typeName),
-            defaultCharset(),
+            Calcites.defaultCharset(),
             SqlCollation.IMPLICIT
         );
         break;
@@ -566,7 +566,7 @@ public class Calcites
       if (SqlTypeUtil.isArray(type)) {
         return type;
       }
-      return createSqlArrayTypeWithNullability(
+      return Calcites.createSqlArrayTypeWithNullability(
           opBinding.getTypeFactory(),
           type.getSqlTypeName(),
           true
@@ -583,7 +583,7 @@ public class Calcites
       if (SqlTypeUtil.isArray(type)) {
         return type;
       }
-      return createSqlArrayTypeWithNullability(
+      return Calcites.createSqlArrayTypeWithNullability(
           opBinding.getTypeFactory(),
           type.getSqlTypeName(),
           true
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidOperatorTable.java b/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidOperatorTable.java
index 6d1cd1243e2..0fb1c9fb9ff 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidOperatorTable.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidOperatorTable.java
@@ -558,7 +558,7 @@ public class DruidOperatorTable implements SqlOperatorTable
 
   private static SqlSyntax normalizeSyntax(final SqlSyntax syntax)
   {
-    if (!isFunctionSyntax(syntax)) {
+    if (!DruidOperatorTable.isFunctionSyntax(syntax)) {
       return syntax;
     } else {
       return SqlSyntax.FUNCTION;
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidTypeSystem.java b/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidTypeSystem.java
index 1041269090d..521291c3244 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidTypeSystem.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/planner/DruidTypeSystem.java
@@ -28,7 +28,7 @@ import org.apache.calcite.sql.type.SqlTypeName;
 public class DruidTypeSystem implements RelDataTypeSystem
 {
   public static final DruidTypeSystem INSTANCE = new DruidTypeSystem();
-  public static final RelDataTypeFactory TYPE_FACTORY = new SqlTypeFactoryImpl(INSTANCE);
+  public static final RelDataTypeFactory TYPE_FACTORY = new SqlTypeFactoryImpl(DruidTypeSystem.INSTANCE);
 
   /**
    * Druid uses millisecond precision for timestamps internally. This is also the default at the SQL layer.
@@ -43,7 +43,7 @@ public class DruidTypeSystem implements RelDataTypeSystem
   @Override
   public int getMaxScale(final SqlTypeName typeName)
   {
-    return DEFAULT.getMaxScale(typeName);
+    return RelDataTypeSystem.DEFAULT.getMaxScale(typeName);
   }
 
   @Override
@@ -54,7 +54,7 @@ public class DruidTypeSystem implements RelDataTypeSystem
       case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
         return DEFAULT_TIMESTAMP_PRECISION;
       default:
-        return DEFAULT.getDefaultPrecision(typeName);
+        return RelDataTypeSystem.DEFAULT.getDefaultPrecision(typeName);
     }
   }
 
@@ -64,44 +64,44 @@ public class DruidTypeSystem implements RelDataTypeSystem
     if (typeName == SqlTypeName.TIME || typeName == SqlTypeName.TIMESTAMP) {
       return DEFAULT_TIMESTAMP_PRECISION;
     } else {
-      return DEFAULT.getMaxPrecision(typeName);
+      return RelDataTypeSystem.DEFAULT.getMaxPrecision(typeName);
     }
   }
 
   @Override
   public int getMaxNumericScale()
   {
-    return DEFAULT.getMaxNumericScale();
+    return RelDataTypeSystem.DEFAULT.getMaxNumericScale();
   }
 
   @Override
   public int getMaxNumericPrecision()
   {
-    return DEFAULT.getMaxNumericPrecision();
+    return RelDataTypeSystem.DEFAULT.getMaxNumericPrecision();
   }
 
   @Override
   public String getLiteral(final SqlTypeName typeName, final boolean isPrefix)
   {
-    return DEFAULT.getLiteral(typeName, isPrefix);
+    return RelDataTypeSystem.DEFAULT.getLiteral(typeName, isPrefix);
   }
 
   @Override
   public boolean isCaseSensitive(final SqlTypeName typeName)
   {
-    return DEFAULT.isCaseSensitive(typeName);
+    return RelDataTypeSystem.DEFAULT.isCaseSensitive(typeName);
   }
 
   @Override
   public boolean isAutoincrement(final SqlTypeName typeName)
   {
-    return DEFAULT.isAutoincrement(typeName);
+    return RelDataTypeSystem.DEFAULT.isAutoincrement(typeName);
   }
 
   @Override
   public int getNumTypeRadix(final SqlTypeName typeName)
   {
-    return DEFAULT.getNumTypeRadix(typeName);
+    return RelDataTypeSystem.DEFAULT.getNumTypeRadix(typeName);
   }
 
   @Override
@@ -132,25 +132,25 @@ public class DruidTypeSystem implements RelDataTypeSystem
       final RelDataType arg1Type
   )
   {
-    return DEFAULT.deriveCovarType(typeFactory, arg0Type, arg1Type);
+    return RelDataTypeSystem.DEFAULT.deriveCovarType(typeFactory, arg0Type, arg1Type);
   }
 
   @Override
   public RelDataType deriveFractionalRankType(final RelDataTypeFactory typeFactory)
   {
-    return DEFAULT.deriveFractionalRankType(typeFactory);
+    return RelDataTypeSystem.DEFAULT.deriveFractionalRankType(typeFactory);
   }
 
   @Override
   public RelDataType deriveRankType(final RelDataTypeFactory typeFactory)
   {
-    return DEFAULT.deriveRankType(typeFactory);
+    return RelDataTypeSystem.DEFAULT.deriveRankType(typeFactory);
   }
 
   @Override
   public boolean isSchemaCaseSensitive()
   {
-    return DEFAULT.isSchemaCaseSensitive();
+    return RelDataTypeSystem.DEFAULT.isSchemaCaseSensitive();
   }
 
   @Override
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/planner/PlannerConfig.java b/sql/src/main/java/org/apache/druid/sql/calcite/planner/PlannerConfig.java
index dbc2be0b091..589d68d4305 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/planner/PlannerConfig.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/planner/PlannerConfig.java
@@ -430,7 +430,7 @@ public class PlannerConfig
       );
     }
 
-    PlannerConfig newConfig = builder().withOverrides(overrides).build();
+    PlannerConfig newConfig = PlannerConfig.builder().withOverrides(overrides).build();
     if (!equals(newConfig)) {
       throw DruidException.defensive(
           "Not all PlannerConfig options are not persistable as QueryContext keys!\nold: %s\nnew: %s",
diff --git a/sql/src/main/java/org/apache/druid/sql/calcite/rel/Grouping.java b/sql/src/main/java/org/apache/druid/sql/calcite/rel/Grouping.java
index dbdc79883da..8bcf1544fc8 100644
--- a/sql/src/main/java/org/apache/druid/sql/calcite/rel/Grouping.java
+++ b/sql/src/main/java/org/apache/druid/sql/calcite/rel/Grouping.java
@@ -265,7 +265,7 @@ public class Grouping
       newSubtotals = subtotals;
     }
 
-    return create(
+    return Grouping.create(
         newDimensions,
         newSubtotals,
         newAggregations,
diff --git a/sql/src/main/java/org/apache/druid/sql/http/ObjectWriter.java b/sql/src/main/java/org/apache/druid/sql/http/ObjectWriter.java
index d4dbd674d86..27a027d0abd 100644
--- a/sql/src/main/java/org/apache/druid/sql/http/ObjectWriter.java
+++ b/sql/src/main/java/org/apache/druid/sql/http/ObjectWriter.java
@@ -126,14 +126,14 @@ public class ObjectWriter implements ResultFormat.Writer
 
         if (includeTypes) {
           jsonGenerator.writeStringField(
-              TYPE_HEADER_NAME,
+              ObjectWriter.TYPE_HEADER_NAME,
               signature.getColumnType(i).map(TypeSignature::asTypeString).orElse(null)
           );
         }
 
         if (includeSqlTypes) {
           jsonGenerator.writeStringField(
-              SQL_TYPE_HEADER_NAME,
+              ObjectWriter.SQL_TYPE_HEADER_NAME,
               rowType.getFieldList().get(i).getType().getSqlTypeName().getName()
           );
         }
@@ -162,7 +162,7 @@ public class ObjectWriter implements ResultFormat.Writer
         jsonGenerator.writeStartObject();
 
         jsonGenerator.writeStringField(
-            TYPE_HEADER_NAME,
+            ObjectWriter.TYPE_HEADER_NAME,
             signature.getColumnType(i).map(TypeSignature::asTypeString).orElse(null)
         );
 
diff --git a/sql/src/main/java/org/apache/druid/sql/http/SqlResource.java b/sql/src/main/java/org/apache/druid/sql/http/SqlResource.java
index 9af6e15e035..d957e7155b5 100644
--- a/sql/src/main/java/org/apache/druid/sql/http/SqlResource.java
+++ b/sql/src/main/java/org/apache/druid/sql/http/SqlResource.java
@@ -211,7 +211,7 @@ public class SqlResource
           jsonMapper,
           responseContextConfig,
           selfNode,
-          QUERY_METRIC_COUNTER,
+          SqlResource.QUERY_METRIC_COUNTER,
           sqlQueryId,
           MediaType.APPLICATION_JSON_TYPE,
           headers


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