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The following commit(s) were added to refs/heads/master by this push:
     new 0c880dceb7 Minor cleanups in rebalance related code (#15806)
0c880dceb7 is described below

commit 0c880dceb7fcf4cc5268b7ced19d54ef9f03c36f
Author: Yash Mayya <yash.ma...@gmail.com>
AuthorDate: Thu May 15 16:44:10 2025 +0100

    Minor cleanups in rebalance related code (#15806)
---
 .../core/rebalance/RebalanceJobConstants.java      |   4 +-
 .../core/rebalance/TableRebalanceObserver.java     |   4 +-
 .../helix/core/rebalance/TableRebalancer.java      |  58 +++++------
 .../rebalance/ZkBasedTableRebalanceObserver.java   |  10 +-
 .../helix/core/relocation/SegmentRelocator.java    |  13 ++-
 .../helix/core/rebalance/TableRebalancerTest.java  | 114 ++++++++++++---------
 .../TestZkBasedTableRebalanceObserver.java         |  18 ++--
 7 files changed, 116 insertions(+), 105 deletions(-)

diff --git 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/RebalanceJobConstants.java
 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/RebalanceJobConstants.java
index 68314bbba2..41e7ccecf4 100644
--- 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/RebalanceJobConstants.java
+++ 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/RebalanceJobConstants.java
@@ -22,8 +22,8 @@ public class RebalanceJobConstants {
   private RebalanceJobConstants() {
   }
 
-  // Progress status of the rebalance operartion
+  // Progress status of the rebalance operation
   public static final String JOB_METADATA_KEY_REBALANCE_PROGRESS_STATS = 
"REBALANCE_PROGRESS_STATS";
-  // Configs to retry the rebalance operartion
+  // Configs to retry the rebalance operation
   public static final String JOB_METADATA_KEY_REBALANCE_CONTEXT = 
"REBALANCE_CONTEXT";
 }
diff --git 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalanceObserver.java
 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalanceObserver.java
index 68abcbad72..0579b2022b 100644
--- 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalanceObserver.java
+++ 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalanceObserver.java
@@ -25,7 +25,7 @@ import javax.annotation.Nullable;
 
 /**
  * The <code>TableRebalanceObserver</code> interface provides callbacks to 
take actions
- * during critical triggers. The 3 main triggers during a rebalance operation 
are show below.
+ * during critical triggers. The 4 main triggers during a rebalance operation 
are shown below.
  * For example, we can track stats + status of rebalance during these triggers.
  */
 public interface TableRebalanceObserver {
@@ -37,7 +37,7 @@ public interface TableRebalanceObserver {
     // Ideal state changes due to external events and new target for rebalance 
is computed
     IDEAL_STATE_CHANGE_TRIGGER,
     // Next assignment calculation change trigger which calculates next 
assignment to act on
-    NEXT_ASSINGMENT_CALCULATION_TRIGGER,
+    NEXT_ASSIGNMENT_CALCULATION_TRIGGER,
   }
 
   void onTrigger(Trigger trigger, Map<String, Map<String, String>> 
currentState,
diff --git 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancer.java
 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancer.java
index 1ca1bc266c..eb3f12d13d 100644
--- 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancer.java
+++ 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancer.java
@@ -606,7 +606,7 @@ public class TableRebalancer {
           
SegmentAssignmentUtils.getNumSegmentsToMovePerInstance(currentAssignment, 
nextAssignment));
 
       // Record change of current ideal state and the next assignment
-      
_tableRebalanceObserver.onTrigger(TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER,
+      
_tableRebalanceObserver.onTrigger(TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER,
           currentAssignment, nextAssignment, rebalanceContext);
       if (_tableRebalanceObserver.isStopped()) {
         return new RebalanceResult(rebalanceJobId, 
_tableRebalanceObserver.getStopStatus(),
@@ -906,7 +906,7 @@ public class TableRebalancer {
     Map<String, Integer> consumingSegmentsOffsetsToCatchUp =
         getConsumingSegmentsOffsetsToCatchUp(tableConfig, 
consumingSegmentZKmetadata, tableRebalanceLogger);
     Map<String, Integer> consumingSegmentsAge =
-        getConsumingSegmentsAge(tableNameWithType, consumingSegmentZKmetadata, 
tableRebalanceLogger);
+        getConsumingSegmentsAge(consumingSegmentZKmetadata, 
tableRebalanceLogger);
 
     Map<String, Integer> consumingSegmentsOffsetsToCatchUpTopN;
     Map<String, 
RebalanceSummaryResult.ConsumingSegmentToBeMovedSummary.ConsumingSegmentSummaryPerServer>
@@ -958,8 +958,8 @@ public class TableRebalancer {
    * segment name to the age of that consuming segment. Return null if failed 
to obtain info for any consuming segment.
    */
   @Nullable
-  private Map<String, Integer> getConsumingSegmentsAge(String 
tableNameWithType,
-      Map<String, SegmentZKMetadata> consumingSegmentZKMetadata, Logger 
tableRebalanceLogger) {
+  private Map<String, Integer> getConsumingSegmentsAge(Map<String, 
SegmentZKMetadata> consumingSegmentZKMetadata,
+      Logger tableRebalanceLogger) {
     Map<String, Integer> consumingSegmentsAge = new HashMap<>();
     long now = System.currentTimeMillis();
     try {
@@ -1344,18 +1344,17 @@ public class TableRebalancer {
                 String.format("Rebalance has already stopped with status: %s",
                     _tableRebalanceObserver.getStopStatus()));
           }
-          if (isExternalViewConverged(tableNameWithType, 
externalView.getRecord().getMapFields(),
-              idealState.getRecord().getMapFields(), lowDiskMode, bestEfforts, 
segmentsToMonitor,
-              tableRebalanceLogger)) {
+          if (isExternalViewConverged(externalView.getRecord().getMapFields(), 
idealState.getRecord().getMapFields(),
+              lowDiskMode, bestEfforts, segmentsToMonitor, 
tableRebalanceLogger)) {
             tableRebalanceLogger.info("ExternalView converged in {}ms, with {} 
extensions",
                 System.currentTimeMillis() - startTimeMs, extensionCount);
             return idealState;
           }
           if (previousRemainingSegments < 0) {
             // initialize previousRemainingSegments
-            previousRemainingSegments = 
getNumRemainingSegmentReplicasToProcess(tableNameWithType,
-                externalView.getRecord().getMapFields(), 
idealState.getRecord().getMapFields(), lowDiskMode,
-                bestEfforts, segmentsToMonitor, tableRebalanceLogger, false);
+            previousRemainingSegments = 
getNumRemainingSegmentReplicasToProcess(externalView.getRecord().getMapFields(),
+                idealState.getRecord().getMapFields(), lowDiskMode, 
bestEfforts, segmentsToMonitor,
+                tableRebalanceLogger, false);
             tableRebalanceLogger.info("Remaining {} segment replicas to be 
processed.", previousRemainingSegments);
           }
         }
@@ -1371,9 +1370,9 @@ public class TableRebalancer {
                 externalViewStabilizationTimeoutInMs));
       }
 
-      int currentRemainingSegments = 
getNumRemainingSegmentReplicasToProcess(tableNameWithType,
-          externalView.getRecord().getMapFields(), 
idealState.getRecord().getMapFields(), lowDiskMode, bestEfforts,
-          segmentsToMonitor, tableRebalanceLogger, false);
+      int currentRemainingSegments = 
getNumRemainingSegmentReplicasToProcess(externalView.getRecord().getMapFields(),
+          idealState.getRecord().getMapFields(), lowDiskMode, bestEfforts, 
segmentsToMonitor, tableRebalanceLogger,
+          false);
 
       // It is possible that remainingSegments increases so that 
currentRemainingSegments > previousRemainingSegments,
       // likely due to CONSUMING segments committing, where the state of the 
segment change to ONLINE. Therefore, if
@@ -1403,41 +1402,37 @@ public class TableRebalancer {
   }
 
   @VisibleForTesting
-  static boolean isExternalViewConverged(String tableNameWithType,
-      Map<String, Map<String, String>> externalViewSegmentStates,
+  static boolean isExternalViewConverged(Map<String, Map<String, String>> 
externalViewSegmentStates,
       Map<String, Map<String, String>> idealStateSegmentStates, boolean 
lowDiskMode, boolean bestEfforts,
       @Nullable Set<String> segmentsToMonitor) {
-    return
-        getNumRemainingSegmentReplicasToProcess(tableNameWithType, 
externalViewSegmentStates, idealStateSegmentStates,
-            lowDiskMode, bestEfforts, segmentsToMonitor, LOGGER, true) == 0;
+    return getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+        bestEfforts, segmentsToMonitor, LOGGER, true) == 0;
   }
 
   /**
    * Check if the external view has converged to the ideal state. See 
`getNumRemainingSegmentReplicasToProcess` for
    * details on how the convergence is determined.
    */
-  private static boolean isExternalViewConverged(String tableNameWithType,
-      Map<String, Map<String, String>> externalViewSegmentStates,
+  private static boolean isExternalViewConverged(Map<String, Map<String, 
String>> externalViewSegmentStates,
       Map<String, Map<String, String>> idealStateSegmentStates, boolean 
lowDiskMode, boolean bestEfforts,
       @Nullable Set<String> segmentsToMonitor, Logger tableRebalanceLogger) {
-    return
-        getNumRemainingSegmentReplicasToProcess(tableNameWithType, 
externalViewSegmentStates, idealStateSegmentStates,
-            lowDiskMode, bestEfforts, segmentsToMonitor, tableRebalanceLogger, 
true) == 0;
+    return getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+        bestEfforts, segmentsToMonitor, tableRebalanceLogger, true) == 0;
   }
 
   @VisibleForTesting
-  static int getNumRemainingSegmentReplicasToProcess(String tableNameWithType,
-      Map<String, Map<String, String>> externalViewSegmentStates,
+  static int getNumRemainingSegmentReplicasToProcess(Map<String, Map<String, 
String>> externalViewSegmentStates,
       Map<String, Map<String, String>> idealStateSegmentStates, boolean 
lowDiskMode, boolean bestEfforts,
       @Nullable Set<String> segmentsToMonitor) {
-    return getNumRemainingSegmentReplicasToProcess(tableNameWithType, 
externalViewSegmentStates,
-        idealStateSegmentStates, lowDiskMode, bestEfforts, segmentsToMonitor, 
LOGGER, false);
+    return getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+        bestEfforts, segmentsToMonitor, LOGGER, false);
   }
 
   /**
    * If `earlyReturn=false`, it returns the number of segment replicas that 
are not in the expected state.
    * If `earlyReturn=true` it returns 1 if the number of said segment replicas 
are more than 0, returns 0 otherwise,
    * which is used to check whether the ExternalView has converged to the 
IdealState.
+   * <p>
    * The method checks the following:
    * Only the segments in the IdealState and being monitored. Extra segments 
in ExternalView are ignored
    * because they are not managed by the rebalancer.
@@ -1449,15 +1444,16 @@ public class TableRebalancer {
    * <li> The instance appears in IS instance map is not in the EV instance 
map, unless the IS instance state is OFFLINE
    * <li> The instance has different states between IS and EV instance map, 
unless the IS instance state is OFFLINE
    * </ul>
+   * <p>
    * If `lowDiskMode=true`, go through the instance map from ExternalView and 
compare it with the one in IdealState,
-   * and also increment the number of remaining segment replicas to process if:
-   * - The instance appears in EV instance map does not appear in the IS 
instance map
+   * and also increment the number of remaining segment replicas to process if 
the instance appears in EV instance map
+   * does not appear in the IS instance map.
+   * <p>
    * Once there's an ERROR state for any instance in ExternalView, throw an 
exception to abort the rebalance because
    * we are not able to get out of the ERROR state, unless `bestEfforts=true`, 
in which case, log a warning and keep
    * going as if that instance has converged.
    */
-  private static int getNumRemainingSegmentReplicasToProcess(String 
tableNameWithType,
-      Map<String, Map<String, String>> externalViewSegmentStates,
+  private static int getNumRemainingSegmentReplicasToProcess(Map<String, 
Map<String, String>> externalViewSegmentStates,
       Map<String, Map<String, String>> idealStateSegmentStates, boolean 
lowDiskMode, boolean bestEfforts,
       @Nullable Set<String> segmentsToMonitor, Logger tableRebalanceLogger, 
boolean earlyReturn) {
     int remainingSegmentReplicasToProcess = 0;
diff --git 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/ZkBasedTableRebalanceObserver.java
 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/ZkBasedTableRebalanceObserver.java
index 37da8bd9ec..042be1a93d 100644
--- 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/ZkBasedTableRebalanceObserver.java
+++ 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/ZkBasedTableRebalanceObserver.java
@@ -46,7 +46,7 @@ public class ZkBasedTableRebalanceObserver implements 
TableRebalanceObserver {
   private final PinotHelixResourceManager _pinotHelixResourceManager;
   private final TableRebalanceProgressStats _tableRebalanceProgressStats;
   private final TableRebalanceContext _tableRebalanceContext;
-  // These previous stats are used for rollback scenarios where the IdealState 
update fails dure to a version
+  // These previous stats are used for rollback scenarios where the IdealState 
update fails due to a version
   // change and the rebalance loop is retried.
   private TableRebalanceProgressStats.RebalanceProgressStats 
_previousStepStats;
   private TableRebalanceProgressStats.RebalanceProgressStats 
_previousOverallStats;
@@ -136,13 +136,13 @@ public class ZkBasedTableRebalanceObserver implements 
TableRebalanceObserver {
           updatedStatsInZk = true;
         }
         break;
-      case NEXT_ASSINGMENT_CALCULATION_TRIGGER:
+      case NEXT_ASSIGNMENT_CALCULATION_TRIGGER:
         // Update the previous stats with the current values in case a 
rollback is needed due to IdealState version
         // change
         _previousStepStats = new 
TableRebalanceProgressStats.RebalanceProgressStats(
             
_tableRebalanceProgressStats.getRebalanceProgressStatsCurrentStep());
         latestProgress = calculateUpdatedProgressStats(targetState, 
currentState, rebalanceContext,
-            Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER, 
_tableRebalanceProgressStats);
+            Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER, 
_tableRebalanceProgressStats);
         if 
(!_tableRebalanceProgressStats.getRebalanceProgressStatsCurrentStep().equals(latestProgress))
 {
           
_tableRebalanceProgressStats.setRebalanceProgressStatsCurrentStep(latestProgress);
           trackStatsInZk();
@@ -524,7 +524,7 @@ public class ZkBasedTableRebalanceObserver implements 
TableRebalanceObserver {
         new TableRebalanceProgressStats.RebalanceProgressStats();
     switch (trigger) {
       case START_TRIGGER:
-      case NEXT_ASSINGMENT_CALCULATION_TRIGGER:
+      case NEXT_ASSIGNMENT_CALCULATION_TRIGGER:
         // These are initialization steps for global / step progress stats
         progressStats._totalSegmentsToBeAdded = totalSegmentsToBeAdded;
         progressStats._totalSegmentsToBeDeleted = totalSegmentsToBeDeleted;
@@ -542,7 +542,7 @@ public class ZkBasedTableRebalanceObserver implements 
TableRebalanceObserver {
         progressStats._totalEstimatedDataToBeMovedInBytes =
             
TableRebalanceProgressStats.calculateNewEstimatedDataToBeMovedInBytes(0,
                 rebalanceContext.getEstimatedAverageSegmentSizeInBytes(), 
totalSegmentsToBeAdded);
-        progressStats._startTimeMs = trigger == 
Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER
+        progressStats._startTimeMs = trigger == 
Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER
             ? System.currentTimeMillis() : 
rebalanceProgressStats.getStartTimeMs();
         break;
       case IDEAL_STATE_CHANGE_TRIGGER:
diff --git 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/relocation/SegmentRelocator.java
 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/relocation/SegmentRelocator.java
index 1981ecaca9..17dd44378b 100644
--- 
a/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/relocation/SegmentRelocator.java
+++ 
b/pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/relocation/SegmentRelocator.java
@@ -55,9 +55,11 @@ import org.slf4j.LoggerFactory;
 
 
 /**
- * Periodic task to run rebalancer in background to
- * 1. relocate COMPLETED segments to tag overrides
- * 2. relocate ONLINE segments to tiers if tier configs are set
+ * Periodic task to run rebalancer in background to:
+ * <ol>
+ * <li> Relocate COMPLETED segments to tag overrides
+ * <li> Relocate ONLINE segments to tiers if tier configs are set
+ * </ol>
  * Allow at most one replica unavailable during rebalance. Not applicable for 
HLC tables.
  */
 public class SegmentRelocator extends ControllerPeriodicTask<Void> {
@@ -82,7 +84,8 @@ public class SegmentRelocator extends 
ControllerPeriodicTask<Void> {
 
   private final Set<String> _waitingTables;
   private final BlockingQueue<String> _waitingQueue;
-  @Nullable private final Set<String> _tablesUndergoingRebalance;
+  @Nullable
+  private final Set<String> _tablesUndergoingRebalance;
 
   public SegmentRelocator(PinotHelixResourceManager pinotHelixResourceManager,
       LeadControllerManager leadControllerManager, ControllerConf config, 
ControllerMetrics controllerMetrics,
@@ -294,7 +297,7 @@ public class SegmentRelocator extends 
ControllerPeriodicTask<Void> {
         }
       }
     }
-    if (serverToSegmentsToMigrate.size() > 0) {
+    if (!serverToSegmentsToMigrate.isEmpty()) {
       LOGGER.info("Notify servers: {} to move segments to new tiers locally", 
serverToSegmentsToMigrate.keySet());
       reloadSegmentsForLocalTierMigration(tableNameWithType, 
serverToSegmentsToMigrate, messagingService);
     } else {
diff --git 
a/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerTest.java
 
b/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerTest.java
index 1424c774b7..2af9d10fb9 100644
--- 
a/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerTest.java
+++ 
b/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerTest.java
@@ -1292,8 +1292,9 @@ public class TableRebalancerTest {
     // Empty segment states should match
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertTrue(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
       }
     }
 
@@ -1303,8 +1304,9 @@ public class TableRebalancerTest {
     externalViewSegmentStates.put("segment1", instanceStateMap);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertTrue(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
       }
     }
 
@@ -1314,8 +1316,9 @@ public class TableRebalancerTest {
     idealStateSegmentStates.put("segment2", instanceStateMap);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertTrue(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
       }
     }
 
@@ -1323,22 +1326,24 @@ public class TableRebalancerTest {
     instanceStateMap.put("instance2", CONSUMING);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertFalse(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 1);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 1);
       }
     }
 
     instanceStateMap.put("instance3", CONSUMING);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertFalse(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 2);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 2);
       }
     }
 
@@ -1347,11 +1352,12 @@ public class TableRebalancerTest {
     externalViewSegmentStates.put("segment2", instanceStateMap);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertFalse(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 2);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 2);
       }
     }
 
@@ -1359,11 +1365,12 @@ public class TableRebalancerTest {
     instanceStateMap.put("instance2", OFFLINE);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertFalse(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 2);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 2);
       }
     }
 
@@ -1372,11 +1379,12 @@ public class TableRebalancerTest {
     instanceStateMap.put("instance3", OFFLINE);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertFalse(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 2);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 2);
       }
     }
 
@@ -1385,11 +1393,12 @@ public class TableRebalancerTest {
     instanceStateMap.put("instance3", OFFLINE);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertFalse(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 1);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 1);
       }
     }
 
@@ -1398,11 +1407,12 @@ public class TableRebalancerTest {
     instanceStateMap.put("instance3", CONSUMING);
     for (boolean lowDiskMode : falseAndTrue) {
       for (boolean bestEfforts : falseAndTrue) {
-        assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-            idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+        assertTrue(
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                bestEfforts, null));
         assertEquals(
-            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, lowDiskMode, bestEfforts, null), 0);
+            
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+                lowDiskMode, bestEfforts, null), 0);
       }
     }
 
@@ -1411,16 +1421,17 @@ public class TableRebalancerTest {
     instanceStateMap.put("instance5", CONSUMING);
     instanceStateMap.put("instance6", CONSUMING);
     for (boolean bestEfforts : falseAndTrue) {
-      assertTrue(
-          TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates, idealStateSegmentStates,
-              false, bestEfforts, null));
-      
assertEquals(TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName,
 externalViewSegmentStates,
-          idealStateSegmentStates, false, bestEfforts, null), 0);
+      
assertTrue(TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, false,
+          bestEfforts, null));
+      assertEquals(
+          
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+              false, bestEfforts, null), 0);
       assertFalse(
-          TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates, idealStateSegmentStates,
-              true, bestEfforts, null));
-      
assertEquals(TableRebalancer.getNumRemainingSegmentReplicasToProcess(offlineTableName,
 externalViewSegmentStates,
-          idealStateSegmentStates, true, bestEfforts, null), 3);
+          TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, true, bestEfforts,
+              null));
+      assertEquals(
+          
TableRebalancer.getNumRemainingSegmentReplicasToProcess(externalViewSegmentStates,
 idealStateSegmentStates,
+              true, bestEfforts, null), 3);
     }
 
     // When instance state is ERROR in ExternalView, should fail in regular 
mode but pass in best-efforts mode
@@ -1430,15 +1441,15 @@ public class TableRebalancerTest {
     instanceStateMap.remove("instance6");
     for (boolean lowDiskMode : falseAndTrue) {
       try {
-        TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates, idealStateSegmentStates,
-            lowDiskMode, false, null);
+        TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode, false,
+            null);
         fail();
       } catch (Exception e) {
         // Expected
       }
       assertTrue(
-          TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates, idealStateSegmentStates,
-              lowDiskMode, true, null));
+          TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode, true,
+              null));
     }
 
     // When the extra instance is in ERROR state, should throw exception in 
low disk mode when best-efforts is disabled
@@ -1451,15 +1462,16 @@ public class TableRebalancerTest {
       for (boolean bestEfforts : falseAndTrue) {
         if (lowDiskMode && !bestEfforts) {
           try {
-            TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-                idealStateSegmentStates, true, false, null);
+            TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, true, false,
+                null);
             fail();
           } catch (Exception e) {
             // Expected
           }
         } else {
-          assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName, 
externalViewSegmentStates,
-              idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+          assertTrue(
+              
TableRebalancer.isExternalViewConverged(externalViewSegmentStates, 
idealStateSegmentStates, lowDiskMode,
+                  bestEfforts, null));
         }
       }
     }
diff --git 
a/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TestZkBasedTableRebalanceObserver.java
 
b/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TestZkBasedTableRebalanceObserver.java
index 043269f037..b0d86702e9 100644
--- 
a/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TestZkBasedTableRebalanceObserver.java
+++ 
b/pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TestZkBasedTableRebalanceObserver.java
@@ -113,7 +113,7 @@ public class TestZkBasedTableRebalanceObserver {
     assertEquals(currentStepStats._totalCarryOverSegmentsToBeDeleted, 0);
     checkProgressPercentMetrics(controllerMetrics, observer);
     // This simulates the first step of rebalance, where the IS is set to the 
intermediate assignment
-    
observer.onTrigger(TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER,
 source, targetIntermediate,
+    
observer.onTrigger(TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER,
 source, targetIntermediate,
         rebalanceContext);
     overallStats = 
observer.getTableRebalanceProgressStats().getRebalanceProgressStatsOverall();
     currentStepStats = 
observer.getTableRebalanceProgressStats().getRebalanceProgressStatsCurrentStep();
@@ -167,7 +167,7 @@ public class TestZkBasedTableRebalanceObserver {
     assertEquals(currentStepStats._totalCarryOverSegmentsToBeDeleted, 0);
     checkProgressPercentMetrics(controllerMetrics, observer);
     // Next assignment calculated based on the IS, IS should be same as the 
previous targetAssignment
-    
observer.onTrigger(TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER,
 targetIntermediate, target,
+    
observer.onTrigger(TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER,
 targetIntermediate, target,
         rebalanceContext);
     overallStats = 
observer.getTableRebalanceProgressStats().getRebalanceProgressStatsOverall();
     currentStepStats = 
observer.getTableRebalanceProgressStats().getRebalanceProgressStatsCurrentStep();
@@ -314,7 +314,7 @@ public class TestZkBasedTableRebalanceObserver {
 
     // Triggers to initialize the overall or step level progress stats - they 
should provide similar results
     List<TableRebalanceObserver.Trigger> triggers = 
Arrays.asList(TableRebalanceObserver.Trigger.START_TRIGGER,
-        TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER);
+        TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER);
     for (TableRebalanceObserver.Trigger trigger : triggers) {
       Map<String, Map<String, String>> current = new TreeMap<>();
       current.put("segment1", 
SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1"), ONLINE));
@@ -586,7 +586,7 @@ public class TestZkBasedTableRebalanceObserver {
     nextAssignment.put("segment2", 
SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2", "host3"), 
ONLINE));
 
     stats = 
ZkBasedTableRebalanceObserver.calculateUpdatedProgressStats(nextAssignment, 
current, rebalanceContextIS,
-        TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
+        TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
     assertEquals(stats._totalSegmentsToBeAdded, 2);
     assertEquals(stats._totalSegmentsToBeDeleted, 0);
     assertEquals(stats._totalRemainingSegmentsToBeAdded, 2);
@@ -753,7 +753,7 @@ public class TestZkBasedTableRebalanceObserver {
         Arrays.asList("host2", "host3", "host4", "host5"), ONLINE));
 
     stats = 
ZkBasedTableRebalanceObserver.calculateUpdatedProgressStats(nextAssignment, 
current, rebalanceContextIS,
-        TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
+        TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
     assertEquals(stats._totalSegmentsToBeAdded, 4);
     assertEquals(stats._totalSegmentsToBeDeleted, 0);
     assertEquals(stats._totalRemainingSegmentsToBeAdded, 4);
@@ -885,7 +885,7 @@ public class TestZkBasedTableRebalanceObserver {
         Arrays.asList("host2", "host3", "host4", "host5"), ONLINE));
 
     stats = 
ZkBasedTableRebalanceObserver.calculateUpdatedProgressStats(nextAssignment, 
current, rebalanceContextIS,
-        TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
+        TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
     assertEquals(stats._totalSegmentsToBeAdded, 2);
     assertEquals(stats._totalSegmentsToBeDeleted, 2);
     assertEquals(stats._totalRemainingSegmentsToBeAdded, 2);
@@ -1098,7 +1098,7 @@ public class TestZkBasedTableRebalanceObserver {
     nextAssignment.put("segment2", 
SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2", "host3"), 
ONLINE));
 
     stats = 
ZkBasedTableRebalanceObserver.calculateUpdatedProgressStats(nextAssignment, 
current, rebalanceContextIS,
-        TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
+        TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
     assertEquals(stats._totalSegmentsToBeAdded, 2);
     assertEquals(stats._totalSegmentsToBeDeleted, 0);
     assertEquals(stats._totalRemainingSegmentsToBeAdded, 2);
@@ -1192,7 +1192,7 @@ public class TestZkBasedTableRebalanceObserver {
         Arrays.asList("host2", "host3", "host4", "host5"), ONLINE));
 
     stats = 
ZkBasedTableRebalanceObserver.calculateUpdatedProgressStats(nextAssignment, 
oldNextAssignment,
-        rebalanceContextIS, 
TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER,
+        rebalanceContextIS, 
TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER,
         tableRebalanceProgressStats);
     assertEquals(stats._totalSegmentsToBeAdded, 4);
     assertEquals(stats._totalSegmentsToBeDeleted, 0);
@@ -1366,7 +1366,7 @@ public class TestZkBasedTableRebalanceObserver {
         Arrays.asList("host2", "host3", "host4", "host5"), ONLINE));
 
     stats = 
ZkBasedTableRebalanceObserver.calculateUpdatedProgressStats(nextAssignment, 
current, rebalanceContextIS,
-        TableRebalanceObserver.Trigger.NEXT_ASSINGMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
+        TableRebalanceObserver.Trigger.NEXT_ASSIGNMENT_CALCULATION_TRIGGER, 
tableRebalanceProgressStats);
     assertEquals(stats._totalSegmentsToBeAdded, 2);
     assertEquals(stats._totalSegmentsToBeDeleted, 2);
     assertEquals(stats._totalRemainingSegmentsToBeAdded, 2);


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