noob-se7en commented on code in PR #15261:
URL: https://github.com/apache/pinot/pull/15261#discussion_r2009563467


##########
pinot-core/src/main/java/org/apache/pinot/core/data/manager/realtime/RealtimeTableDataManager.java:
##########
@@ -885,4 +921,21 @@ private void validate(TableConfig tableConfig, Schema 
schema) {
     // 2. Validate the schema itself
     SchemaUtils.validate(schema);
   }
+
+  private SemaphoreAccessCoordinator getSemaphoreAccessCoordinator(int 
partitionGroupId) {
+    return 
_partitionGroupIdToSemaphoreCoordinatorMap.computeIfAbsent(partitionGroupId,
+        k -> new SemaphoreAccessCoordinator(new Semaphore(1), 
_enforceConsumptionInOrder, this));

Review Comment:
   With lock, Other thread might not be able to unlock the lock acquired by 
consumer thread.



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