jackjlli commented on a change in pull request #7886:
URL: https://github.com/apache/pinot/pull/7886#discussion_r768256238



##########
File path: 
pinot-core/src/main/java/org/apache/pinot/core/data/manager/realtime/RealtimeTableDataManager.java
##########
@@ -340,9 +340,18 @@ public void addSegment(String segmentName, TableConfig 
tableConfig, IndexLoading
       PartitionUpsertMetadataManager partitionUpsertMetadataManager =
           _tableUpsertMetadataManager != null ? _tableUpsertMetadataManager
               .getOrCreatePartitionManager(partitionGroupId) : null;
-      segmentDataManager =
-          new LLRealtimeSegmentDataManager(segmentZKMetadata, tableConfig, 
this, _indexDir.getAbsolutePath(),
-              indexLoadingConfig, schema, llcSegmentName, semaphore, 
_serverMetrics, partitionUpsertMetadataManager);
+      try {
+        segmentDataManager =
+            new LLRealtimeSegmentDataManager(segmentZKMetadata, tableConfig, 
this, _indexDir.getAbsolutePath(),
+                indexLoadingConfig, schema, llcSegmentName, semaphore, 
_serverMetrics, partitionUpsertMetadataManager);
+      } catch (Exception e) {
+        // In case of exception thrown here, segment goes to ERROR state. Then 
any attempt to reset the segment from
+        // ERROR -> OFFLINE -> CONSUMING via Helix Admin fails because the 
semaphore never gets released and the
+        // semaphore.acquire() is called in constructor of 
LLRealtimeSegmentDataManager. Hence releasing the semaphore
+        // here to unblock reset operation via Helix Admin.
+        semaphore.release();
+        throw e;

Review comment:
       +1 on wrapping the actual logic to another method to keep things simple.




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