mcvsubbu commented on a change in pull request #6483:
URL: https://github.com/apache/incubator-pinot/pull/6483#discussion_r564165441



##########
File path: 
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/realtime/PinotLLCRealtimeSegmentManager.java
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@@ -793,6 +793,27 @@ void 
updateInstanceStatesForNewConsumingSegment(Map<String, Map<String, String>>
       LOGGER.info("Updating segment: {} to ONLINE state", 
committingSegmentName);
     }
 
+    // There used to be a race condition in pinot (caused by heavy GC on the 
controller during segment commit)

Review comment:
       In any case, it picks up the latest Idealstate and checks on that znode. 
If a different controller added a segment, then even if the old controller gets 
back control, it will not be able to add the new segment




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