smjn commented on PR #18521:
URL: https://github.com/apache/kafka/pull/18521#issuecomment-2590573714

   > It seems to me that `testMultipleConsumersInGroupSequentialConsumption` is 
flaky with this PR.
   
   It appears that occasionally this error is happening
   ```
   [2025-01-14 22:23:21,456] ERROR [group-coordinator-event-processor-0]: 
Failed to run event CoordinatorWriteEvent(name=share-group-heartbeat) due to: 
Histogram recorded value cannot be negative.. 
(org.apache.kafka.coordinator.common.runtime.MultiThreadedEventProcessor$EventProcessorThread:150)
   java.lang.ArrayIndexOutOfBoundsException: Histogram recorded value cannot be 
negative.
        at 
org.HdrHistogram.AbstractHistogram.countsArrayIndex(AbstractHistogram.java:2399)
 ~[HdrHistogram-2.2.2.jar:?]
   ```
   
   It would seem this is resulting in off by one errors - sometimes RPCs are 4 
and sometimes 5. I will remove this check from this test for now


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