leixm commented on PR #2725:
URL: https://github.com/apache/celeborn/pull/2725#issuecomment-2333063844

   > After discussing with @SteNicholas , we thought of two reasons why 
removeBatch is called after cleanup:
   > 
   > 1. stage retry without [[CELEBORN-1496] Differentiate map results with 
only different stageAttemptIdĀ 
#2609](https://github.com/apache/celeborn/pull/2609) , the retried task has the 
same (shuffleId, mapId, attemptId), which has already mapper-ended in last retry
   > 2. attempt 0 succeeds in `write` and celeborn client successfully called 
mapperEnd, but Spark thinks it's failed and rerun other attempts, then other 
attempts cleans up pushState because of mapper ended.
   
   Agree, scene 2 often happens in our production environment.


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