turboFei edited a comment on issue #26086: [SPARK-29302] Make the file name of 
a task for dynamic partition overwrite and specified abs path be unique
URL: https://github.com/apache/spark/pull/26086#issuecomment-540982545
 
 
   Oh, It seems that this issue is related with 
https://github.com/apache/spark/pull/24142.
   I just read the comments of that, it seems that there are some risk that 
cause duplicate result.
   
   @ajithme  @vanzin  @LantaoJin 
   
   How about  using this method to name a task file for dynamic partition 
overwrite only?
   
   Because for this cases, it will keep a filesToMove set, which would not 
cause duplicate result.
   
   
   P.S:
   I doubt whether it would cause duplicate result for non dynamic partition 
overwrite case.
   
   Should outputCommitCoordinator decide which task can commit?

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