turboFei edited a comment on issue #25863: 
[SPARK-28945][SPARK-29037][CORE][SQL] Fix the issue that spark gives duplicate 
result and support concurrent file source write operations write to different 
partitions in the same table.
URL: https://github.com/apache/spark/pull/25863#issuecomment-535990285
 
 
   I have tried make dir before doing this check, and thrown exception when it 
existed.
   But when exception thrown  after that, I can not ensure it would be cleaned 
up.
    And it may cause other job fail.
   I will try to resolve it.

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