Github user zuotingbing commented on the issue:

    https://github.com/apache/spark/pull/19034
  
    Hmm, this problem is common , i think some helpful tool scripts is to be 
expected to make spark more robust, and are useful for users. :)
    
    Similarly In Hive, there is a tool script ClearDanglingScratchDir.sh, which 
help to clean dangling scratch directory left behind in some cases, such as 
when vm restarts and leave no chance for Hive to run shutdown hook.


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