zabetak commented on pull request #2432:
URL: https://github.com/apache/hive/pull/2432#issuecomment-958309007


   > What is responsible for cleaning up these files? Could there be a case 
where the cleanup process happens and then the file is re-created and never 
scheduled for cleanup again?
   
   @belugabehr It's been a while since I have worked on this code but if I 
remember well the operation log file deletion is handled by 
`OperationLogCleaner`. When the query/operation ends it is registered for 
cleanup (see 
https://github.com/apache/hive/blob/6e152aa28bc5116bf9210f9deb0f95d2d73183f7/service/src/java/org/apache/hive/service/cli/operation/Operation.java#L323)
 . The deletion may happen immediately or with some delay as specified by the 
properties. 
   
   If for some reason there is a log event for the **same** query after the 
cleanup then I assume the file will be recreated and it will never be removed 
from the file-system. This could happen even without the changes introduced in 
this PR.


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