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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5968) Work directory is not deleted in DistCache if Exception happen in downloadCacheObject.
Date Fri, 11 Jul 2014 20:03:06 GMT
zhihai xu created MAPREDUCE-5968:
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             Summary: Work directory is not deleted in  DistCache if Exception happen in downloadCacheObject.
                 Key: MAPREDUCE-5968
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5968
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv1
            Reporter: zhihai xu
            Assignee: zhihai xu


Work directory is not deleted in  DistCache if Exception happen in downloadCacheObject. In
downloadCacheObject, the cache file will be copied to temporarily work directory first, then
the  work directory will be renamed to the final directory. If IOException happens during
the copy, the 
 work directory will not be deleted. This will cause garbage data left in local disk cache.
For example If the MR application use Distributed Cache to send a very large Archive/file(50G),
if the disk is full during the copy, then the IOException will be triggered, the work directory
will be not deleted or renamed and occupy a big chunk of disk space.





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