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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