Mohammad Kamrul Islam created MAPREDUCE-4568:
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Summary: Throw "early" exception when duplicate files or archives
are found in distributed cache
Key: MAPREDUCE-4568
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4568
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Mohammad Kamrul Islam
According to #MAPREDUCE-4549, Hadoop 2.x throws exception if duplicates found
in cacheFiles or cacheArchives. The exception throws during job submission.
This JIRA is to throw the exception ==early== when it is first added to the
Distributed Cache through addCacheFile or addFileToClassPath.
It will help the client to decide whether to fail-fast or continue w/o the
duplicated entries.
Alternatively, Hadoop could provide a knob where user will choose whether to
throw error( coming behavior) or silently ignore (old behavior).
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