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From "Mohammad Kamrul Islam (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4568) Throw "early" exception when duplicate files or archives are found in distributed cache
Date Mon, 20 Aug 2012 19:35:38 GMT
Mohammad Kamrul Islam created MAPREDUCE-4568:
------------------------------------------------

             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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