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https://issues.apache.org/jira/browse/MAPREDUCE-1902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884435#action_12884435
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Doug Cutting commented on MAPREDUCE-1902:
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This sounds like a good thing to explore. DistributedCache was added when
folks wanted to distribute stuff besides the job jar, but merging the two might
be good.
> job jar file is not distributed via DistributedCache
> ----------------------------------------------------
>
> Key: MAPREDUCE-1902
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1902
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Joydeep Sen Sarma
>
> The main jar file for an job is not distributed via the distributed cache. It
> would be more efficient if that were the case.
> It would also allow us to comprehensively tackle the inefficiencies in
> distribution of jar files and such (see MAPREDUCE-1901).
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