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https://issues.apache.org/jira/browse/MAPREDUCE-4421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13410701#comment-13410701
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Arun C Murthy commented on MAPREDUCE-4421:
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Bobby - if I wasn't clear, apologies.
However yes, the ability for MR apps to reference an existing HDFS file (jar)
via dist-cache is a very important requirement.
> Remove dependency on deployed MR jars
> -------------------------------------
>
> Key: MAPREDUCE-4421
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4421
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 2.0.0-alpha
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
>
> Currently MR AM depends on MR jars being deployed on all nodes via implicit
> dependency on YARN_APPLICATION_CLASSPATH.
> We should stop adding mapreduce jars to YARN_APPLICATION_CLASSPATH and,
> probably, just rely on adding a shaded MR jar along with job.jar to the
> dist-cache.
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