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https://issues.apache.org/jira/browse/MAPREDUCE-5653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359063#comment-14359063
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Allen Wittenauer commented on MAPREDUCE-5653:
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bq. Allen, do you think there's more than just this one Xmx passthrough that's
affecting DistCP?
Yes. but those are outside the scope of this jira.
bq. Hadn't seen MAPREDUCE-5785. Agree that that's an excellent direction.
As I mentioned way above, for the same reasons that '5785 is in trunk, this
change is also only in trunk. Hypothetically, they should work very well
together.
> DistCp does not honour config-overrides for mapreduce.[map,reduce].memory.mb
> ----------------------------------------------------------------------------
>
> Key: MAPREDUCE-5653
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5653
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distcp
> Affects Versions: 0.23.9, 2.2.0
> Reporter: Mithun Radhakrishnan
> Assignee: Ratandeep Ratti
> Fix For: 3.0.0
>
> Attachments: MAPREDUCE-5653.branch-0.23.patch,
> MAPREDUCE-5653.branch-2.patch, MAPREDUCE-5653.trunk.2.patch,
> MAPREDUCE-5653.trunk.patch
>
>
> When a DistCp job is run through Oozie (through a Java action that launches
> DistCp), one sees that mapred.child.java.opts as set from the caller is
> honoured by DistCp. But, DistCp doesn't seem to honour any overrides for
> configs mapreduce.[map,reduce].memory.mb.
> Problem has been identified. I'll post a patch shortly.
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