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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5653) DistCp does not honour config-overrides for mapreduce.[map,reduce].memory.mb
Date Sun, 01 Mar 2015 06:50:05 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14341988#comment-14341988

Allen Wittenauer commented on MAPREDUCE-5653:

Changing a default like this is an incompatible and/or potentially surprising change. This
put it in line with all of the other changes that have happened with heap management in trunk
(MAPREDUCE-5785, HADOOP-10950, etc).

So I'm +1 this change for trunk and will commit it shortly.

> 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: trunk, 0.23.9, 2.2.0
>            Reporter: Mithun Radhakrishnan
>            Assignee: Mithun Radhakrishnan
>         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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