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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5490) MapReduce doesn't set the environment variable for children processes
Date Fri, 30 Aug 2013 23:21:51 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13755250#comment-13755250

Hadoop QA commented on MAPREDUCE-5490:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3975//console

This message is automatically generated.
> MapReduce doesn't set the environment variable for children processes
> ---------------------------------------------------------------------
>                 Key: MAPREDUCE-5490
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5490
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1.2.1
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>         Attachments: mr-5490.patch
> Currently, MapReduce uses the command line argument to pass the classpath to the child.
This breaks if the process forks a child that needs the same classpath. Such a case happens
in Hive when it uses map-side joins. I propose that we make MapReduce in branch-1 use the
CLASSPATH environment variable like YARN does.

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