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From "Ravi Prakash (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4521) mapreduce.user.classpath.first incompatibility with 0.20/1.x
Date Thu, 11 Oct 2012 20:49:03 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13474495#comment-13474495
] 

Ravi Prakash commented on MAPREDUCE-4521:
-----------------------------------------

I tested that MRApps now picks up the deprecated config too, and treats it same as the new
one
                
> mapreduce.user.classpath.first incompatibility with 0.20/1.x
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-4521
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4521
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.1, 2.0.0-alpha
>            Reporter: Jason Lowe
>            Assignee: Ravi Prakash
>         Attachments: MAPREDUCE-4521.patch
>
>
> In Hadoop 0.20 or 1.x, jobs can specify the user's classpath should appear first by setting
the property mapreduce.user.classpath.first to true in the job configuration.  However in
Hadoop 0.23 or 2.x, this has no effect, as the corresponding property there is mapreduce.job.user.classpath.first.

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