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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1478) Separate the mapred.lib and mapreduce.lib classes to a different jar and include the user jar ahead of the lib jar.
Date Wed, 10 Feb 2010 22:22:32 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832246#action_12832246
] 

Todd Lipcon commented on MAPREDUCE-1478:
----------------------------------------

I assume this would be somewhat optional, right? That is, if the user doesn't put a mapreduce-lib.jar
in their job.jar/lib/, it will use the system one on the TT's classpath? We'll just allow
users to use a local one when they like?

> Separate the mapred.lib and mapreduce.lib classes to a different jar and include the
user jar ahead of the lib jar.
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1478
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1478
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: task
>            Reporter: Owen O'Malley
>
> Currently the user can't include updated library jars as part of their job. By pulling
out the lib classes we can include the classes (eg. TextInputFormat) in the user's jar and
get their version and not the system installed one.

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