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From "Krishna Ramachandran (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1938) Ability for having user's classes take precedence over the system classes for tasks' classpath
Date Sat, 04 Sep 2010 02:08:34 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Krishna Ramachandran updated MAPREDUCE-1938:
--------------------------------------------

    Attachment: mapred-1938-3.patch

revised per previous comment 
+ Luke's test case review - vector is API requirement - can't modify

Yes there will be a separate jira for bin/hadoop client command line changes

> Ability for having user's classes take precedence over the system classes for tasks'
classpath
> ----------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1938
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1938
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: job submission, task, tasktracker
>            Reporter: Devaraj Das
>            Assignee: Krishna Ramachandran
>             Fix For: 0.22.0
>
>         Attachments: mapred-1938-1, mapred-1938-2.patch, mapred-1938-3.patch, mr-1938-bp20.1.patch,
mr-1938-bp20.patch
>
>
> It would be nice to have the ability in MapReduce to allow users to specify for their
jobs alternate implementations of classes that are already defined in the MapReduce libraries.
For example, an alternate implementation for CombineFileInputFormat. 

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