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Posted to mapreduce-issues@hadoop.apache.org by "Krishna Ramachandran (JIRA)" <ji...@apache.org> on 2010/08/19 04:19:17 UTC

[jira] Updated: (MAPREDUCE-1938) Ability for having user's classes take precedence over the system classes for tasks' classpath

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

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

    Attachment: mapred-1938-1

We were going thro' major outstanding issues in the trunk
Thought will upload a preliminary port of Devaraj's patch to trunk + a simple test case


> 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
>             Fix For: 0.22.0
>
>         Attachments: mapred-1938-1, 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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