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https://issues.apache.org/jira/browse/MAPREDUCE-2338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13272053#comment-13272053
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OZAWA Tsuyoshi commented on MAPREDUCE-2338:
-------------------------------------------

I'm sorry for my making a mistake about JIRA system.
James haven't worked this problem for a long time(one year), so I threw this 
patch to fix this problem.
                
> Deprecate field selection methods on JobConf
> --------------------------------------------
>
>                 Key: MAPREDUCE-2338
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2338
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Tom White
>            Assignee: James Warren
>              Labels: newbie
>         Attachments: MR-2338.1.patch, MR-2338.2.patch, MR2338.3.patch
>
>
> KeyFieldBasedComparator and KeyFieldBasedPartitioner are libraries so should 
> not appear as getters and setters in JobConf. For the new API there are 
> getters and setters on KeyFieldBasedComparator and KeyFieldBasedPartitioner 
> themselves - we should add the equivalent to the old API and deprecate the 
> references in JobConf.

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