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https://issues.apache.org/jira/browse/MAPREDUCE-849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038793#comment-13038793
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Arun C Murthy commented on MAPREDUCE-849:
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Ok, this patch has a big problem.
Well, not the patch.
The crux is that we shouldn't have added the new config knobs to
mapred-default.xml. Configuration is setup to look for new config knobs when
old ones are used, which is fine. However, the new config knobs take precedence
over old ones and by setting new ones in mapred-default.xml the old ones are
never found...
> Renaming of configuration property names in mapreduce
> -----------------------------------------------------
>
> Key: MAPREDUCE-849
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-849
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.21.0
>
> Attachments: Config changes.xls, Config changes.xls, patch-849-1.txt,
> patch-849-2.txt, patch-849-3.txt, patch-849.txt
>
>
> In-line with HDFS-531, property names in configuration files should be
> standardized in MAPREDUCE.
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