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https://issues.apache.org/jira/browse/MAPREDUCE-920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748399#action_12748399
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Arun C Murthy commented on MAPREDUCE-920:
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As noted
https://issues.apache.org/jira/browse/MAPREDUCE-478?focusedCommentId=12740186&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12740186
we cannot put the new parameters in mapred-default.xml until 0.22 for backward
compatibility.
> Add jvm params introduced in MAPREDUCE-478 to mapred-default.xml
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-920
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-920
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: documentation
> Reporter: Ramya R
> Assignee: Arun C Murthy
> Priority: Minor
> Fix For: 0.22.0
>
>
> mapred-default.xml still provides definition for old params which were
> deprecated in MAPREDUCE:478. It should be changed to define the new params
> such as mapred.map.child.java.opts, mapred.reduce.child.java.opts,
> mapred.map.child.env, mapred.reduce.child.env, mapred.map.child.ulimit,
> mapred.reduce.child.ulimit.
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