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https://issues.apache.org/jira/browse/MAPREDUCE-5650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850985#comment-13850985
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Sandy Ryza commented on MAPREDUCE-5650:
---------------------------------------

If I understand correctly, the issue is that the default 
(mapreduce.task.profile.params) params will be supplied even when more specific 
params are specified.  Was the behavior different in MR1?  Want to make sure 
this is not an incompatible change.

> Job fails when hprof mapreduce.task.profile.map/reduce.params is specified
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5650
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5650
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.2.0
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>         Attachments: MAPREDUCE-5650.v01.patch, MAPREDUCE-5650.v02.patch
>
>
> When one uses dedicated hprof mapreduce.task.profile.map.params or 
> mapreduce.task.profile.reduce.params, the profiled tasks will fail to launch 
> because hprof parameters are supplied to the child jvm twice.



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