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https://issues.apache.org/jira/browse/MAPREDUCE-17?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J resolved MAPREDUCE-17.
------------------------------

    Resolution: Not A Problem

This isn't an issue anymore. I've not noticed it with branch-1, nor is it an 
issue with MR2.
                
> Changing priority of a completed job causes problems in JobInProgressListeners
> ------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-17
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-17
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Hemanth Yamijala
>
> If the priority of a completed job is changed, a {{JobChangeEvent}} is raised 
> and the {{JobInProgressListeneners}}, like the capacity scheduler, are 
> notified. Most implementations handle the event by re-sorting their data 
> structures, and thus could end up re-inserting the completed job into their 
> lists.

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