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https://issues.apache.org/jira/browse/MAPREDUCE-1920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896457#action_12896457
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Amareshwari Sriramadasu commented on MAPREDUCE-1920:
----------------------------------------------------

I see that patch adds 
conf.setUser(UserGroupInformation.getCurrentUser().getUserName()) in JobConf 
for many testcases. I did not understand why is that needed here. I ran 
TestTrackerReservation and TestClusterStatus with the attached patch, the tests 
are still failing. 

> Job.getCounters() returns null when using a cluster
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-1920
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1920
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.21.0
>            Reporter: Aaron Kimball
>            Assignee: Tom White
>            Priority: Critical
>         Attachments: MAPREDUCE-1920.patch, MAPREDUCE-1920.patch
>
>
> Calling Job.getCounters() after the job has completed (successfully) returns 
> null.

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