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https://issues.apache.org/jira/browse/MAPREDUCE-1920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885866#action_12885866
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Amareshwari Sriramadasu commented on MAPREDUCE-1920:
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Can you bring up your cluster with mapreduce.jobtracker.retirejobs set to false 
and run your job? That would confirm the problem is with retire. 
You can also enable completed job store, by setting  
mapreduce.jobtracker.persist.jobstatus.active to true and 
mapreduce.jobtracker.persist.jobstatus.hours to 1. Then, job details would be 
available for an hour.

> 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
>            Priority: Critical
>
> Calling Job.getCounters() after the job has completed (successfully) returns 
> null.

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