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https://issues.apache.org/jira/browse/MAPREDUCE-1598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amareshwari Sriramadasu updated MAPREDUCE-1598:
-----------------------------------------------

    Affects Version/s:     (was: 0.21.0)
                       0.20.1
        Fix Version/s:     (was: 0.21.0)
                       0.20.3

"Disabling job history if anything fails" is not present in branch 0.21 or 
trunk. It is removed in job history refactoring through MAPREDUCE-157. Even the 
configuration mapreduce.jobtracker.jobhistory.completed.location is removed in 
the same jira.
So, the bug is present in 0.20.* and earlier versions.

> Wrongly configured 'hadoop.job.history.user.location' can cause jobs to be 
> pinned in JobTracker's memory forever
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1598
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1598
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 0.20.1
>            Reporter: Amar Kamat
>            Priority: Blocker
>             Fix For: 0.20.3
>
>
> Wrongly configured 'hadoop.job.history.user.location' can disable 
> job-history. Jobs retires when JobHistory notifies the JobTracker after 
> moving the history file to the done folder (i.e 
> mapreduce.jobtracker.jobhistory.completed.location). If the JobHistory gets 
> disabled, JobTracker would not receive any notification and thus jobs will be 
> pinned in JobTracker's memory forever.

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