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https://issues.apache.org/jira/browse/MAPREDUCE-6889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16020998#comment-16020998
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Sunil G commented on MAPREDUCE-6889:
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+1 for the patch. Thanks for correct the jira title as well.
I could commit tomorrow if there are no objections.
> Provide an API Job#close to shutdown MR client services.
> --------------------------------------------------------
>
> Key: MAPREDUCE-6889
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6889
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Rohith Sharma K S
> Assignee: Rohith Sharma K S
> Attachments: MAPREDUCE-6889.0001.patch, MAPREDUCE-6889.0002.patch
>
>
> ATS1.5 uses FileSystemTimelineWriter which creates FS object on every writer
> initialization. If writer is not closed, then there is possibility of OOM see
> YARN-5438 fixes closing FS object.
> TimelineClient is used by YarnClient. So all the user who uses YarnClient
> with ATS1.5 need to stop service properly. Otherwise there is big chance of
> FS object leak.
> Of course MR uses YARN client submit job. If MR do not stop YarnClient then
> there is FS object leak.
> JobClient provides a API to stop all these service using *JobClient#close*.
> But many MR clients uses *Job* object to submit a job. But do not stop
> started services by default.
> So, provide a API *Job#close* to shutdown MR client services. This API can be
> utilized by caller explicitly to stop service which avoids FS leak.
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