[jira] [Updated] (MAPREDUCE-6889) Provide an API Job#close to shutdown MR client services.

["Rohith Sharma K S (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rohith Sharma K S updated MAPREDUCE-6889:
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    Summary: Provide an API Job#close to shutdown MR client services.  (was: FileSystem leak when Job#submit() used when ATS1.5 enabled)

> 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
>
>
> 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, Job class should provide a API to close the services very similar to JobClient#close. 



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