Hudson commented on MAPREDUCE-6889:

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #12018 (See 
MAPREDUCE-6889. Add Job#close API to shutdown MR client services. (sunilg: rev 
* (edit) 
* (edit) 

> Add Job#close API 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
>             Fix For: 2.9.0, 3.0.0-beta1
>         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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