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https://issues.apache.org/jira/browse/MAPREDUCE-6889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohith Sharma K S updated MAPREDUCE-6889:
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Description:
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.
was:
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.
> 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, 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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