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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4462) Scheduler should prevent certain application from being preempted
Date Wed, 16 Dec 2015 14:27:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060039#comment-15060039
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Sunil G commented on YARN-4462:
-------------------------------

Yes Tao Jie. I understood your scenaruo where cost of one long running application is more.
YARN-4108 comes up with this improvement. There will be policies which user can configure
to selected app. This will surely cover your case. 

> Scheduler should prevent certain application from being preempted
> -----------------------------------------------------------------
>
>                 Key: YARN-4462
>                 URL: https://issues.apache.org/jira/browse/YARN-4462
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.6.0
>            Reporter: Tao Jie
>
> When scheduler preemption is enabled, applications could be preempted if they obtain
resource over they should take. 
> When a mapreduce application is preempted some resource, it just runs slower. However,
when the preempted application is a long-run service, such as tomcat running in slider, the
service would fail.
> So we should have a flag for application to indicate the scheduler that those application
should not be preempted. 



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