Naganarasimha G R commented on YARN-4462:

hi [~Tao Jie],
bq. However we apply FairScheduler in our system. I would like to bring 
queue-level-disable-preemption into FairScheduler.
I am not sure about similar support in FS. May be you can update the title 
accordingly so that right person can comment on it. 

> 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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