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Karthik Kambatla commented on YARN-4462: ---------------------------------------- Today, FairScheduler allows disabling preemption *for* a queue. It makes sense to add the ability to disable preemption *from* a queue as well. I have a couple of other FairScheduler items I am working on before I am able to get to this. Let me know if anyone is interested in working on this. > FairScheduler: Disallow preemption from a queue > ----------------------------------------------- > > Key: YARN-4462 > URL: https://issues.apache.org/jira/browse/YARN-4462 > Project: Hadoop YARN > Issue Type: Improvement > Components: fairscheduler > Affects Versions: 2.6.0 > Reporter: Tao Jie > Assignee: Karthik Kambatla > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)