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https://issues.apache.org/jira/browse/YARN-3446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhihai xu updated YARN-3446:
----------------------------
    Attachment: YARN-3446.001.patch

> FairScheduler HeadRoom calculation should exclude nodes in the blacklist.
> -------------------------------------------------------------------------
>
>                 Key: YARN-3446
>                 URL: https://issues.apache.org/jira/browse/YARN-3446
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>         Attachments: YARN-3446.000.patch, YARN-3446.001.patch
>
>
> FairScheduler HeadRoom calculation should exclude nodes in the blacklist.
> MRAppMaster does not preempt the reducers because for Reducer preemption 
> calculation, headRoom is considering blacklisted nodes. This makes jobs to 
> hang forever(ResourceManager does not assign any new containers on 
> blacklisted nodes but availableResource AM get from RM includes blacklisted 
> nodes available resource).
> This issue is similar as YARN-1680 which is for Capacity Scheduler.



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