[jira] [Resolved] (YARN-306) FIFO scheduler doesn't respect changing job priority

["Jason Lowe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Lowe resolved YARN-306.
-----------------------------
    Resolution: Won't Fix

bq. Thinking that it may violate FIFO scheduling policy.
Well if we're worried about that then the same logic would apply to the CapacityScheduler.  It also was using a FIFO scheduling policy before priority support was added.  All that adding it to the FIFO scheduler would mean is that jobs would be in priority order then FIFO within the same priority.

However I agree with Jian that we probably don't need to add the support unless there is sufficient demand.  If users really want the FIFO scheduler with priority then they can run the CapacityScheduler with a single queue which should be effectively equivalent.

> FIFO scheduler doesn't respect changing job priority
> ----------------------------------------------------
>
>                 Key: YARN-306
>                 URL: https://issues.apache.org/jira/browse/YARN-306
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler
>    Affects Versions: 2.0.2-alpha
>            Reporter: Nishan Shetty
>            Assignee: Rohith Sharma K S
>
> 1.Submit job
> 2.Change the job priority using setPriority() or CLI command ./mapred job-set-priority <job-id> <priority>
> Observe that Job priority is not changed.



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