Jason Lowe commented on YARN-1963:

I'd like to see changing app priorities addressed as it is a common ask from 
users.  In many cases jobs are submitted to the cluster via some 
workflow/pipeline, and they would like to change the priority of apps already 
submitted.  Otherwise they have to update their workflow/pipeline to change the 
submit-time priority, kill the active jobs, and resubmit the apps for the 
priority to take effect.  Then eventually they need to change it all back to 
normal priorities later.

> Support priorities across applications within the same queue 
> -------------------------------------------------------------
>                 Key: YARN-1963
>                 URL: https://issues.apache.org/jira/browse/YARN-1963
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: api, resourcemanager
>            Reporter: Arun C Murthy
>            Assignee: Sunil G
>         Attachments: YARN Application Priorities Design.pdf, YARN Application 
> Priorities Design_01.pdf
> It will be very useful to support priorities among applications within the 
> same queue, particularly in production scenarios. It allows for finer-grained 
> controls without having to force admins to create a multitude of queues, plus 
> allows existing applications to continue using existing queues which are 
> usually part of institutional memory.

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