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https://issues.apache.org/jira/browse/YARN-3887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14653002#comment-14653002
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Rohith Sharma K S commented on YARN-3887:
-----------------------------------------

One comment
# TreeSet will throw NullPointerException while adding/removing null object. 
Suppose, SchedulintApplicationAttempt is not created then 
{{application.getCurrentAppAttempt()}} will be null which would throw NPE. I 
think this has to be handled in 
{{AbstractComparatorOrderingPolicy#removeSchedulableEntity}} and 
{{AbstractComparatorOrderingPolicy#addSchedulableEntity}}

> Support for changing Application priority during runtime
> --------------------------------------------------------
>
>                 Key: YARN-3887
>                 URL: https://issues.apache.org/jira/browse/YARN-3887
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler, resourcemanager
>            Reporter: Sunil G
>            Assignee: Sunil G
>         Attachments: 0001-YARN-3887.patch, 0002-YARN-3887.patch, 
> 0003-YARN-3887.patch, 0004-YARN-3887.patch, 0005-YARN-3887.patch
>
>
> After YARN-2003, adding support to change priority of an application after 
> submission. This ticket will handle the server side implementation for same.
> A new RMAppEvent will be created to handle this, and will be common for all 
> schedulers.



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