Naganarasimha G R commented on YARN-4044:

Thanks for pointing out [~sunilg], Now i recollect why its like that, its 
because of {{CompositEventHandler in MultiThreadedDispatcher}} which is used to 
dispatch the events in multiple threads and all the events related to a given 
app they want to send it in one thread. And equals we cannot ensure using appid 
hence equals is not overwritten. I feel the design is not appropriate here but 
anyway i am modifying the design so modifications in your current patch should 
for it should be ok.

> Running applications information changes such as movequeue is not published 
> to TimeLine server
> ----------------------------------------------------------------------------------------------
>                 Key: YARN-4044
>                 URL: https://issues.apache.org/jira/browse/YARN-4044
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager, timelineserver
>    Affects Versions: 2.7.0
>            Reporter: Sunil G
>            Assignee: Sunil G
>            Priority: Critical
>         Attachments: 0001-YARN-4044.patch, 0002-YARN-4044.patch, 
> 0003-YARN-4044.patch, 0004-YARN-4044.patch
> SystemMetricsPublisher need to expose an appUpdated api to update any change 
> for a running application.
> Events can be 
>       - change of queue for a running application.
>         - change of application priority for a running application.
> This ticket intends to handle both RM and timeline side changes. 

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