Mit Desai commented on YARN-2375:

Thanks for reviewing [~zjshen].
One clarification.
bq. 1. We should still let DS work when the timeline service is disable, and we 
just need to prevent sending the timeline data to the timeline server while the 
DS app is running.
Do you mean that we should not check for TIMELINE_SERVICE_ENABLED flag in the 
Application Master and rather have it work same way that it was doing before 
and only check that flag while sending data to timeline server?

> Allow enabling/disabling timeline server per framework
> ------------------------------------------------------
>                 Key: YARN-2375
>                 URL: https://issues.apache.org/jira/browse/YARN-2375
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Jonathan Eagles
>            Assignee: Mit Desai
>         Attachments: YARN-2375.patch, YARN-2375.patch
> This JIRA is to remove the ats enabled flag check within the 
> TimelineClientImpl. Example where this fails is below.
> While running secure timeline server with ats flag set to disabled on 
> resource manager, Timeline delegation token renewer throws an NPE. 

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