Hitesh Shah commented on YARN-2928:

[~vinodkv] Should have probably added more context from the design doc: 

"We assume that the failure semantics of the ATS writer companion is the same 
as the AM. If the ATS writer companion fails for any reason, we try to bring it 
back up up to a specified number of times. If the maximum retries are 
exhausted, we consider it a fatal failure, and fail the application."

> Application Timeline Server (ATS) next gen: phase 1
> ---------------------------------------------------
>                 Key: YARN-2928
>                 URL: https://issues.apache.org/jira/browse/YARN-2928
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Priority: Critical
>         Attachments: ATSv2.rev1.pdf, ATSv2.rev2.pdf, Data model proposal 
> v1.pdf
> We have the application timeline server implemented in yarn per YARN-1530 and 
> YARN-321. Although it is a great feature, we have recognized several critical 
> issues and features that need to be addressed.
> This JIRA proposes the design and implementation changes to address those. 
> This is phase 1 of this effort.

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