Zhijie Shen commented on YARN-2928:

One correlated issue I want to raise here is aggregated log service. Currently, 
only JHS is serving the aggregated logs for completed MR jobs and control the 
log file retention. It doesn't cover the different workloads on YARN as well as 
the long running services that will never end. We thought of making ATS the hub 
to serve aggregated logs before, but didn't achieve it in the time frame of ATS 
current gen.

Therefore, though aggregated log service is the part of the major goal of ATS 
next gen - scalability, I hope we'd better take into account in the future, 
when designing the reader and GUI.

> 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
>            Assignee: Sangjin Lee
>            Priority: Critical
>         Attachments: ATSv2.rev1.pdf, ATSv2.rev2.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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