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https://issues.apache.org/jira/browse/YARN-3047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14324407#comment-14324407
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Varun Saxena commented on YARN-3047:
------------------------------------

bq. As far as I understand, I guess we would need it to support YARN CLI 
commands(to get applications, application attempts,etc.)
I mean in old code, it was used for above. I guess we need to support the 
current CLI operations(by RPC) even now. These CLI operations  are currently 
invoked using AHSClient to query app attempts, apps etc., if not found in RM. 

> [Data Serving] Set up ATS reader with basic request serving structure and 
> lifecycle
> -----------------------------------------------------------------------------------
>
>                 Key: YARN-3047
>                 URL: https://issues.apache.org/jira/browse/YARN-3047
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
>         Attachments: YARN-3047.001.patch
>
>
> Per design in YARN-2938, set up the ATS reader as a service and implement the 
> basic structure as a service. It includes lifecycle management, request 
> serving, and so on.



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