Naganarasimha G R commented on YARN-3623:

This would be good [~vinodkv], 
but was under the impression that timeline service version is not required for 
versions before ATS 1.5 and this would be introduced in YARN-4234 (as part of 
ATS 1.5) and the required modifications where ever applicable in ATSv2 would be 
handled in this jira (earlier ATS subjira). Ok anyway can create another 
subjira in 2928 to handle usage of this newly introduced version.

> We should have a config to indicate the Timeline Service version
> ----------------------------------------------------------------
>                 Key: YARN-3623
>                 URL: https://issues.apache.org/jira/browse/YARN-3623
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Naganarasimha G R
>         Attachments: YARN-3623-2015-11-19.1.patch
> So far RM, MR AM, DA AM added/changed new config to enable the feature to 
> write the timeline data to v2 server. It's good to have a YARN 
> timeline-service.version config like timeline-service.enable to indicate the 
> version of the running timeline service with the given YARN cluster. It's 
> beneficial for users to more smoothly move from v1 to v2, as they don't need 
> to change the existing config, but switch this config from v1 to v2. And each 
> framework doesn't need to have their own v1/v2 config.

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