Zhijie Shen updated YARN-3588:
         Component/s: timelineserver
    Target Version/s: YARN-2928

> Timeline entity uniqueness
> --------------------------
>                 Key: YARN-3588
>                 URL: https://issues.apache.org/jira/browse/YARN-3588
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
> In YARN-3051, we have some discussion about how to uniquely identify an 
> entity. Sangjin and some other folks propose to only uniquely identify an 
> entity by <type, id> in the scope of a single app. This is different from 
> entity uniqueness in ATSv1, where <type, id> can globally identify an entity. 
> This is going to affect the way of fetching a single entity, and raise the 
> compatibility issue. Let's continue our discussion here to unblock YARN-3051.

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