Zhijie Shen resolved YARN-2521.
    Resolution: Duplicate

Close the ticket as the duplicate of YARN-2928

> Reliable TimelineClient
> -----------------------
>                 Key: YARN-2521
>                 URL: https://issues.apache.org/jira/browse/YARN-2521
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
> The timeline server is likely to be in outage. It would be beneficial if the 
> timeline client can cache the timeline entity locally after the application 
> pass it to the client, and before the client successfully hands it over to 
> the server.
> To prevent the entity from being lost, we may want to persist it into the 
> secondary storage, such as HDFS and Leveldb.

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