Zhijie Shen created YARN-2521:
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             Summary: 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: 2.5.0, 3.0.0
            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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