Zhijie Shen commented on YARN-2320:

Upload a huge patch, but it doesn't have complex logic, but removing the old 
application history store stack, including:

1. Null|Memory|FileSystemApplicationHistoryStore, the related protobuf classes, 
and ApplicationHistoryManagerImpl based on it.
2. RMApplicationHistoryWriter, the events used by it, and the invokes in the 
scope of RM.
3. Unnecessary configurations in YarnConfiguration.

I addition, I've fixed the test cases based on ApplicationHistoryStore, and 
rename ApplicationHistoryManagerOnTimelineStore to 

> Removing old application history store after we store the history data to 
> timeline store
> ----------------------------------------------------------------------------------------
>                 Key: YARN-2320
>                 URL: https://issues.apache.org/jira/browse/YARN-2320
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>         Attachments: YARN-2320.1.patch
> After YARN-2033, we should deprecate application history store set. There's 
> no need to maintain two sets of store interfaces. In addition, we should 
> conclude the outstanding jira's under YARN-321 about the application history 
> store.

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