Varun Saxena updated YARN-2136:
    Attachment: YARN-2136.patch

If there are pending events in Dispatcher queue when the State store becomes 
fenced, there is no point in processing these events when RM switches to 
standby. A fenced state will avoid that.

> RMStateStore can explicitly handle store/update events when fenced
> ------------------------------------------------------------------
>                 Key: YARN-2136
>                 URL: https://issues.apache.org/jira/browse/YARN-2136
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
>            Assignee: Varun Saxena
>         Attachments: YARN-2136.patch
> RMStateStore can choose to handle/ignore store/update events upfront instead 
> of invoking more ZK operations if state store is at fenced state. 

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