Xuan Gong commented on YARN-3999:

Can we move 
in that case, when we shut dow the RM, we transit RM to standby first (stop all 
the active services), then stop all the alway-on services ?

> Add a timeout when drain the dispatcher
> ---------------------------------------
>                 Key: YARN-3999
>                 URL: https://issues.apache.org/jira/browse/YARN-3999
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-3999.patch, YARN-3999.patch
> If external systems like ATS, or ZK becomes very slow, draining all the 
> events take a lot of time. If this time becomes larger than 10 mins, all 
> applications will expire. We can add a timeout and stop the dispatcher even 
> if not all events are drained.

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