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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5556) Support for deleting queues without requiring a RM restart
Date Thu, 05 Jan 2017 19:20:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-5556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15802255#comment-15802255

Wangda Tan commented on YARN-5556:

Just offline discussed with [~xgong]. 

I think we don't need the additional DELETED state, first it generate some maintenance overheads,
for example we need to maintain state transition to/from of the DELETED state. And since by
design a queue can be deleted only if queue is stopped and no app running, so the impact of
typo should be minimum. Our preference is simply remove queue from config.

And for re-distribution of stopped/deleted queue. For delete queue it should be obvious, since
the queue is gone, sum of its siblings should be 100. For stopped queue, our expectation is,
it will be reactivated at some time. So it will be better to keep the capacity as-is, and
admin can update max-capacity of its siblings to make sure queue capacity can be utilized.

I think we need to update design doc to make it up-to-date.


> Support for deleting queues without requiring a RM restart
> ----------------------------------------------------------
>                 Key: YARN-5556
>                 URL: https://issues.apache.org/jira/browse/YARN-5556
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Xuan Gong
>            Assignee: Naganarasimha G R
>         Attachments: YARN-5556.v1.001.patch, YARN-5556.v1.002.patch, YARN-5556.v1.003.patch,
> Today, we could add or modify queues without restarting the RM, via a CS refresh. But
for deleting queue, we have to restart the ResourceManager. We could support for deleting
queues without requiring a RM restart

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