[jira] [Commented] (YARN-4022) queue not remove from webpage(/cluster/scheduler) when delete queue in xxx-scheduler.xml

["Daniel Templeton (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-4022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15613638#comment-15613638 ] 

Daniel Templeton commented on YARN-4022:
----------------------------------------

Thanks for the patch, [~forrestchen].  This is definitely useful functionality.

It the patch you're using a thread that watches for updates to the configuration so it can remove unused queues.  YARN-5556 is adding the same capability for fair scheduler, and that patch handles the delete during the reload of the configuration.  Think that approach could work for fair scheduler?

I'd also like to see some unit tests to cover the new functionality.

> queue not remove from webpage(/cluster/scheduler) when delete queue in xxx-scheduler.xml
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-4022
>                 URL: https://issues.apache.org/jira/browse/YARN-4022
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler, resourcemanager
>    Affects Versions: 2.7.1
>            Reporter: forrestchen
>              Labels: oct16-medium, scheduler
>         Attachments: YARN-4022.001.patch, YARN-4022.002.patch, YARN-4022.003.patch, YARN-4022.004.patch
>
>
> When I delete an existing queue by modify the xxx-schedule.xml, I can still see the queue information block in webpage(/cluster/scheduler) though the 'Min Resources' items all become to zero and have no item of 'Max Running Applications'.
> I can still submit an application to the deleted queue and the application will run using 'root.default' queue instead, but submit to an un-exist queue will cause an exception.
> My expectation is the deleted queue will not displayed in webpage and submit application to the deleted queue will act just like the queue doesn't exist.
> PS: There's no application running in the queue I delete.
> Some related config in yarn-site.xml:
> {code}
> <property>
>         <name>yarn.scheduler.fair.user-as-default-queue</name>
>         <value>false</value>
> </property>
> <property>
>         <name>yarn.scheduler.fair.allow-undeclared-pools</name>
>         <value>false</value>
> </property>
> {code}
> a related question is here: http://stackoverflow.com/questions/26488564/hadoop-yarn-why-the-queue-cannot-be-deleted-after-i-revise-my-fair-scheduler-xm



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