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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-333) On app submission, have RM ask scheduler for queue name
Date Thu, 31 Jan 2013 03:11:14 GMT

    [ https://issues.apache.org/jira/browse/YARN-333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13567303#comment-13567303
] 

Vinod Kumar Vavilapalli commented on YARN-333:
----------------------------------------------

I think instead of adding it to YarnScheduler (which will force us to think more carefully
about synchronization etc), it is better to change {{AppAddedSchedulerEvent}} to pass {{ApplicationSchedulingContext}}
and let schedulers override the queue name at that time. That way we will also be future proof
of any more information needed by schedulers regarding an app.

Also, passing the app scheduling context will let some exotic futuristic scheduler to move
apps across queues at runtime :)
                
> On app submission, have RM ask scheduler for queue name
> -------------------------------------------------------
>
>                 Key: YARN-333
>                 URL: https://issues.apache.org/jira/browse/YARN-333
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.0.2-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>         Attachments: YARN-333.patch
>
>
> Currently, if an app is submitted without a queue, RMAppManager sets the RMApp's queue
to "default".
> A scheduler may wish to make its own decision on which queue to place an app in if none
is specified. For example, when the fair scheduler user-as-default-queue config option is
set to true, and an app is submitted with no queue specified, the fair scheduler should assign
the app to a queue with the user's name.

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