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From "Siqi Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3176) In Fair Scheduler, child queue should inherit maxApp from its parent
Date Thu, 06 Aug 2015 21:05:07 GMT

    [ https://issues.apache.org/jira/browse/YARN-3176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660787#comment-14660787
] 

Siqi Li commented on YARN-3176:
-------------------------------

One example could be queueMaxAppsDefault is set to 50, and "parent" has a maxRunningApps of
25. But if the child queues of the "parent" do not have maxRunningApps set, they are going
to get 50 as their max instead of 25. In this case, MaxRunningAppEnforcer could end up letting
more apps running in the child queues.

Also, I don't think there is a direct way to find out the maxRunningApps number of a parent
queue from the scheduler UI.

> In Fair Scheduler, child queue should inherit maxApp from its parent
> --------------------------------------------------------------------
>
>                 Key: YARN-3176
>                 URL: https://issues.apache.org/jira/browse/YARN-3176
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Siqi Li
>            Assignee: Siqi Li
>         Attachments: YARN-3176.v1.patch, YARN-3176.v2.patch
>
>
> if the child queue does not have a maxRunningApp limit, it will use the queueMaxAppsDefault.
This behavior is not quite right, since queueMaxAppsDefault is normally a small number, whereas
some parent queues do have maxRunningApp set to be more than the default



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