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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3547) Apps that have no resource demand should not participate scheduling
Date Mon, 27 Apr 2015 18:20:38 GMT

    [ https://issues.apache.org/jira/browse/YARN-3547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14514609#comment-14514609

Wangda Tan commented on YARN-3547:

[~xinxianyin], it seems getAllResourceRequests cannot solve the problem, off-switch resource
request will be kept in the requests map even if there's no requests. Instead, you can use
SchedulerApplicationAttempt.getAppResourceUsage.getPending > 0 to check if the app has
"real" requests.

> Apps that have no resource demand should not participate scheduling
> -------------------------------------------------------------------
>                 Key: YARN-3547
>                 URL: https://issues.apache.org/jira/browse/YARN-3547
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>            Reporter: Xianyin Xin
>         Attachments: YARN-3547.001.patch
> At present, all of the 'running' apps participate the scheduling process, however, most
of them may have no resource demand on a production cluster, as the app's status is running
other than waiting for resource at the most of the app's lifetime. It's not a wise way we
sort all the 'running' apps and try to fulfill them, especially on a large-scale cluster which
has heavy scheduling load. 

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