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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6144) FairScheduler: preempted resources can become negative
Date Fri, 10 Feb 2017 00:11:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-6144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860445#comment-15860445
] 

Miklos Szegedi commented on YARN-6144:
--------------------------------------

Thank you, [~kasha].

> FairScheduler: preempted resources can become negative
> ------------------------------------------------------
>
>                 Key: YARN-6144
>                 URL: https://issues.apache.org/jira/browse/YARN-6144
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler, resourcemanager
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Miklos Szegedi
>            Assignee: Miklos Szegedi
>            Priority: Blocker
>             Fix For: 2.9.0, 3.0.0-alpha3
>
>         Attachments: Screen Shot 2017-02-02 at 12.49.14 PM.png, YARN-6144.000.patch,
YARN-6144.001.patch, YARN-6144.002.patch, YARN-6144.003.patch
>
>
> {{preemptContainers()}} calls {{trackContainerForPreemption()}} to collect the list of
containers and resources that were preempted for an application. Later the list is reduced
when {{containerCompleted()}} calls {{untrackContainerForPreemption()}}. The bug is that the
resource variable {{preemptedResources}} is subtracted, not just when the container was preempted
but also when it has completed successfully. This causes that we return an incorrect value
in {{getResourceUsage()}}.



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