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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-6144) Fair share calculation error
Date Fri, 03 Feb 2017 21:50:51 GMT

     [ https://issues.apache.org/jira/browse/YARN-6144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Miklos Szegedi updated YARN-6144:
    Attachment: Screen Shot 2017-02-02 at 12.49.14 PM.png

The bug can cause unrealistic usage reporting like the attached case.

> Fair share calculation error
> ----------------------------
>                 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
>         Attachments: Screen Shot 2017-02-02 at 12.49.14 PM.png
> {{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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