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Posted to yarn-issues@hadoop.apache.org by "Tao Yang (JIRA)" <ji...@apache.org> on 2018/06/20 12:38:00 UTC

[jira] [Updated] (YARN-8443) Cluster metrics have wrong Total VCores when there is reserved container for CapacityScheduler

     [ https://issues.apache.org/jira/browse/YARN-8443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tao Yang updated YARN-8443:
---------------------------
    Attachment: YARN-8443.001.patch

> Cluster metrics have wrong Total VCores when there is reserved container for CapacityScheduler
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-8443
>                 URL: https://issues.apache.org/jira/browse/YARN-8443
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: webapp
>    Affects Versions: 2.9.0, 3.1.0, 3.2.0
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Major
>         Attachments: YARN-8443.001.patch
>
>
> Cluster metrics on the web UI will give wrong Total Vcores when there is reserved container for CapacityScheduler.
> Reference code:
> {code:java|title=ClusterMetricsInfo.java}
>     if (rs instanceof CapacityScheduler) {
>       CapacityScheduler cs = (CapacityScheduler) rs;
>       this.totalMB = availableMB + allocatedMB + reservedMB;
>       this.totalVirtualCores =
>           availableVirtualCores + allocatedVirtualCores + containersReserved;
>        ...
>     }
> {code}
> The key of this problem is the calculation of totalVirtualCores, {{containersReserved}} is the number of reserved containers, not reserved VCores. The correct calculation should be {{this.totalVirtualCores = availableVirtualCores + allocatedVirtualCores + reservedVirtualCores;}}



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