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Posted to yarn-issues@hadoop.apache.org by "Anup Agarwal (Jira)" <ji...@apache.org> on 2021/03/30 17:06:00 UTC
[jira] [Updated] (YARN-10724) Overcounting of preemptions in
CapacityScheduler (LeafQueue metrics)
[ https://issues.apache.org/jira/browse/YARN-10724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anup Agarwal updated YARN-10724:
--------------------------------
Attachment: YARN-10724-trunk.001.patch
> Overcounting of preemptions in CapacityScheduler (LeafQueue metrics)
> --------------------------------------------------------------------
>
> Key: YARN-10724
> URL: https://issues.apache.org/jira/browse/YARN-10724
> Project: Hadoop YARN
> Issue Type: Bug
> Environment: One cause of the over-counting:
> When a container is already running, SchedulerNode does not remove the container immediately from launchedContainer list and waits from the NM to kill the container.
> Both NODE_RESOURCE_UPDATE and NODE_UPDATE invoke signalContainersIfOvercommited (AbstractYarnScheduler) which look for containers to preempt based on the launchedContainers list. Both these calls can create a ContainerPreemptEvent for the same container (as RM is waiting for NM to kill the container). This leads LeafQueue to log metrics for the same preemption multiple times.
> Reporter: Anup Agarwal
> Priority: Minor
> Attachments: YARN-10724-trunk.001.patch
>
>
> Currently CapacityScheduler over-counts preemption metrics inside QueueMetrics.
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