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https://issues.apache.org/jira/browse/YARN-11957?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated YARN-11957:
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    Labels: pull-request-available  (was: )

> Frequent NM Label Updates Cause Longer RM Failover Time
> -------------------------------------------------------
>
>                 Key: YARN-11957
>                 URL: https://issues.apache.org/jira/browse/YARN-11957
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.3.0
>            Reporter: Xiping Zhang
>            Assignee: Xiping Zhang
>            Priority: Major
>              Labels: pull-request-available
>
> In our scenario, the labels of a batch of nodes are updated periodically. 
> After the active RM had been running for a long time, an active-standby 
> switchover was triggered, and the switchover took an unusually long time. By 
> analyzing the logs and jstack information related to the standby RM's 
> transition to active, we found that a core thread, 
> "SchedulerEventDispatcher:Event Processor", had been continuously processing 
> updateNodeLabelsAndQueueResource. The service logs also showed a large number 
> of "REPLACE labels on nodes" messages.



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