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Posted to yarn-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2026/05/09 09:02:00 UTC
[jira] [Commented] (YARN-11957) Frequent NM Label Updates Cause Longer RM Failover Time
[ https://issues.apache.org/jira/browse/YARN-11957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18079650#comment-18079650 ]
ASF GitHub Bot commented on YARN-11957:
---------------------------------------
zhangxiping1 opened a new pull request, #8489:
URL: https://github.com/apache/hadoop/pull/8489
### Description of PR
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.
> 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
>
> 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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