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Posted to yarn-dev@hadoop.apache.org by "Xiping Zhang (Jira)" <ji...@apache.org> on 2026/04/27 02:52:00 UTC

[jira] [Created] (YARN-11957) Frequent NM Label Updates Cause Longer RM Failover Time

Xiping Zhang created YARN-11957:
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             Summary: 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


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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