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Posted to yarn-dev@hadoop.apache.org by "Tao Yang (JIRA)" <ji...@apache.org> on 2019/07/30 11:04:00 UTC

[jira] [Created] (YARN-9714) Memory leaks after RM transitioned to standby

Tao Yang created YARN-9714:
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             Summary: Memory leaks after RM transitioned to standby
                 Key: YARN-9714
                 URL: https://issues.apache.org/jira/browse/YARN-9714
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
            Reporter: Tao Yang
            Assignee: Tao Yang


Recently RM full GC happened in one of our clusters, after investigating the dump memory and jstack, I found two places in RM may cause memory leaks after RM transitioned to standby:
 # Release cache cleanup timer in AbstractYarnScheduler never be canceled.
 # ZooKeeper connection in ZKRMStateStore never be closed.

To solve those leaks, we should close the connection or cancel the timer when services are stopping.



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