xiongjianbo created ZOOKEEPER-4502:
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Summary: SyncRequestProcessor leak when leader election occurred
Key: ZOOKEEPER-4502
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4502
Project: ZooKeeper
Issue Type: Bug
Components: quorum
Affects Versions: 3.6.3
Reporter: xiongjianbo
After a three-node ZooKeeper cluster runs for a period of time, OutOfMemory
occurs. Check the memory stack and find that the number of SyncRequestProcessor
objects is over 400.
!image-2022-03-28-16-18-43-147.png!
Check the previous modification records. It is found that the Learner.shutdown
logic is modified this time.
[https://github.com/apache/zookeeper/pull/1619]
After the modification, the original invoking logic is changed.
Before modification: Learner.shutdown() -> LearnerZooKeeperServer.shutdown() ->
ZooKeeperServer.shutdown()
After modification: Learner.shutdown() -> ZooKeeperServer.shutdown(boolean)
Finally, LearnerZooKeeperServer.syncProcessor.shutdown() was never called.
syncProcessor
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