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https://issues.apache.org/jira/browse/HDDS-5122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shashikant Banerjee resolved HDDS-5122.
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Fix Version/s: 1.2.0
Resolution: Fixed
> SCM Reinitialization can end up leaking Ratis Segmented RaftLogWorker threads
> -----------------------------------------------------------------------------
>
> Key: HDDS-5122
> URL: https://issues.apache.org/jira/browse/HDDS-5122
> Project: Apache Ozone
> Issue Type: Bug
> Components: SCM HA
> Reporter: István Fajth
> Assignee: Shashikant Banerjee
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.2.0
>
>
> During SCM reinitialialisation, ratis server is spinned up to check if an
> existing ratis group exists or not, and closes the server without starting
> it. In ratis, the segmented raft log worker thraeds are started during init()
> itself but get closed during raftServer.close() only if the server
> transitions to RUNNING state which causes the issue.
>
> {code:java}
> Attaching to process ID 266710, please wait...
> Debugger attached successfully.
> Server compiler detected.
> JVM version is 25.232-b09
> Deadlock Detection:No deadlocks found.Thread 266745: (state = BLOCKED)Locked
> ownable synchronizers:
> - NoneThread 266783: (state = BLOCKED)
> - sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information
> may be imprecise)
> - java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long)
> @bci=20, line=215 (Compiled frame)
> -
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long)
> @bci=78, line=2078 (Compiled frame)
> -
> org.apache.ratis.util.DataBlockingQueue.poll(org.apache.ratis.util.TimeDuration)
> @bci=134, line=137 (Compiled frame)
> - org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogWorker.run()
> @bci=16, line=292 (Interpreted frame)
> -
> org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogWorker$$Lambda$161.run()
> @bci=4 (Interpreted frame)
> - java.lang.Thread.run() @bci=11, line=748 (Interpreted frame)Locked ownable
> synchronizers:
> - NoneThread 266761: (state = BLOCKED)Locked ownable synchronizers:
> - NoneThread 266760: (state = BLOCKED)Locked ownable synchronizers:
> - NoneThread 266759: (state = BLOCKED)
> - java.lang.Object.wait(long) @bci=0 (Interpreted frame)
> - java.lang.ref.ReferenceQueue.remove(long) @bci=59, line=144 (Compiled
> frame)
> - java.lang.ref.ReferenceQueue.remove() @bci=2, line=165 (Compiled frame)
> - java.lang.ref.Finalizer$FinalizerThread.run() @bci=36, line=216
> (Interpreted frame)Locked ownable synchronizers:
> - NoneThread 266758: (state = BLOCKED)
> - java.lang.Object.wait(long) @bci=0 (Interpreted frame)
> - java.lang.Object.wait() @bci=2, line=502 (Compiled frame)
> - java.lang.ref.Reference.tryHandlePending(boolean) @bci=54, line=191
> (Compiled frame)
> - java.lang.ref.Reference$ReferenceHandler.run() @bci=1, line=153
> (Interpreted frame)Locked ownable synchronizers:
> - None
> {code}
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