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Lars Hofhansl resolved HBASE-23364. ----------------------------------- Fix Version/s: 1.6.0 2.3.0 3.0.0 Resolution: Fixed Committed to branch-1, branch-2, and master. > HRegionServer sometimes does not shut down. > ------------------------------------------- > > Key: HBASE-23364 > URL: https://issues.apache.org/jira/browse/HBASE-23364 > Project: HBase > Issue Type: Bug > Affects Versions: 3.0.0, 2.3.0, 1.6.0 > Reporter: Lars Hofhansl > Assignee: Lars Hofhansl > Priority: Major > Fix For: 3.0.0, 2.3.0, 1.6.0 > > Attachments: 23364-branch-1.txt > > > Note that I initially assumed this to be a Phoenix bug. But I tracked it down > to HBase. > ---- > I noticed that recently only. Latest build from HBase's branch-1 and latest > build from Phoenix' 4.x-HBase-1.5. I don't know, yet, whether it's a Phoenix > or an HBase issues. > Just filing it here for later reference. > jstack show this thread as the only non-daemon thread: > {code:java} > "pool-11-thread-1" #470 prio=5 os_prio=0 tid=0x0000558a709a4800 nid=0x238e > waiting on condition [0x00007f213ad68000] > java.lang.Thread.State: WAITING (parking) > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <0x000000058eafece8> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) > at > java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) > at > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748){code} > No other information. Somebody created a thread pool somewhere and forgot to > set the threads to daemon or is not shutting down the pool properly. > Edit: I looked for other reference of the locked objects in the stack dump, > but didn't find any. > > -- This message was sent by Atlassian Jira (v8.3.4#803005)