mattrpav opened a new issue, #1747:
URL: https://github.com/apache/activemq/issues/1747
Version: v5.19.2 (w/ recent KahaDB updates)
Notes: this only occurs when useCache=true. When disabled, there is no
deadlock.
Producer thread:
```
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x000000078b900220> (a
org.apache.activemq.store.kahadb.KahaDBStore$StoreQueueTask$InnerFutureTask)
at
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:221)
at
java.util.concurrent.FutureTask.awaitDone([email protected]/FutureTask.java:500)
at
java.util.concurrent.FutureTask.get([email protected]/FutureTask.java:190)
at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.waitForAsyncMessage(AbstractStoreCursor.java:575)
at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.syncWithStore(AbstractStoreCursor.java:337)
at
org.apache.activemq.broker.region.cursors.AbstractStoreCursor.tryAddMessageLast(AbstractStoreCursor.java:269)
- locked <0x000000078b900260> (a
org.apache.activemq.broker.region.cursors.QueueStorePrefetch)
at
org.apache.activemq.broker.region.cursors.AbstractPendingMessageCursor.addMessageLast(AbstractPendingMessageCursor.java:93)
at
org.apache.activemq.broker.region.cursors.StoreQueueCursor.tryAddMessageLast(StoreQueueCursor.java:105)
- locked <0x000000078b900398> (a
org.apache.activemq.broker.region.cursors.StoreQueueCursor)
at
org.apache.activemq.broker.region.cursors.AbstractPendingMessageCursor.addMessageLast(AbstractPendingMessageCursor.java:93)
at
org.apache.activemq.broker.region.Queue.doPendingCursorAdditions(Queue.java:827)
at
org.apache.activemq.broker.region.Queue.tryOrderedCursorAdd(Queue.java:938)
at org.apache.activemq.broker.region.Queue.doMessageSend(Queue.java:917)
at org.apache.activemq.broker.region.Queue.send(Queue.java:767)
...
Locked ownable synchronizers:
- ...
- ...
- <0x00000007bf78a970> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
```
ConcurrentQueueStoreAndDispatch thread:
```
"ConcurrentQueueStoreAndDispatch" #657 [122627] daemon prio=8 os_prio=31
cpu=890.98ms elapsed=815.63s tid=0x000000014d982600 nid=122627 waiting on
condition [0x000000035faca000]
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x00000007bf78a970> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
at
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:221)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:754)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:990)
at
java.util.concurrent.locks.ReentrantLock$Sync.lock([email protected]/ReentrantLock.java:153)
at
java.util.concurrent.locks.ReentrantLock.lock([email protected]/ReentrantLock.java:322)
at
org.apache.activemq.store.kahadb.MessageDatabase.process(MessageDatabase.java:1264)
at
org.apache.activemq.store.kahadb.MessageDatabase$6.visit(MessageDatabase.java:1198)
at
org.apache.activemq.store.kahadb.data.KahaAddMessageCommand.visit(KahaAddMessageCommand.java:241)
at
org.apache.activemq.store.kahadb.MessageDatabase.process(MessageDatabase.java:1195)
at
org.apache.activemq.store.kahadb.MessageDatabase.store(MessageDatabase.java:1089)
at
org.apache.activemq.store.kahadb.MessageDatabase.store(MessageDatabase.java:1065)
at
org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore.addMessage(KahaDBStore.java:537)
at
org.apache.activemq.store.kahadb.KahaDBStore$StoreQueueTask.run(KahaDBStore.java:1669)
at
java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1144)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:642)
at java.lang.Thread.runWith([email protected]/Thread.java:1596)
at java.lang.Thread.run([email protected]/Thread.java:1583)
Locked ownable synchronizers:
- <0x00000007bf614ef0> (a
java.util.concurrent.ThreadPoolExecutor$Worker)
```
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