Hello, Some time ago I faced a deadlock in the connection/failover code in the Artemis client (ver. 2.9.0) under load. Could you please give me any ideas on how to resolve this issue?
The client is a spring application that receives and sends JMS messages to the broker. Here are relevant thread dumps with insignificant parts omitted: The first one is with apparent deadlock. --- Found one Java-level deadlock: ============================= "EventActionMessageContainer-8": waiting to lock monitor 0x00007f0698094228 (object 0x00000006594e8680, a java.lang.Object), which is held by "EventActionMessageContainer-4" "EventActionMessageContainer-4": waiting for ownable synchronizer 0x00000006597cf738, (a java.util.concurrent.locks.ReentrantLock$NonfairSync), which is held by "Thread-0 (ActiveMQ-client-global-threads)" "Thread-0 (ActiveMQ-client-global-threads)": waiting for ownable synchronizer 0x00000006594e8620, (a java.util.concurrent.locks.ReentrantLock$NonfairSync), which is held by "EventActionMessageContainer-4" Java stack information for the threads listed above: =================================================== "EventActionMessageContainer-8": at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:396) - waiting to lock <0x00000006594e8680> (a java.lang.Object) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:358) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.sessionClose(ActiveMQSessionContext.java:619) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.close(ClientSessionImpl.java:1311) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.closeCleanSessions(ClientSessionFactoryImpl.java:445) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.interruptConnectAndCloseAllSessions(ClientSessionFactoryImpl.java:427) - locked <0x00000006597cf718> (a java.lang.Object) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.close(ClientSessionFactoryImpl.java:460) at org.apache.activemq.artemis.jms.client.ActiveMQConnection.close(ActiveMQConnection.java:356) - locked <0x0000000659380dc0> (a org.apache.activemq.artemis.jms.client.ActiveMQConnection) at org.springframework.jms.connection.ConnectionFactoryUtils.releaseConnection(ConnectionFactoryUtils.java:80) at org.springframework.jms.listener.AbstractJmsListeningContainer.refreshSharedConnection(AbstractJmsListeningContainer.java:395) - locked <0x00000006593a0b28> (a java.lang.Object) at org.springframework.jms.listener.DefaultMessageListenerContainer.refreshConnectionUntilSuccessful(DefaultMessageListenerContainer.java:925) at org.springframework.jms.listener.DefaultMessageListenerContainer.recoverAfterListenerSetupFailure(DefaultMessageListenerContainer.java:899) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1077) - locked <0x0000000659659158> (a java.lang.Object) at java.lang.Thread.run(Thread.java:748) "EventActionMessageContainer-4": at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000006597cf738> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:837) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:872) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1202) at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:213) at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.lockFailover(ClientSessionFactoryImpl.java:233) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.failoverOrReconnect(ClientSessionFactoryImpl.java:543) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:507) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.access$600(ClientSessionFactoryImpl.java:73) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl$DelegatingFailureListener.connectionFailed(ClientSessionFactoryImpl.java:1222) at org.apache.activemq.artemis.spi.core.protocol.AbstractRemotingConnection.callFailureListeners(AbstractRemotingConnection.java:75) at org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.fail(RemotingConnectionImpl.java:219) at org.apache.activemq.artemis.spi.core.protocol.AbstractRemotingConnection.fail(AbstractRemotingConnection.java:218) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:455) - locked <0x00000006594e8680> (a java.lang.Object) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:358) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.createConsumer(ActiveMQSessionContext.java:394) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.internalCreateConsumer(ClientSessionImpl.java:1963) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.createConsumer(ClientSessionImpl.java:859) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.createConsumer(ClientSessionImpl.java:807) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createClientConsumer(ActiveMQSession.java:921) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createConsumer(ActiveMQSession.java:816) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createConsumer(ActiveMQSession.java:462) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createConsumer(ActiveMQSession.java:440) at org.springframework.jms.listener.AbstractMessageListenerContainer.createConsumer(AbstractMessageListenerContainer.java:881) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.createListenerConsumer(AbstractPollingMessageListenerContainer.java:215) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:299) at core.server.jms.BackGroundClusterNodeListenerContainer.doReceiveAndExecute(BackGroundClusterNodeListenerContainer.java:80) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:255) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1166) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1158) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1055) at java.lang.Thread.run(Thread.java:748) "Thread-0 (ActiveMQ-client-global-threads)": at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000006594e8620> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:837) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:872) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1202) at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:213) at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.lock(ChannelImpl.java:603) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.lockCommunications(ActiveMQSessionContext.java:255) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.preHandleFailover(ClientSessionImpl.java:1348) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.reconnectSessions(ClientSessionFactoryImpl.java:744) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.failoverOrReconnect(ClientSessionFactoryImpl.java:617) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:507) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:500) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.access$100(ClientSessionFactoryImpl.java:73) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl$1.run(ClientSessionFactoryImpl.java:363) at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:42) at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:31) at org.apache.activemq.artemis.utils.actors.ProcessorBase.executePendingTasks(ProcessorBase.java:66) at org.apache.activemq.artemis.utils.actors.ProcessorBase$$Lambda$420/42633625.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.activemq.artemis.utils.ActiveMQThreadFactory$1.run(ActiveMQThreadFactory.java:118) Found 1 deadlock. --- Another one with no obvious deadlock (due to the asynchronous nature of the client), but stuck nonetheless. --- "ExecScriptAction #27" #27 daemon prio=5 os_prio=0 tid=0x00007fb468725000 nid=0x7f0c0 in Object.wait() [0x00007fb3d77a2000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at io.netty.util.concurrent.DefaultPromise.awaitUninterruptibly(DefaultPromise.java:243) - locked <0x00000007930f3268> (a io.netty.bootstrap.AbstractBootstrap$PendingRegistrationPromise) at io.netty.channel.DefaultChannelPromise.awaitUninterruptibly(DefaultChannelPromise.java:137) at io.netty.channel.DefaultChannelPromise.awaitUninterruptibly(DefaultChannelPromise.java:30) at org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector.createConnection(NettyConnector.java:778) at org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector.createConnection(NettyConnector.java:740) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.openTransportConnection(ClientSessionFactoryImpl.java:1051) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.createTransportConnection(ClientSessionFactoryImpl.java:1100) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.establishNewConnection(ClientSessionFactoryImpl.java:1311) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.getConnection(ClientSessionFactoryImpl.java:906) - locked <0x00000007930ef8e0> (a java.lang.Object) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.getConnectionWithRetry(ClientSessionFactoryImpl.java:802) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.connect(ClientSessionFactoryImpl.java:241) at org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:780) - locked <0x000000064aa73d58> (a org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl) at org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory.createConnectionInternal(ActiveMQConnectionFactory.java:844) - locked <0x000000064aa73d20> (a org.apache.activemq.artemis.jms.client.ActiveMQJMSConnectionFactory) at org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory.createConnection(ActiveMQConnectionFactory.java:282) at org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory.createConnection(ActiveMQConnectionFactory.java:277) at org.springframework.jms.support.JmsAccessor.createConnection(JmsAccessor.java:180) at org.springframework.jms.core.JmsTemplate.access$600(JmsTemplate.java:90) at org.springframework.jms.core.JmsTemplate$JmsTemplateResourceFactory.createConnection(JmsTemplate.java:1177) at org.springframework.jms.connection.ConnectionFactoryUtils.doGetTransactionalSession(ConnectionFactoryUtils.java:312) at org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:471) at org.springframework.jms.core.JmsTemplate.send(JmsTemplate.java:570) ... Locked ownable synchronizers: - <0x0000000793657308> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) - <0x0000000793665888> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) - <0x00000006400b51e0> (a java.util.concurrent.ThreadPoolExecutor$Worker) "EventActionMessageContainer-7" #275 prio=5 os_prio=0 tid=0x00007fb394a0d800 nid=0x7fbac waiting for monitor entry [0x00007fb33a4b9000] java.lang.Thread.State: BLOCKED (on object monitor) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:397) - waiting to lock <0x000000065cd70a80> (a java.lang.Object) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:358) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.sessionClose(ActiveMQSessionContext.java:619) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.close(ClientSessionImpl.java:1311) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.closeCleanSessions(ClientSessionFactoryImpl.java:445) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.interruptConnectAndCloseAllSessions(ClientSessionFactoryImpl.java:427) - locked <0x000000065ced93d8> (a java.lang.Object) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.close(ClientSessionFactoryImpl.java:460) at org.apache.activemq.artemis.jms.client.ActiveMQConnection.close(ActiveMQConnection.java:356) - locked <0x000000065c838aa8> (a org.apache.activemq.artemis.jms.client.ActiveMQConnection) at org.springframework.jms.connection.ConnectionFactoryUtils.releaseConnection(ConnectionFactoryUtils.java:80) at org.springframework.jms.listener.AbstractJmsListeningContainer.refreshSharedConnection(AbstractJmsListeningContainer.java:395) - locked <0x000000065c8f32b8> (a java.lang.Object) at org.springframework.jms.listener.DefaultMessageListenerContainer.refreshConnectionUntilSuccessful(DefaultMessageListenerContainer.java:925) at org.springframework.jms.listener.DefaultMessageListenerContainer.recoverAfterListenerSetupFailure(DefaultMessageListenerContainer.java:899) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1077) - locked <0x000000065c8f4610> (a java.lang.Object) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - None "Reports (Complete)-1" #292 prio=5 os_prio=0 tid=0x00007fb395a68000 nid=0x7fbd3 waiting for monitor entry [0x00007fb3392a6000] java.lang.Thread.State: BLOCKED (on object monitor) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:396) - waiting to lock <0x0000000794a5c028> (a java.lang.Object) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:358) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.sessionStop(ActiveMQSessionContext.java:473) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.stop(ClientSessionImpl.java:1096) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.stop(ClientSessionImpl.java:1085) at org.apache.activemq.artemis.jms.client.ActiveMQSession.stop(ActiveMQSession.java:1214) at org.apache.activemq.artemis.jms.client.ActiveMQConnection.stop(ActiveMQConnection.java:341) - locked <0x000000065d080678> (a org.apache.activemq.artemis.jms.client.ActiveMQConnection) at org.springframework.jms.connection.SingleConnectionFactory$SharedConnectionInvocationHandler.localStop(SingleConnectionFactory.java:644) - locked <0x0000000794a61f20> (a java.lang.Object) at org.springframework.jms.connection.SingleConnectionFactory$SharedConnectionInvocationHandler.invoke(SingleConnectionFactory.java:577) at com.sun.proxy.$Proxy311.close(Unknown Source) at org.springframework.jms.connection.ConnectionFactoryUtils.releaseConnection(ConnectionFactoryUtils.java:80) at org.springframework.jms.connection.JmsResourceHolder.closeAll(JmsResourceHolder.java:232) at org.springframework.jms.connection.ConnectionFactoryUtils$JmsResourceSynchronization.releaseResource(ConnectionFactoryUtils.java:430) at org.springframework.jms.connection.ConnectionFactoryUtils$JmsResourceSynchronization.releaseResource(ConnectionFactoryUtils.java:404) at org.springframework.transaction.support.ResourceHolderSynchronization.beforeCompletion(ResourceHolderSynchronization.java:77) at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCompletion(TransactionSynchronizationUtils.java:106) at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCompletion(AbstractPlatformTransactionManager.java:945) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:745) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:249) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1166) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1158) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1055) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - None "EventActionMessageContainer-8" #276 prio=5 os_prio=0 tid=0x00007fb394a0f000 nid=0x7fbad in Object.wait() [0x00007fb33a3b7000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at io.netty.util.concurrent.DefaultPromise.awaitUninterruptibly(DefaultPromise.java:243) - locked <0x0000000794af23a0> (a io.netty.channel.group.DefaultChannelGroupFuture) at io.netty.channel.group.DefaultChannelGroupFuture.awaitUninterruptibly(DefaultChannelGroupFuture.java:183) at io.netty.channel.group.DefaultChannelGroupFuture.awaitUninterruptibly(DefaultChannelGroupFuture.java:40) at org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector.close(NettyConnector.java:718) - locked <0x000000065c8b5678> (a org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.failoverOrReconnect(ClientSessionFactoryImpl.java:607) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:507) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.access$600(ClientSessionFactoryImpl.java:73) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl$DelegatingFailureListener.connectionFailed(ClientSessionFactoryImpl.java:1222) at org.apache.activemq.artemis.spi.core.protocol.AbstractRemotingConnection.callFailureListeners(AbstractRemotingConnection.java:75) at org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.fail(RemotingConnectionImpl.java:219) at org.apache.activemq.artemis.spi.core.protocol.AbstractRemotingConnection.fail(AbstractRemotingConnection.java:218) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:455) - locked <0x000000065cd70a80> (a java.lang.Object) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:358) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.closeConsumer(ActiveMQSessionContext.java:433) at org.apache.activemq.artemis.core.client.impl.ClientConsumerImpl.doCleanUp(ClientConsumerImpl.java:1113) at org.apache.activemq.artemis.core.client.impl.ClientConsumerImpl.close(ClientConsumerImpl.java:462) at org.apache.activemq.artemis.jms.client.ActiveMQMessageConsumer.close(ActiveMQMessageConsumer.java:145) at org.springframework.jms.support.JmsUtils.closeMessageConsumer(JmsUtils.java:151) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:356) at core.server.jms.BackGroundClusterNodeListenerContainer.doReceiveAndExecute(BackGroundClusterNodeListenerContainer.java:80) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:255) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1166) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1158) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1055) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - <0x000000065cd70a20> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) - <0x000000065ced93f8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) "Reports (Complete)-3" #294 prio=5 os_prio=0 tid=0x00007fb395a6b000 nid=0x7fbd5 in Object.wait() [0x00007fb3390a4000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at io.netty.util.concurrent.DefaultPromise.awaitUninterruptibly(DefaultPromise.java:243) - locked <0x0000000796e9a460> (a io.netty.channel.group.DefaultChannelGroupFuture) at io.netty.channel.group.DefaultChannelGroupFuture.awaitUninterruptibly(DefaultChannelGroupFuture.java:183) at io.netty.channel.group.DefaultChannelGroupFuture.awaitUninterruptibly(DefaultChannelGroupFuture.java:40) at org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector.close(NettyConnector.java:718) - locked <0x000000065d080e98> (a org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.failoverOrReconnect(ClientSessionFactoryImpl.java:607) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:507) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.access$600(ClientSessionFactoryImpl.java:73) at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl$DelegatingFailureListener.connectionFailed(ClientSessionFactoryImpl.java:1222) at org.apache.activemq.artemis.spi.core.protocol.AbstractRemotingConnection.callFailureListeners(AbstractRemotingConnection.java:75) at org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.fail(RemotingConnectionImpl.java:219) at org.apache.activemq.artemis.spi.core.protocol.AbstractRemotingConnection.fail(AbstractRemotingConnection.java:218) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:455) - locked <0x0000000794a5c028> (a java.lang.Object) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:358) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.closeConsumer(ActiveMQSessionContext.java:433) at org.apache.activemq.artemis.core.client.impl.ClientConsumerImpl.doCleanUp(ClientConsumerImpl.java:1113) at org.apache.activemq.artemis.core.client.impl.ClientConsumerImpl.close(ClientConsumerImpl.java:462) at org.apache.activemq.artemis.jms.client.ActiveMQMessageConsumer.close(ActiveMQMessageConsumer.java:145) at org.springframework.jms.support.JmsUtils.closeMessageConsumer(JmsUtils.java:151) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:356) at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:235) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1166) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1158) at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:1055) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - <0x0000000794a5bfc8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) - <0x000000065d0cf390> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) --- Now about configuration. Message sending is done via JmsTemplates. They're configured like this: --- final JmsTemplate jmsTemplate = new JmsTemplate(connectionFactory); jmsTemplate.setSessionTransacted(true); jmsTemplate.setSessionAcknowledgeMode(Session.AUTO_ACKNOWLEDGE); jmsTemplate.setExplicitQosEnabled(true); jmsTemplate.setPriority(Jms.DEFAULT_PRIORITY); jmsTemplate.setReceiveTimeout(1000); --- Message receiving is implemented with multiple ListenerContainers. One group of containers configured like that: --- DefaultMessageListenerContainer container = new BackGroundClusterNodeListenerContainer(args); container.setConnectionFactory(connectionFactory); container.setCacheLevel(2); container.setReceiveTimeout(1500); container.setDestinationName(destinationName); container.setConcurrency("8-8"); container.setBeanName(containerID); container.setAutoStartup(true); container.setMessageListener(messageListener); container.setSessionTransacted(false); container.setSessionAcknowledgeMode(AUTO_ACKNOWLEDGE); --- Another one is like that: --- DefaultMessageListenerContainer container = new DefaultMessageListenerContainer(); container.setDestinationName(destinationName); container.setConnectionFactory(connectionFactory); container.setConcurrentConsumers(3) container.setSessionAcknowledgeMode(101) container.setCacheLevel(modules.reportBuilderHelper.MESSAGE_LISTENER_CACHE_LEVEL) container.setExceptionListener(t -> { Throwable rootCause = ExceptionUtils.getRootCause(t); LOG.error("An error occured in listener for " + destination, rootCause); }); container.afterPropertiesSet(); container.start(); --- Connection factory for the first two cases is created like that: --- final Map<String, Object> nettyParams = new HashMap<>(2); nettyParams.put("host", host); nettyParams.put("port", port); nettyParams.put(TransportConstants.NETTY_CONNECT_TIMEOUT, 60000); nettyParams.put(TransportConstants.REMOTING_THREADS_PROPNAME, 4); ActiveMQConnectionFactory connectionFactory = ActiveMQJMSClient.createConnectionFactoryWithoutHA(JMSFactoryType.CF, new TransportConfiguration(NettyConnectorFactory.class.getName(), nettyParams)) --- Connection factory for the last case is created like that (Groovy code): --- def nettyParams = ["host" : host, "port" : port]; def connectionFactory = ActiveMQJMSClient.createConnectionFactoryWithoutHA(JMSFactoryType.CF, new TransportConfiguration(NettyConnectorFactory.class.getName(), nettyParams)); def serverLocator = connectionFactory.getServerLocator() serverLocator.setConnectionTTL(-1) serverLocator.setReconnectAttempts(-1) serverLocator.setRetryInterval(1000) serverLocator.setRetryIntervalMultiplier(1) --- BackGroundClusterNodeListenerContainer - is an extension of a DefaultMessageListenerContainer with overridden doReceiveAndExecute. The overridden method does some quick checks and returns false if they don't hold, otherwise delegates to the super. Both a client and a broker are on the same laptop. Any chance there is something I can do to overcome it? -- Oleg Kleshchev