If it can help, it happens when a consumer start sending a pretty high volume of messages (~100k) back into the beginning of a pipelined system, i.e there is recursion of still uncommitted transaction.
Cheers Francesco rajdavies wrote: > > I've created a jira issue for this: http://issues.apache.org/ > activemq/browse/AMQ-1108 > > cheers, > > Rob > On 23 Dec 2006, at 10:44, drvillo wrote: > >> Found one Java-level deadlock: >> ============================= >> "ActiveMQ Task": >> waiting to lock monitor 0x080e4f3c (object 0x92b60db0, a >> java.util.LinkedList), >> which is held by "ActiveMQ Transport: tcp:///127.0.0.1:37496" >> "ActiveMQ Transport: tcp:///127.0.0.1:37496": >> waiting to lock monitor 0x080e4f7c (object 0x92b60d98, a >> org.apache.activemq.broker.region.cursors.VMPendingMessageCursor), >> which is held by "ActiveMQ Task" >> >> Java stack information for the threads listed above: >> =================================================== >> "ActiveMQ Task": >> at >> org.apache.activemq.broker.region.PrefetchSubscription.dispatch >> (PrefetchSubscription.java:414) >> - waiting to lock <0x92b60db0> (a java.util.LinkedList) >> at >> org.apache.activemq.broker.region.QueueSubscription.dispatch >> (QueueSubscription.java:172) >> at >> org.apache.activemq.broker.region.PrefetchSubscription.dispatchMatched >> (PrefetchSubscription.java:397) >> - locked <0x92b60d98> (a >> org.apache.activemq.broker.region.cursors.VMPendingMessageCursor) >> at >> org.apache.activemq.broker.region.PrefetchSubscription.onDispatch >> (PrefetchSubscription.java:451) >> at >> org.apache.activemq.broker.region.QueueSubscription.onDispatch >> (QueueSubscription.java:192) >> at >> org.apache.activemq.broker.region.PrefetchSubscription$3.run >> (PrefetchSubscription.java:429) >> at >> org.apache.activemq.broker.TransportConnection.processDispatch >> (TransportConnection.java:778) >> at >> org.apache.activemq.broker.TransportConnection.iterate >> (TransportConnection.java:791) >> at >> org.apache.activemq.thread.PooledTaskRunner.runTask >> (PooledTaskRunner.java:111) >> at >> org.apache.activemq.thread.PooledTaskRunner.access$100 >> (PooledTaskRunner.java:26) >> at >> org.apache.activemq.thread.PooledTaskRunner$1.run >> (PooledTaskRunner.java:44) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.runTask >> (ThreadPoolExecutor.java:650) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.run >> (ThreadPoolExecutor.java:675) >> at java.lang.Thread.run(Thread.java:595) >> "ActiveMQ Transport: tcp:///127.0.0.1:37496": >> at >> org.apache.activemq.broker.region.PrefetchSubscription.dispatchMatched >> (PrefetchSubscription.java:383) >> - waiting to lock <0x92b60d98> (a >> org.apache.activemq.broker.region.cursors.VMPendingMessageCursor) >> at >> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge >> (PrefetchSubscription.java:219) >> - locked <0x92b60db0> (a java.util.LinkedList) >> at >> org.apache.activemq.broker.region.AbstractRegion.acknowledge >> (AbstractRegion.java:299) >> at >> org.apache.activemq.broker.region.RegionBroker.acknowledge >> (RegionBroker.java:397) >> at >> org.apache.activemq.broker.TransactionBroker.acknowledge >> (TransactionBroker.java:177) >> at >> org.apache.activemq.broker.BrokerFilter.acknowledge >> (BrokerFilter.java:74) >> at >> org.apache.activemq.broker.BrokerFilter.acknowledge >> (BrokerFilter.java:74) >> at >> org.apache.activemq.broker.MutableBrokerFilter.acknowledge >> (MutableBrokerFilter.java:88) >> at >> org.apache.activemq.broker.TransportConnection.processMessageAck >> (TransportConnection.java:491) >> at org.apache.activemq.command.MessageAck.visit >> (MessageAck.java:179) >> at >> org.apache.activemq.broker.TransportConnection.service >> (TransportConnection.java:287) >> at >> org.apache.activemq.broker.TransportConnection$1.onCommand >> (TransportConnection.java:178) >> at >> org.apache.activemq.transport.TransportFilter.onCommand >> (TransportFilter.java:65) >> at >> org.apache.activemq.transport.WireFormatNegotiator.onCommand >> (WireFormatNegotiator.java:133) >> at >> org.apache.activemq.transport.InactivityMonitor.onCommand >> (InactivityMonitor.java:122) >> at >> org.apache.activemq.transport.TransportSupport.doConsume >> (TransportSupport.java:84) >> at >> org.apache.activemq.transport.tcp.TcpTransport.run >> (TcpTransport.java:137) >> at java.lang.Thread.run(Thread.java:595) >> >> Found 1 deadlock. >> > > > -- View this message in context: http://www.nabble.com/Another-deadlock-showing-up-tf2874106.html#a8035799 Sent from the ActiveMQ - User mailing list archive at Nabble.com.
