Hi David, you're probably blocked by "producer flow control". Take a look here for more info: http://activemq.apache.org/producer-flow-control.html
Cheers -- Dejan Bosanac - http://twitter.com/dejanb Open Source Integration - http://fusesource.com/ ActiveMQ in Action - http://www.manning.com/snyder/ Blog - http://www.nighttale.net On Fri, Jan 15, 2010 at 10:24 AM, David Delbecq <de...@oma.be> wrote: > Hello, > > can someone explain me why my activeMQ client is stalled in such situation > (i have 10 threads blocked like this having as consequence a complete > blocking of my client application): > > "http-8081-Processor6" daemon prio=10 tid=00841c38 nid=512 lwp_id=2426611 > waiting on condition [236f3000..236f153c] > java.lang.Thread.State: WAITING (parking) > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <40ae1828> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at > java.util.concurrent.locks.LockSupport.park(LockSupport.java:158) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1889) > at > java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:317) > at > org.apache.activemq.transport.FutureResponse.getResult(FutureResponse.java:40) > at > org.apache.activemq.transport.ResponseCorrelator.request(ResponseCorrelator.java:80) > at > org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnection.java:1233) > at > org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1659) > - locked <40ae01e8> (a java.lang.Object) > at > org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:227) > at > org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessageProducerSupport.java:241) > at be.rmi.shark.JMSEventManager.sendEvent(JMSEventManager.java:146) > > > considering that the activeMQ lists size, as referenced by activeMQ admin > interface are as follow: > Name Number Of Pending Messages Number Of Consumers Messages Sent > Messages > Received Views Operations WF.Regraph 0 1 1714 1720 Browse Send > To Purge Delete WF.Notify 0 1 1696 1742 Browse Send To Purge Delete > WF.IncomingEvents > 0 0 0 0 Browse Send To Purge Delete > Is this to be considered normal that i must restart activeMQ producers on a > regular basis because of those this stalling? Where can i find clear > documentation on proper configuration of activeMQ to prevent this stalling? > Thank you. > > -- > David Delbecq > ICT > Institut Royal Météorologique > Ext:557 > >
