[jboss-user] [JBoss Messaging] - ConcurrentModificationException at ChannelSupport.deliverInternal

[Markus Lutum]

Markus Lutum [http://community.jboss.org/people/mclu] created the discussion

"ConcurrentModificationException at ChannelSupport.deliverInternal"

To view the discussion, visit: http://community.jboss.org/message/580205#580205

--------------------------------------------------------------
Hi out there.

We are using Messaging 1.4.5 GA and got twice this error in production at 2 different systems:
Any ideas about the problem? Should we update to 1.4.7? 
It could be that we had a short network issue on that machine but application and database is on the same machine.
Also I whould not expect a concurrentModificationException if this happens. It the network the root cause and what happens with the system if this happend?

THX
Markus

15:36:11,000 WARN  [org.jboss.jms.server.endpoint.ServerSessionEndpoint] No expiry queue has been configured so removing expired
Reference[23298596871307270]:RELIABLE
15:36:11,015 WARN  [org.jboss.jms.server.endpoint.ServerSessionEndpoint] No expiry queue has been configured so removing expired
Reference[23298608005775380]:RELIABLE
15:36:11,015 WARN  [org.jboss.jms.server.endpoint.ServerSessionEndpoint] No expiry queue has been configured so removing expired
Reference[23298608312483861]:RELIABLE

15:36:11,031 ERROR [org.jboss.messaging.core.impl.ChannelSupport] Queue[26556037/1/2-notifications_mediumretry] Failed to deliver
java.util.ConcurrentModificationException
        at java.util.LinkedList$ListItr.checkForComodification(Unknown Source)
        at java.util.LinkedList$ListItr.remove(Unknown Source)
        at
org.jboss.messaging.util.prioritylinkedlist.BasicPriorityLinkedList$PriorityLinkedListIterator.remove(BasicPriorityLinkedList.java:295)
        at
org.jboss.messaging.core.impl.ChannelSupport.deliverInternal(ChannelSupport.java:729)
        at
org.jboss.messaging.core.impl.MessagingQueue.deliverInternal(MessagingQueue.java:506)
        at
org.jboss.messaging.core.impl.ChannelSupport.acknowledgeInternal(ChannelSupport.java:844)
        at
org.jboss.messaging.core.impl.ChannelSupport.acknowledge(ChannelSupport.java:290)
        at
org.jboss.messaging.core.impl.SimpleDelivery.acknowledge(SimpleDelivery.java:103)
        at
org.jboss.jms.server.endpoint.ServerSessionEndpoint.expireDelivery(ServerSessionEndpoint.java:1109)
        at
org.jboss.jms.server.endpoint.ServerConsumerEndpoint.handle(ServerConsumerEndpoint.java:236)
        at
org.jboss.messaging.core.impl.RoundRobinDistributor.handle(RoundRobinDistributor.java:119)
        at
org.jboss.messaging.core.impl.MessagingQueue$DistributorWrapper.handle(MessagingQueue.java:583)
        at
org.jboss.messaging.core.impl.ClusterRoundRobinDistributor.handle(ClusterRoundRobinDistributor.java:79)
        at
org.jboss.messaging.core.impl.ChannelSupport.deliverInternal(ChannelSupport.java:665)
        at
org.jboss.messaging.core.impl.MessagingQueue.deliverInternal(MessagingQueue.java:506)
        at
org.jboss.messaging.core.impl.ChannelSupport.acknowledgeInternal(ChannelSupport.java:844)
        at
org.jboss.messaging.core.impl.ChannelSupport.acknowledge(ChannelSupport.java:290)
        at
org.jboss.messaging.core.impl.SimpleDelivery.acknowledge(SimpleDelivery.java:103)
        at
org.jboss.jms.server.endpoint.ServerSessionEndpoint.expireDelivery(ServerSessionEndpoint.java:1109)
        at
org.jboss.jms.server.endpoint.ServerConsumerEndpoint.handle(ServerConsumerEndpoint.java:236)
        at
org.jboss.messaging.core.impl.RoundRobinDistributor.handle(RoundRobinDistributor.java:119)
        at
org.jboss.messaging.core.impl.MessagingQueue$DistributorWrapper.handle(MessagingQueue.java:583)
        at
org.jboss.messaging.core.impl.ClusterRoundRobinDistributor.handle(ClusterRoundRobinDistributor.java:79)
        at
org.jboss.messaging.core.impl.ChannelSupport.deliverScheduled(ChannelSupport.java:763)
        at
org.jboss.messaging.core.impl.ChannelSupport$DeliverRefTimeoutTarget.timedOut(ChannelSupport.java:1151)
        at
org.jboss.util.timeout.TimeoutFactory$TimeoutWorker.run(TimeoutFactory.java:265)
        at
org.jboss.util.threadpool.RunnableTaskWrapper.run(RunnableTaskWrapper.java:148)
        at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:756)
        at java.lang.Thread.run(Unknown Source)
--------------------------------------------------------------

Reply to this message by going to Community
[http://community.jboss.org/message/580205#580205]

Start a new discussion in JBoss Messaging at Community
[http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2042]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/jboss-user/attachments/20110112/f3418817/attachment-0001.html