Hello, We are using ActiveMQ 5.2. Our set up is three broker cluster using multicast discovery. We saw a lot of Async error. For example, in 400 milli-seconds, there were 762 ERROR’s of “Async error occurred: javax.jms.JMSException: Unmatched acknowledege”.
We were sending persistent message (using AMQ persistence), asyn send and auto ack. And we did see message lost when this Exception happened. However, the number of messages lost didn't match with the number of this Exception occurred. What's the cause of this problem? How should we deal with it? This fixed bug (https://issues.apache.org/activemq/browse/AMQ-1976) suggested it related to the consumer memory. Our consumer memory did run and stay high during the course. But there was no OutOfMemory error. Thank you very much. 2008-12-11 10:44:50,833 [50.17.113:48282] ERROR Service - Async error occurred: javax.jms.JMSException: Unmatched acknowledege: MessageAck {commandId = 47577, responseRequired = false, ackType = 2, consumerId = ID:prod-frogger-consumer1.prod.bigfishgames.com-53468-1228955705827-0:0:5:1, firstMessageId = ID:joao-55117-1229021096318-0:17:1:1:3601, lastMessageId = ID:joao-55117-1229021096318-0:17:1:1:3601, destination = queue://com.bigfishgames.dd.service.frogger.queue, transactionId = null, messageCount = 1}; Could not find Message-ID ID:joao-55117-1229021096318-0:17:1:1:3601 in dispatched-list (start of ack) javax.jms.JMSException: Unmatched acknowledege: MessageAck {commandId = 47577, responseRequired = false, ackType = 2, consumerId = ID:prod-frogger-consumer1.prod.bigfishgames.com-53468-1228955705827-0:0:5:1, firstMessageId = ID:joao-55117-1229021096318-0:17:1:1:3601, lastMessageId = ID:joao-55117-1229021096318-0:17:1:1:3601, destination = queue://com.bigfishgames.dd.service.frogger.queue, transactionId = null, messageCount = 1}; Could not find Message-ID ID:joao-55117-1229021096318-0:17:1:1:3601 in dispatched-list (start of ack) at org.apache.activemq.broker.region.PrefetchSubscription.assertAckMatchesDispatched(PrefetchSubscription.java:438) at org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:188) at org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:373) at org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:462) at org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:194) 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:85) at org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:456) at org.apache.activemq.command.MessageAck.visit(MessageAck.java:205) at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:305) at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179) at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68) at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:143) at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:206) at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84) at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:203) at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:185) at java.lang.Thread.run(Thread.java:595) Async error occurred: javax.jms.JMSException: Unmatched acknowledege”. -- View this message in context: http://www.nabble.com/Async-error-occurred%3A-javax.jms.JMSException%3A-Unmatched-acknowledege-tp20986352p20986352.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
