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https://issues.apache.org/activemq/browse/AMQ-2144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gary Tully resolved AMQ-2144.
-----------------------------
Resolution: Fixed
Fix Version/s: 5.3.0
r753297 - patch applied with thanks.
> Can't unsubscribe a durable subscription when there's a virtual topic present
> on the broker
> -------------------------------------------------------------------------------------------
>
> Key: AMQ-2144
> URL: https://issues.apache.org/activemq/browse/AMQ-2144
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.2.0
> Environment: Ubuntu
> Reporter: Cláudio de Miranda Luz
> Assignee: Gary Tully
> Fix For: 5.3.0
>
> Attachments: AMQ-2144.txt
>
>
> The scenario is:
> There's a virtual topic being used. (i.e. topic VirtualTopic.Orders).
> A consumer subscribes to any topic present on the broker and after some time
> it tries to unsubscribe the durable subscription.
> When it calls session.unsubscribe(consumerName) to unsubscribe a durable
> subscription, it receives the following exception:
> Caught: javax.jms.JMSException:
> org.apache.activemq.broker.region.virtual.VirtualTopicInterceptor cannot be
> cast to org.apache.activemq.broker.region.Topic
> javax.jms.JMSException:
> org.apache.activemq.broker.region.virtual.VirtualTopicInterceptor cannot be
> cast to org.apache.activemq.broker.region.Topic
> at
> org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:49)
> at
> org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnection.java:1244)
> at
> org.apache.activemq.ActiveMQConnection.unsubscribe(ActiveMQConnection.java:2052)
> at
> org.apache.activemq.ActiveMQSession.unsubscribe(ActiveMQSession.java:1431)
> at DurableSubscriber.consumeMessagesAndClose(DurableSubscriber.java:206)
> at DurableSubscriber.run(DurableSubscriber.java:112)
> at DurableSubscriber.main(DurableSubscriber.java:70)
> Caused by: java.lang.ClassCastException:
> org.apache.activemq.broker.region.virtual.VirtualTopicInterceptor cannot be
> cast to org.apache.activemq.broker.region.Topic
> at
> org.apache.activemq.broker.region.TopicRegion.removeSubscription(TopicRegion.java:139)
> at
> org.apache.activemq.broker.region.RegionBroker.removeSubscription(RegionBroker.java:409)
> at
> org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:98)
> at
> org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:98)
> at
> org.apache.activemq.broker.BrokerFilter.removeSubscription(BrokerFilter.java:98)
> at
> org.apache.activemq.broker.MutableBrokerFilter.removeSubscription(MutableBrokerFilter.java:105)
> at
> org.apache.activemq.broker.TransportConnection.processRemoveSubscription(TransportConnection.java:339)
> at
> org.apache.activemq.command.RemoveSubscriptionInfo.visit(RemoveSubscriptionInfo.java:83)
> 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:619)
> The error happens on the following method of
> org.apache.activemq.broker.region.TopicRegion class:
> public void removeSubscription(ConnectionContext context,
> RemoveSubscriptionInfo info) throws Exception {
> SubscriptionKey key = new SubscriptionKey(info.getClientId(),
> info.getSubscriptionName());
> DurableTopicSubscription sub = durableSubscriptions.get(key);
> if (sub == null) {
> throw new InvalidDestinationException("No durable subscription
> exists for: " + info.getSubscriptionName());
> }
> if (sub.isActive()) {
> throw new JMSException("Durable consumer is in use");
> }
> durableSubscriptions.remove(key);
> synchronized (destinationsMutex) {
> for (Iterator<Destination> iter =
> destinations.values().iterator(); iter.hasNext();) {
> Topic topic = (Topic)iter.next();
> topic.deleteSubscription(context, key);
> }
> }
> super.removeConsumer(context, sub.getConsumerInfo());
> }
> The virtual topic is present on the destinations collection being iterated
> but its type is not Topic and that is what causes the error.
> If there is no virtual topics present on the broker, unsubscriptions work
> well.
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