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From "Aman Nanner (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1189) java.lang.ClassCastException: org.apache.activemq.ActiveMQConnectionConsumer, when trying to publish to a topic
Date Tue, 06 Mar 2007 19:57:21 GMT
java.lang.ClassCastException: org.apache.activemq.ActiveMQConnectionConsumer, when trying to
publish to a topic
---------------------------------------------------------------------------------------------------------------

                 Key: AMQ-1189
                 URL: https://issues.apache.org/activemq/browse/AMQ-1189
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 4.1.0
         Environment: Windows XP SP2
            Reporter: Aman Nanner
            Priority: Blocker
             Fix For: 4.1.1


When publishing to a topic, a ClassCastException occurs:

----
Caused by: java.lang.ClassCastException: org.apache.activemq.ActiveMQConnectionConsumer
	at org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:810)
	at org.apache.activemq.broker.TransportConnection.dispatchSync(TransportConnection.java:769)
	at org.apache.activemq.broker.region.TopicSubscription.dispatch(TopicSubscription.java:360)
	at org.apache.activemq.broker.region.TopicSubscription.add(TopicSubscription.java:83)
	at org.apache.activemq.broker.region.policy.SimpleDispatchPolicy.dispatch(SimpleDispatchPolicy.java:51)
	at org.apache.activemq.broker.region.Topic.dispatch(Topic.java:417)
	at org.apache.activemq.broker.region.Topic.send(Topic.java:264)
	at org.apache.activemq.broker.region.AbstractRegion.send(AbstractRegion.java:292)
	at org.apache.activemq.broker.region.RegionBroker.send(RegionBroker.java:385)
	at org.apache.activemq.broker.TransactionBroker.send(TransactionBroker.java:193)
	at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:126)
	at org.apache.activemq.broker.CompositeDestinationBroker.send(CompositeDestinationBroker.java:98)
	at org.apache.activemq.broker.MutableBrokerFilter.send(MutableBrokerFilter.java:136)
	at org.apache.activemq.broker.TransportConnection.processMessage(TransportConnection.java:497)
	at org.apache.activemq.command.ActiveMQMessage.visit(ActiveMQMessage.java:604)
	at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:293)
	at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:184)
	at org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:95)
	at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:65)
	at org.apache.activemq.transport.vm.VMTransport.syncOneWay(VMTransport.java:96)
	at org.apache.activemq.transport.vm.VMTransport.oneway(VMTransport.java:83)
	at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:47)
	at org.apache.activemq.transport.ResponseCorrelator.asyncRequest(ResponseCorrelator.java:69)
	at org.apache.activemq.transport.ResponseCorrelator.request(ResponseCorrelator.java:74)
	at org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnection.java:1175)
	... 7 more
----

The problem seems to stem in the processDispatch() method of the org.apache.activemq.broker.TransportConnection
class.  Specifically, it happens during the line:

Runnable sub=(Runnable) md.getConsumer();

It doesn't appear that ActiveMQConnectionConsumer implements the Runnable interface, so this
is why the ClassCastException occurs.

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