Hi, we are developing out project from 3 different eclipse projects. One is utils project which expose common.jar file. This file has simple interface that implements Serializable and class which implement : public interface PublishCommand extends Serializable { | // some methods | } | | public class PublishBaseCommand implements PublishCommand { | | private String operationType; | | public PublishBaseCommand() { | } | // some get/set methods | } This will be class which will be sanded into queue1. Also, there is second project - Web application (on Spring) which instantiate upper class and send it to queue1. Deploy file is .war, and it contain common.jar in it's WEB-INF/lib path. Code for sending message: try { | jmsDistributionTemplate.send(new MessageCreator() { | public Message createMessage(Session session) throws JMSException { | ObjectMessage oMessage = session.createObjectMessage(); | oMessage.setObject(new PublishBaseCommand() ); | return oMessage; | } | }); | } | catch(JmsException e) { | // ... | } | Third application is also Web application (also on Spring). This application contains listener: public void onMessage(Message message) { | if (message instanceof ObjectMessage) { | try { | ObjectMessage objectMessage = (ObjectMessage)message; | log.info("MSG === " + objectMessage.getObject()); | log.info("MSG HASH === " + objectMessage.getObject().getClass().hashCode()); | log.info("NED HASH === " + PublishBaseCommand.class.hashCode()); | PublishBaseCommand= (PublishBaseCommand)objectMessage.getObject(); | } | catch(JMSException e) { | // ... | } | } | } main problem is in thrid application - in part where we call getObject and convert it to PublishBaseCommand - we got ClassCastException: [Thread-22] listener.SimpleMessageListenerContainer (AbstractMessageListenerContainer.java:634) - Execution of JMS message listener failed | java.lang.ClassCastException: publishing.service.impl.PublishBaseCommand | at updater.service.impl.PublishListenerImpl.onMessage(PublishListenerImpl.java:33) | at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:531) | at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:466) | at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:435) | at org.springframework.jms.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:407) | at org.springframework.jms.listener.SimpleMessageListenerContainer.processMessage(SimpleMessageListenerContainer.java:290) | at org.springframework.jms.listener.SimpleMessageListenerContainer$2.onMessage(SimpleMessageListenerContainer.java:266) | at org.jboss.jms.client.remoting.MessageCallbackHandler.callOnMessage(MessageCallbackHandler.java:153) | at org.jboss.jms.client.remoting.MessageCallbackHandler$ListenerRunner.run(MessageCallbackHandler.java:884) | at EDU.oswego.cs.dl.util.concurrent.QueuedExecutor$RunLoop.run(QueuedExecutor.java:89) | at java.lang.Thread.run(Unknown Source) Also following output is traced from upper log.info: MSG === publishing.service.impl.PublishBaseCommand@126cb1a | MSG HASH === 13712958 | NEED HASH === 13628909 P.S. I removed most of the code for readability. Thanks, Zaharije Pasalic View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4184968#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...