Works in 3.0.2. 3.2.1 MessageFormatException: Object cannot

[andrewboyd]

I'm getting the following exception in 3.2.1:
javax.jms.MessageFormatException: Object cannot be serialized
at org.jboss.mq.SpyObjectMessage.setObject(SpyObjectMessage.java:67)
at org.jboss.mq.SpySession.createObjectMessage(SpySession.java:245)
at com.unetworks.psa.dataminer.DMAsyncPublisher.publishMessage(DMAsyncPublisher.java:47)

Source for DMAsyncPublisher:
public void publishMessage(DMAsyncCommandMessage msg){
try{
svLocator_ = ServiceLocator.getInstance();
} catch(ServiceLocatorException e){
e.printStackTrace();
}
try{
// Lookup the managed connection factory for a topic
QueueConnectionFactory queueFactory = svLocator_.getDataminerQueueConnectionFactory();

// Create a connection to the JMS provider
QueueConnection queueConnection = queueFactory.createQueueConnection("admin", "unetworks");
queueConnection.start();

// Create a topic session
QueueSession session = queueConnection.createQueueSession(true, Session.AUTO_ACKNOWLEDGE);

// Lookup the destination you want to send to
Queue queue = svLocator_.getDataminerQueue();

// Create a sender
QueueSender queueSender = session.createSender(queue);

// Create a message
ObjectMessage message = session.createObjectMessage(msg);

// Send the message
queueSender.send(queue, message); <<< line 47

Source for DMAsyncCommandMessage:
*/
public interface DMAsyncCommandMessage extends Serializable{
void execute(DMAsyncHandlerMDB dmAsyncHandlerMDB);
...
Source for implementing class:
public class DMUrlConceptCommandMessage implements DMAsyncCommandMessage, Serializable{
private DMUrlConceptMap payload_;
private SearchResultLineItemList lineItems_;

The messages are clearly marked as Serializable and it worked fine in 3.0.2. does anyone have any ideas?

Thanks

Andrew

[adrian.brock]

Marking something as Serializable only
declares an intention.

e.g.

public class MyClass implements Serializable
{
public ArrayList list;
}

This looks ok, until you do:
list.add(new Object());

The MyClass is no longer serializable because Object
is not Serializable.

There are other reasons why the object might be
serialized. Try running your object instance through
this code to see whether you get a more informative
IOException:

ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
ObjectOutputStream objectOut = new ObjectOutputStream( byteArray );
objectOut.writeObject( object );
objectOut.close();

Regards,
Adrian

[andrewboyd]

Thanks Adrian,
Turns out we put in Log4J and it wasn't Serializable
java.io.NotSerializableException: org.apache.log4j.Logger

Your code pointed it out right away.

Thanks again,

Andrew