MessageDrivenBean(EJB3.0) when depoyed on IBM WAS 8.0 gives 'no onMessage() method'

Question

MDB class implements MessageListener (javax.jms.MessageListener) and this ejb is packaged as an ear and deployed on IBM WAS 8.0.

MDB listens on a queue. Whenever there is message on the queue, the MDB tries to listen on to that queue , immediately gives the below exception.

Exception:

[4/27/16 18:09:50:420 CDT] 000000c2 SibMessage    W   [:] CWSJY0003W: MQJCA1003: The message endpoint has no onMessage() method. Deployment failed.
[4/27/16 18:09:50:431 CDT] 000000c2 SibMessage    W   [:] CWSJY0003W: JMSCC0109: A message driven bean threw a runtime exception '
                       Message : java.lang.RuntimeException: no onMessage() method
                         Class : class java.lang.RuntimeException
                         Stack : com.ibm.mq.connector.inbound.MessageEndpointWrapper.onMessage(MessageEndpointWrapper.java:142)
                               : com.ibm.mq.jms.MQSession$FacadeMessageListener.onMessage(MQSession.java:147)
                               : com.ibm.msg.client.jms.internal.JmsSessionImpl.run(JmsSessionImpl.java:2846)
                               : com.ibm.mq.jms.MQSession.run(MQSession.java:862)
                               : com.ibm.mq.connector.inbound.WorkImpl.run(WorkImpl.java:297)
                               : com.ibm.ejs.j2c.work.WorkProxy.run(WorkProxy.java:608)
                               : com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1690)
'.
[4/27/16 18:09:50:431 CDT] 000000c2 SibMessage    W   [:] CWSJY0003W: MQJCA4004: Message delivery to an MDB '{project#className}' failed with exception: 'no onMessage() method'  
[4/27/16 18:09:50:469 CDT] 000000c2 ActivationSpe I   J2CA0524I: The Message Endpoint for ActivationSpec {activationspec JNDI} (com.ibm.mq.connector.inbound.ActivationSpecImpl) and MDB Application {project#className} is deactivated.

Class the implements MessageListener

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;
import javax.ejb.MessageDriven;
import javax.ejb.ActivationConfigProperty;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@MessageDriven(
           name = "MDBClass", 
           activationConfig = { @ActivationConfigProperty( propertyName = "destinationType", propertyValue = "javax.jms.Queue"),
                                @ActivationConfigProperty( propertyName = "destination", propertyValue ="jms/queue") 
                            }
           )
public class MDBClass implements MessageListener  {

    private static final Logger logger = LoggerFactory.getLogger(MDBClass.class);

    TextMessage txtMsg = null;
    String strMsg = null;
    @Override
    @TransactionAttribute(TransactionAttributeType.REQUIRED)
    public void onMessage(Message message) {
        if (message instanceof TextMessage) {
            txtMsg = (TextMessage) message;
            try {
                strMsg = txtMsg.getText();
            } catch (JMSException e) {
                e.printStackTrace();
            }
        }
    }
}

Not sure what I'm missing.