Thanks Justin, can you please advise where to change the maxSession or the instance pool value in the configuration?

I have seen this configuration in standalone.xml

<bean-instance-pools>
                    <strict-max-pool name="slsb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>
                    <strict-max-pool name="mdb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>
</bean-instance-pools>

but I didnot touch this in 7.1.1 version and there was no such problem. Please advise.

I can be sure that there is no any place calling Thread.interrupt() in the code. The strange thing is I increased the "max-pool-size" to 100 and now I am not seeing this error any more. Do not know why. BTW, is there any side-effect if I increase the "max-pool-size" to a much bigger value?

Also met with such error message. It seems relating to interuput again. There is no special case. Just sending a lot of messages at the same time.

2013-04-02 13:16:11,582;[Thread-115 (HornetQ-client-global-threads-1511848790)];ERROR;com.demo.FileSystemDemoMDB;Problem handling JMS message: javax.jms.JMSException: Failed to create session factory
          at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:587)
          at org.hornetq.jms.client.HornetQConnectionFactory.createQueueConnection(HornetQConnectionFactory.java:119)
          at org.hornetq.jms.client.HornetQConnectionFactory.createQueueConnection(HornetQConnectionFactory.java:114)
          at com.demo.DemoMDB.onMessage(DemoMDB.java:182)
          at sun.reflect.GeneratedMethodAccessor361.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
          at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:58)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
          at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:58)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.tx.EjbBMTInterceptor.handleInvocation(EjbBMTInterceptor.java:104)
          at org.jboss.as.ejb3.tx.BMTInterceptor.processInvocation(BMTInterceptor.java:56)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
          at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:65)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponentDescription$5$1.processInvocation(MessageDrivenComponentDescription.java:196)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
          at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:165)
          at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:182)
          at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
          at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
          at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:72)
          at javax.jms.MessageListener$$$view43.onMessage(Unknown Source)
          at sun.reflect.GeneratedMethodAccessor126.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.jboss.as.ejb3.inflow.MessageEndpointInvocationHandler.doInvoke(MessageEndpointInvocationHandler.java:140)
          at org.jboss.as.ejb3.inflow.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:73)
          at $Proxy14.onMessage(Unknown Source)
          at org.hornetq.ra.inflow.HornetQMessageHandler.onMessage(HornetQMessageHandler.java:313)
          at org.hornetq.core.client.impl.ClientConsumerImpl.callOnMessage(ClientConsumerImpl.java:1016)
          at org.hornetq.core.client.impl.ClientConsumerImpl.access$400(ClientConsumerImpl.java:52)
          at org.hornetq.core.client.impl.ClientConsumerImpl$Runner.run(ClientConsumerImpl.java:1161)
          at org.hornetq.utils.OrderedExecutorFactory$OrderedExecutor$1.run(OrderedExecutorFactory.java:106)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
          at java.lang.Thread.run(Thread.java:619)
Caused by: org.hornetq.api.core.HornetQInterruptedException: java.lang.InterruptedException
          at org.hornetq.core.remoting.impl.netty.NettyConnection.write(NettyConnection.java:244)
          at org.hornetq.core.protocol.core.impl.ChannelImpl.send(ChannelImpl.java:268)
          at org.hornetq.core.protocol.core.impl.ChannelImpl.send(ChannelImpl.java:195)
          at org.hornetq.core.client.impl.ClientSessionFactoryImpl$PingRunnable.send(ClientSessionFactoryImpl.java:1767)
          at org.hornetq.core.client.impl.ClientSessionFactoryImpl.getConnection(ClientSessionFactoryImpl.java:1371)
          at org.hornetq.core.client.impl.ClientSessionFactoryImpl.getConnectionWithRetry(ClientSessionFactoryImpl.java:1071)
          at org.hornetq.core.client.impl.ClientSessionFactoryImpl.connect(ClientSessionFactoryImpl.java:246)
          at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:826)
          at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:583)
          ... 61 more
Caused by: java.lang.InterruptedException
          at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1215)
          at java.util.concurrent.Semaphore.acquire(Semaphore.java:286)
          at org.hornetq.core.remoting.impl.netty.NettyConnection.write(NettyConnection.java:175)

Or can you suggest a standard piece of code to create and send out a JMS message in 6.1.0 version? I donot know if my code of sending JMS message has problems or not. Please advise.

private QueueConnectionFactory m_queueConnectionFactory;
private InitialContext m_initialContext;

public void ejbCreate()
{
m_initialContext = new InitialContext();
m_queueConnectionFactory = (QueueConnectionFactory) m_initialContext
                    .lookup(JmsHelper.JMS_QUEUE_FACTORY_NAME);
}

public void sendMsg()
{

QueueConnection queueConnection = m_queueConnectionFactory.createQueueConnection();
queueConnection.start();

QueueSession session = queueConnection.createQueueSession(false,
                    Session.AUTO_ACKNOWLEDGE);
Queue queue = (Queue) m_initialContext.lookup("jmsName");
QueueSender sender = session.createSender(queue);
ObjectMessage om = session.createObjectMessage(myMessageObject);
sender.send(om);

}

The simple case is I am invoking sendMsg() in a loop (more than 100 times or so), and sometimes I can see that error message in the log.

Hi Justin, much appreciated for your suggestions.

3. Do the session and sender object need to be closed in a finally block as well?

4. I am not sure how to avoid using javax.jms.ObjectMessage. Do you mean using javax.jms.Session.createTextMessage() instead? But I am having an object that contains some hashMaps that need to pass between the MDBs. Can this be done?

5. I tried to use javax.jms.Session.createQueue(String) instead of doing another JNDI lookup for the queue, but it seems not working. Can you advise?

2013-04-03 11:02:04,012;[Thread-189];ERROR;com.demo.DemoHandler;Test failed.: javax.jms.JMSException: There is no queue with name queue/demoQueue
               at org.hornetq.jms.client.HornetQSession.createQueue(HornetQSession.java:402)
               at org.hornetq.ra.HornetQRASession.createQueue(HornetQRASession.java:860)

The jms queue configuration is

<jms-queue name="demoQueue">
                        <entry name="queue/demoQueue"/>
</jms-queue>

(Just tried with javax.jms.Session.createQueue("demoQueue") and it works. But what is the entry element used for?)

And can you give me an instruction link or some site that shows how to use Byteman?

Appreciated again for what you have done for me

Thanks Justin. Please ignore the byteman for now. I have read the user manual of HornetQ and found there is method to create connection factory directly using API instead of using JNDI.

The code is mostly like

TransportConfiguration transportConfiguration = 
                     new TransportConfiguration(NettyConnectorFactory.class.getName());                
ConnectionFactory cf = HornetQJMSClient.createConnectionFactoryWithoutHA(JMSFactoryType.CF,transportConfiguration);

Queue demoQueue= HornetQJMSClient.createQueue("demoQueue");

Connection connection = cf.createConnection();

Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

MessageProducer producer = session.createProducer(demoQueue);

connection.start();

TextMessage message = session.createTextMessage("This is a demo");
producer.send(message);

Do you know what the difference is between them and which one is better and suggested? Please advise.