Does anyone have experienced this and has a suggestion?
I am using JBoss 4.2.3.GA with JBoss-Messaging 1.4.2.GA-SP1
In my real application, I have now and then observed a JMS Message not received at one or the other client.
To reproduce and analyze the same, I have made simple program closer to my scenario and focus on JMS.
Let me brief you the scenario:
1. A stateless Bean deployed with a method that generates 100 JMS messages to JMS Topic. Its more frequent when message size is ~1k.
2. An external client 'API-Caller' that invokes the bean and calls the method, once every second for duration of 1-min. I launch typically more than 40 such clients.
3. I stamped each Message with EventNumber, an incremental number to uniquely identify it.
4. A Client 'Event-Listener' which subscribes to the JMS Topic and waits/receives messages. I launch 4 instances of this client on two different systems with 2 on each. Each 'Event-Listener' notes that the EventNumber if JMS Message skips a number.
I am running JBoss on Windows7 64-bit and Debian-Linux(Squeeze)
And Clients 'API-Caller' and 'Event-Listener' on WindowsXP machine.
Running this test, I see that some JMS Messages are not received by one or the other client. Also, a Message received by one client is not recieved by other running on same system.
A code outline of my stateless Bean :-------------------------------------->
public class MyBean
private static synchronized int getEventNumber ()
public int produce100Messages (int PayloadInBytes)
Connection connection = null;
Session session = null;
MessageProducer publisher = null;
Integer num = 0;
String payload = "";
for(int i=0; i<PayloadInBytes; i++)
payload += "Z";
InitialContext ic = new InitialContext();
ConnectionFactory cf = (ConnectionFactory) ic.lookup("java:/JmsXA");
Topic topic = (Topic) ic.lookup("topic/MyTopic");
connection = cf.createConnection();
session = connection.createSession(true, Session.SESSION_TRANSACTED);
publisher = session.createProducer(topic);
num = getEventNumber();
num = num * 100;
for (int i = 0; i < 100; i++)
Message msg = session.createTextMessage(num.toString() + ";" + payload);
catch (Exception anException)
//Close producer, session, and connection
The code outline at subscriber end :------------------------------------------->
public class MYMsgListener
public void onMessage (Message anArg0)
String arrStr = ((TextMessage) anArg0).getText().split(";");
Integer eventNumber = Integer.parseInt(arrStr);
JMS-Samples.zip 8.9 KB