Hi,

We are experimenting a very uncommon behaviour within JMS stand-alone clients. 
On the AS we are running an application that produces messages continuously 
(small messages) for monitoring issues. For this we are using a Topic, with 
null persistance manager.

On the other hand, we have a fat client (a Java Web Start application) which is 
downloaded from the same AS. This application, listens through 
MessageListeners, the messages that are produced in the AS.

The problem is that the client application always work  fine in some machines 
(can listen to messages), and never works in another ones without producing any 
kind of exception. All the machines where tested with no firewall running.

We are developing our app. with 4 computers, so we have an app. server on each 
one. We exchanged the entire AS from one machine to another, or even changed 
the IP addresses but the behaviour is exactly the same.  

In all cases without exception, if a machine "A" is running the AS, and the 
machine "B" is running the client app; if "B" can monitor "A" (receive 
messages) , then, if we invert this situation (run the AS on "B"), "A" can 
connect to "B" but it doesn´t get any messages.

We tested the above example with all posible combinations within 4 computers 
with the same results.

PLEASE HELP US!!!! WE RAN OUT OF IDEAS!!!!!

We are using:
Jboss server v.4.0.0. (In all machines)
J2SDK 1.4.2_08. (In all machines)
Windows XP Pro SP2. (on 3 machines)
Linux Suse 9.0. (on 1 workstation)


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