Hi Hiram,

Thanks for the suggestion.
In fact, I'm using TCP to connect to ActiveMQ... but it seems not working though.

Btw, I've found a blog: http://jroller.com/page/sjivan?entry=asynchronous_calls_and_callbacks_using Sanjiv (the blogger) explained about asynchornous invocation in which I am thinking that could be a root cause.

Since I have the [manager.war] and quite number of modules, [module1.war], [module2.war], [module3.war] .... As explained in the blog... I understood that with my current configuration, by using JmsServiceExporter, the manger uses a single JMS Session to handle concurrent messages that are sent by modules. Here we go, the situation is getting worse here....

I'm not an expert in JMS so I can't explain well in this. How do you all think about it?

Trung


Hiram Chirino wrote:
JBoss has a long history of using funky non-standard classloaders.  It
has burned many folks in the past and since the classloaders are not
standard classloaders, it hard to debug the issue at times.  The
easiest thing I can recommend is that you use TCP transport to connect
to your brokers.  Hopefully the serialization that this forces will
fixe your classloading issues.

On 8/1/06, Nguyen Kien Trung <[EMAIL PROTECTED]> wrote:
Thanks, James for the prompt reply.

You're right about the classloader. In my third log.debug(), I tried to
compare classloader of two classes (whose types look the same)
And it returns FALSE. It means, there's a difference in classloader.

I'm not quite familiar with classloader stuff, so let's me explain my
package deployment so that you could help me to figure out.

I deploy in JBoss 4.0.4.GA as war files, each war file contains Core.jar
(which has all model classes - classes that i'm talking above regarding
the error) and Lingo.jar
[FrontEnd.war]
        ||
        || ActiveMQ
        ||
[Manager.war]
        ||
        || ActiveMQ
        ||
[Module.war]

There are 2 things which may be important to consider
1) When i switch to JBossMQ, then things are going just fine.
2) The error occurs randomly - not for particular method in the proxy object
3) When I try to debug - timing delay - then there's no error

>>      log.debug("equal class loader ==? : " +
>> (m.getParameterTypes()[0].getClassLoader() ==
>> invocation.getParameterTypes()[0].getClassLoader())); // return false




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