Singleton MDB stops receiving messages after a randomic time

[uji]

Hi,

I am experiencing a very critical problem: a mdb stop processing the messages published on its queue after having received (working accordingly) a randomic numer a messages.

I have to restart the AS to have it working again. Also creating a new instance of the MDB from the jmx-console works.

I looked on the forum and I found some suggestions (updating the concurret.jar package) but none worked.

Thanks,

[uji]

I am using JBoss 4.0.3SP1

MDB use the configuration "Singleton Message Driven Bean"