"clebert.suconic(a)jboss.com" wrote : I'm using 2.6.5.GA, as I thought that was the version available at JBoss5. Ok, that should be fine. FYI, here's what's in 2.6.6: https://jira.jboss.org/jira/secure/IssueNavigator.jspa?reset=true&pid... The big one is JGRP-849. Does your testsuite concurrently start 2 control channels from the same channel factory? anonymous wrote : It is hard to replicate this error. I have to run the whole testsuite (about 2-3 hours) and it will happen eventually. But do you have logs from the failure you reported? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4187167#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...