"clebert.suconic(a)jboss.com" wrote : So... what's the solution for us then? Comment out the test for now and aways make the tests are using multiple VMs? | The solution is to do what I asked and provide the details so we can debug the issue. You can't run multiple channels with the same singleton name and the same channel name in the same VM. That's a hassle in testsuites, which is where people typically try to do that. This is not a regression; JBM didn't have a singleton name in its config before. You and I discussed the two workarounds to this, which are basically testsuite config changes. You say the workarounds didn't work. We need to understand why not, so we can determine if that means there is an actual JGroups regression. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4189829#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...