"adrian(a)jboss.org" wrote : | then they might end up processing each other's stuff but they won't miss one. I wasn't thinking about missing one. I had this in mind (#t = #thread): 1t - addDeployment 1t - process While 1t is just done with process' undeploy part, but before it enters processTopDeploy, 2t does addDeployment, but it's really re-deploy. Meaning it will add its previous context to undeploy, which wouldn't be processed until 2t calls process, but itself would be picked-up by 1t's processToDeploy. In this case the 2t's re-deploy's undeploy wouldn't happen, only deploy, which can lead to whatever. :-) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211789#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...