Alex, If you search for "StaleObjectStateException", you'll see other instances on this forum where it occurs after a fork. I don't know if it has the same cause as yours, because you didn't report any details about what you're doing. Unfortunately, no one bothered to follow up with a resolution or workaround, if one was found. Also, see http://jira.jboss.com/jira/browse/JBPM-626. I'm not sure if it's relevant. It's reported in enough detail that you can probably tell. But again, unfortunately, no resolution or workaround was reported, if found. I suggest that you prove to yourself that when your async events kick off, you're picking up the different node instances - not accidentally grabbing the same node instance, somehow. Beyond that, sorry, I got nuthin'. Please report what you find - this will be my problem soon, too! -Ed Staub View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049324#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...