Ok, here it goes the way we made it work. All the nodes are async='true' All the forks are async='true' All the joins are async='true' and lock='UPGRADE' The graph has to be legal (have certain simmetry) As explained in http://www.jboss.com/index.html?module=bb&op=viewtopic&t=147553. If the graph is not legal, and the joins are async you probably will experience that some branches of the workflow are not executed. In case there is anyone interested I will post the complete processdefinition.xml. Some of the settings above might not be needed (I think the async='true' in the forks makes no difference) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4198029#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...