You're right. First, my ActionHandler was a simple class, which did not implement the ActionHandler interface. That was the problem Here is a simple one: import org.jbpm.graph.def.ActionHandler; | import org.jbpm.graph.exe.ExecutionContext; | | public class InvalidEmailAddressExceptionHandler implements ActionHandler { | | private static final long serialVersionUID = 1L; | | public void execute(ExecutionContext executionContext) { | | System.out.println("wrong email"); //FIXME crash when insertion of log into database | | } | | } Now, the other issue has been posted in a new topic : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4229030#... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4229032#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...