2 Replies Latest reply on Jun 25, 2010 10:31 AM by A Ghosh

    sub process call from jbpm api

    A Ghosh Newbie

      I am trying to invoke a simple sub process from a main process using the below mentioned code using jbpm-jpdl-3.2.3:

      public class TestSubProcess implements ActionHandler{

      Token superProcessToken = executionContext.getToken();
      ProcessDefinition subProcessDefinition = ProcessDefinition
      ProcessInstance subProcessInstance = superProcessToken.createSubProcessInstance(subProcessDefinition);


      I have a very simple sub process mentioned below:
      <process-definition xmlns="" name="user_sub_process">
                  <transition to="CustomComp" />
            <node  name="CustomComp">
                  <action class="com.cts.action.CustomAction" />
                  <transition to="end" />

            <end-state name="end" />


      This my CustomAction class in sub process .
      public class CustomAction implements ActionHandler {
             * long serialVersionUID
            private static final long serialVersionUID = 1L;
            private static final Logger log = Logger.getLogger(CustomAction.class

            public void execute(ExecutionContext executionContext) throws Exception {
                  log.info("executing custom node:::");


      It executes the custom node (that is it fires the sub process) and then gives the exception.
      ERROR [GraphElement] - action threw exception: couldn't signal without specifying  a leaving transition : transition is null
      org.jbpm.JbpmException: couldn't signal without specifying  a leaving transition : transition is null
            at org.jbpm.graph.exe.Token.signal(Token.java:173)
            at org.jbpm.graph.exe.Token.signal(Token.java:168)
            at org.jbpm.graph.exe.ProcessInstance.end(ProcessInstance.java:322)
            at org.jbpm.graph.exe.Token.notifyParentOfTokenEnd(Token.java:329)
            at org.jbpm.graph.exe.Token.end(Token.java:301)
            at org.jbpm.graph.exe.Token.end(Token.java:251)
            at org.jbpm.graph.node.EndState.execute(EndState.java:59)
            at org.jbpm.graph.def.Node.enter(Node.java:318)
            at org.jbpm.graph.def.Transition.take(Transition.java:151)
            at org.jbpm.graph.def.Node.leave(Node.java:393)
            at org.jbpm.graph.def.Node.leave(Node.java:357)
            at org.jbpm.graph.exe.ExecutionContext.leaveNode(ExecutionContext.java:120)
            at com.cts.action.CustomAction.execute(CustomAction.java:18)

      It seems that jbpm is trying to force a transition after reaching the end state.I am not sure that why it is trying to signal after reaching the end state.

      The same thing works if I do this in the main process that is by using process state:
      <process-state name="process-state">
                  <sub-process name="user_sub_process" binding="late"></sub-process>
                  <transition to="end"></transition>

      I am not sure that what am I doing wrong out here.