1 Reply Latest reply on Jan 30, 2006 5:43 PM by Brian Bulthuis

    Null pointer exception using process-state

    Brian Bulthuis Newbie

      Hello,

      I'm attempting to use process-states and subprocesses in my definitions, but I'm encountering a problem during execution.

      Here is the process-state spec from my process def document:

      <process-state name="SubProcessName">
       <sub-process name="SubProcessName"></sub-process>
       </process-state>

      The subprocess is specified elsewhere, is loaded in the jbpm database, and runs fine on its own. When the superprocess hits this node in its graph, however, I'm getting this exception:
      Caused by: java.lang.NullPointerException
       at org.jbpm.graph.def.Transition.fireSuperStateEnterEvents(Transition.java:103)
       at org.jbpm.graph.def.Transition.take(Transition.java:82)
       at org.jbpm.graph.def.Node.leave(Node.java:349)
       at org.jbpm.graph.node.TaskNode.leave(TaskNode.java:167)
       at org.jbpm.graph.def.Node$$FastClassByCGLIB$$d187eeda.invoke(<generated>)
       at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
       at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:137)
       at org.jbpm.graph.def.Node$$EnhancerByCGLIB$$430d7fc8.leave(<generated>)
       at org.jbpm.graph.exe.Token.signal(Token.java:127)
       at org.jbpm.graph.exe.Token.signal(Token.java:92)
       at org.jbpm.graph.exe.Token$$FastClassByCGLIB$$74df1c6e.invoke(<generated>)
       at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
       at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:137)
       at org.jbpm.graph.exe.Token$$EnhancerByCGLIB$$1ed5f17c.signal(<generated>)
       at org.jbpm.webapp.bean.ProcessInstanceBean.signal(ProcessInstanceBean.java:271)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
       at java.lang.reflect.Method.invoke(Unknown Source)

      I've been reading through the 3.0.2 source to try to find the cause of this, and am getting a little frustrated, so if anyone has ideas, I'd appreciate them.

      I'm using version 3.0.2 - the latest compiled release.

      Thanks!

      -Brian