sub-process null pointer exception
knoxit Jan 30, 2006 7:28 AMHello,
I am trying to get sub-processes running, however encounter following null pointer exception.
The process definitions are deployed in mysql with ID 3 for "sub" and ID 7 for "super" both Version 1. when "super" calls itself instead of "sub" it works. database connection is up, since "super" is started fine.
I'm running jbpm3.1beta2.
I would appreciate any help.
Thanks. Nima
<process-definition xmlns="http://jbpm.org/3/jpdl" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jbpm.org/3/jpdl http://jbpm.org/xsd/jpdl-3.0.xsd" name="sub"> <start-state name="start"> <transition name="to_end" to="end"></transition> </start-state> <end-state name="end"></end-state> </process-definition>
<process-definition xmlns="http://jbpm.org/3/jpdl" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jbpm.org/3/jpdl http://jbpm.org/xsd/jpdl-3.0.xsd" name="super"> <start-state name="start"> <transition name="to_sub" to="process1"></transition> </start-state> <end-state name="end"></end-state> <process-state name="process1"> <sub-process name="sub"/> <transition name="to_end" to="end"></transition> </process-state> </process-definition>
13:07:09,049 [main] DEBUG DbPersistenceService : creating hibernate session 13:07:09,082 [main] DEBUG DbPersistenceService : beginning hibernate transaction 13:07:09,246 [main] DEBUG GraphElement : event 'process-start' on 'ProcessDefinition(super)' for 'Token(/)' 13:07:09,283 [main] DEBUG GraphElement : event 'before-signal' on 'StartState(start)' for 'Token(/)' 13:07:09,286 [main] DEBUG GraphElement : event 'node-leave' on 'StartState(start)' for 'Token(/)' 13:07:09,286 [main] DEBUG GraphElement : event 'transition' on 'Transition(to_sub)' for 'Token(/)' 13:07:09,289 [main] DEBUG GraphElement : event 'node-enter' on 'ProcessState(process1)' for 'Token(/)' 13:07:09,291 [main] DEBUG JbpmContext : closing JbpmContext 13:07:09,296 [main] DEBUG Services : closing service 'persistence': org.jbpm.persistence.db.DbPersistenceService@186dda3 13:07:09,296 [main] DEBUG DbPersistenceService : committing hibernate transaction 13:07:09,338 [main] DEBUG DbPersistenceService : closing hibernate session Caused by: java.lang.NullPointerException: can't create a process instance when processDefinition is null at org.jbpm.graph.exe.ProcessInstance.<init>(ProcessInstance.java:93) at org.jbpm.graph.exe.Token.createSubProcessInstance(Token.java:518) at org.jbpm.graph.node.ProcessState.execute(ProcessState.java:125) at org.jbpm.graph.def.Node.enter(Node.java:315) 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:161) at org.jbpm.graph.def.Node$$EnhancerByCGLIB$$34036b6.enter(<generated>) at org.jbpm.graph.def.Transition.take(Transition.java:113) at org.jbpm.graph.def.Node.leave(Node.java:381) at org.jbpm.graph.node.StartState.leave(StartState.java:70) at org.jbpm.graph.node.StartState$$FastClassByCGLIB$$4ed4ed8c.invoke(<generated>) at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:161) at org.jbpm.graph.node.StartState$$EnhancerByCGLIB$$4a3fd3e8.leave(<generated>) at org.jbpm.graph.exe.Token.signal(Token.java:180) at org.jbpm.graph.exe.Token.signal(Token.java:129) at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:236) ...