[jboss-dev-forums] [jBPM Development] - jbpm process variable - Classcastexception/ classloader issues

[Mahavir Jain]

Mahavir Jain [http://community.jboss.org/people/mahavirj] created the discussion

"jbpm process variable - Classcastexception/ classloader issues"

To view the discussion, visit: http://community.jboss.org/message/572147#572147

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Hi,
I am able to start a jbpm4.4 process from a servlet by passing a process variable (com.process.servicedata.Plan).  However, a decision handler later in the process gets a classcast exception when accessing this variable:


java.lang.ClassCastException

: com.process.servicedata.Plan cannot be cast to com.process.servicedata.Plan
at com.process.activitymodel.HealthPlanDecisionHandler.decide(
HealthPlanDecisionHandler.java:15)
at org.jbpm.jpdl.internal.activity.DecisionHandlerActivity.execute(
DecisionHandlerActivity.java:60)
at org.jbpm.jpdl.internal.activity.DecisionHandlerActivity.execute(
DecisionHandlerActivity.java:42)
at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(
ExecuteActivity.java:60)
at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(
ExecutionImpl.java:672)
at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(
ExecutionImpl.java:632)
at org.jbpm.pvm.internal.model.op.TransitionEndActivity.perform(
TransitionEndActivity.java:56)


 

 

 

 

 

 

 
This appears to be a classloader problem, so here are the details on my project structure:


1. process-web.war contains the servlet that starts the process.

 1. process.jpdl.xml is in process.jar

2. process.jar is in WEB-INF/lib of process-web.war. 

3. all the jbpm libraries (e.g. jbpm.jar) are in the WEB-INF/lib. 

4. process.jpdl.xml in process.jar is deployed using an Ant script that was taken from the examples app that comes with jbpm. 

5. process-web.war is deployed to jboss 5 and uses jbpm 4.4.


Any clues on what am I missing?

Thanks,
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