Ugrent, Invoke WebServices twice cause exception

[fwshk]

Hi all,

I have a BPEL process which interact with a WebService

The process flow are as following:
1. Receive
- (Init the correlation)
2. Assign
3. Invoke WebService.operation1
- (inputVariable=var1, no outputVariable)
4. Receive
- (Correlated) // Resume process
5. Invoke WebService.operation2
- (inputVariable=var1, outputVariable=var2)

While executing the process exception throw at 5
I tried to swap the 3 and 5 and execute again, exception still throw at 5
Then, I change 5 to empty, execute again and no exception thrown

Is that a bug of BPEL?
Please help me how to solve it.

org.jbpm.graph.def.DelegationException
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:299)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.bpel.service.messager.RequestListener.onMessage(RequestListener.java:115)
 at org.jboss.mq.SpyMessageConsumer.run(SpyMessageConsumer.java:707)
 at java.lang.Thread.run(Thread.java:595)
Caused by: org.jbpm.graph.def.DelegationException
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:299)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.bpel.def.Activity.enter(Activity.java:89)
 at org.jbpm.graph.def.Transition.take(Transition.java:92)
 at org.jbpm.graph.def.Node.leave(Node.java:349)
 at org.jbpm.bpel.def.Activity.leave(Activity.java:149)
 at org.jbpm.bpel.def.Receive.messageReceived(Receive.java:45)
 at org.jbpm.bpel.service.messager.RequestListener.onMessage(RequestListener.java:112)
 ... 2 more
Caused by: org.jbpm.graph.def.DelegationException
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:299)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293)
 at org.jbpm.bpel.def.Activity.enter(Activity.java:89)
 at org.jbpm.graph.def.Transition.take(Transition.java:92)
 at org.jbpm.graph.def.Node.leave(Node.java:349)
 at org.jbpm.bpel.def.Activity.leave(Activity.java:149)
 at org.jbpm.bpel.def.Assign.execute(Assign.java:36)
 at org.jbpm.bpel.def.Activity.enter(Activity.java:84)
 ... 7 more
Caused by: java.lang.NullPointerException
 at org.jbpm.bpel.xml.util.XmlUtil.copyAttributes(XmlUtil.java:663)
 at org.jbpm.bpel.xml.util.XmlUtil.copy(XmlUtil.java:617)
 at org.jbpm.bpel.service.soap.PortCaller.writeRpcBody(PortCaller.java:218)
 at org.jbpm.bpel.service.soap.PortCaller.writeInputMessage(PortCaller.java:176)
 at org.jbpm.bpel.service.soap.PortCaller.callImpl(PortCaller.java:129)
 at org.jbpm.bpel.service.soap.PortCaller.call(PortCaller.java:92)
 at org.jbpm.bpel.service.messager.MessagerSession.invoke(MessagerSession.java:140)
 at org.jbpm.bpel.service.def.Invoker.invoke(Invoker.java:80)
 at org.jbpm.bpel.def.Invoke.execute(Invoke.java:27)
 at org.jbpm.bpel.def.Activity.enter(Activity.java:84)
 ... 12 more

My Setting:
- OS: WindowsXP SP2
- Java: 1.5.06
- Database: MySQL 5.0.21
- jBPM BPEL: 1.0-alpha4
- jBoss: 4.0.3SP1

Any replies are welcome and thank you very much.
Roy

[fwshk]

Hi all,

I fixed the problem.
It seems var1 is reset after 4 and cause exception while invoking WebService.
My solution is copy 2 and paste between 4 and 5

Anyway, thank you very much.
Roy