[esb-issues] [JBoss JIRA] Created: (JBESB-1897) ClassCastException while Drools is getting shadow object

[Martin Vecera (JIRA)]

ClassCastException while Drools is getting shadow object
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                 Key: JBESB-1897
                 URL: https://jira.jboss.org/jira/browse/JBESB-1897
             Project: JBoss ESB
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Process flow
    Affects Versions: 4.3
         Environment: Drools 4.0.2 and 4.0.7 (tried with both), mvel 1.2.24 and 1.3.1 (tried with both), QS bpm_orchestration4
            Reporter: Martin Vecera


Reproducible 100%

= Basic plot =
bpm_orchestration4 has the following message flow (it is little bit simplified but covers important parts): starter service -> jBPM process that calls -> intake service with Drools action -> back to jBPM process -> task assigned to an user -> jBPM process calls -> discount service with another Drools action (*)

(*) Shows the part where problem arises (inside Drools action):
2008-08-04 08:42:16,210 WARN  [org.jboss.soa.esb.listeners.message.ActionProcessingPipeline] Unexpected exception caught while processing the action pipeline: header: [ To: InVMEpr [ PortReferenc
org.drools.RuntimeDroolsException: Error creating shadow fact for object: 2, Wed Nov 15 19:45:28 GMT+01:00 2006, 0, 59.97, 64.92, 4.95,
        at org.drools.reteoo.Rete$ClassObjectTypeConf.getShadow(Rete.java:636)
        at org.drools.reteoo.Rete.assertObject(Rete.java:164)
        at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
        at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:684)
        at org.jboss.internal.soa.esb.services.routing.cbr.JBossRulesRouter.route(JBossRulesRouter.java:169)
        at org.jboss.soa.esb.actions.BusinessRulesProcessor.process(BusinessRulesProcessor.java:58)
        at org.jboss.soa.esb.listeners.message.ActionProcessingPipeline.process(ActionProcessingPipeline.java:316)
        at org.jboss.soa.esb.listeners.message.MessageAwareListener$TransactionalRunner.run(MessageAwareListener.java:530)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.ClassCastException: org.jboss.soa.esb.store.OrderHeader
        at org.jboss.soa.esb.store.OrderHeaderShadowProxy.setShadowedObject(Unknown Source)
        at org.drools.reteoo.Rete$ClassObjectTypeConf.getShadow(Rete.java:634)
        ... 13 more

The same exception is thrown for both Drools/mvel versions.
You have to execute the QS at least TWICE to get the exception (for the first time it works well)!

Steps to reproduce:
1. get ESB 4.3.0GA binaries, start it
2. execute samples/quickstarts/bpm_orchestration4 (ant deploy, deployProcess, startProcess)
3. click "Save and Close" on every task that appears in jBPM console
4. the first time the QS finishes without problems so run ant startProcess once more
5. click "Save and Close" on the first task in jBPM console, you won't get the second task assigned since the exception is thrown

This QS (from version 4.3.0.GA) works fine with ESB server from trunk (08/04/2008).

When I skipped the return from the intake service to jBPM process and put static router from intake service directly to discount service (skipping appropriate process nodes as well), the problem didn't show up.


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