New subject: [JBoss JIRA] Updated: (JBRULES-2681) Drools: Unable to load session snapshot

Thursday, 2 September 2010

Drools: Unable to load session snapshot
---------------------------------------

                 Key: JBRULES-2681
                 URL: https://jira.jboss.org/browse/JBRULES-2681
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 5.1.0.FINAL
         Environment: Windows Server, SQL Server 2005, Tomcat 5.5, Hibernate, Bitronix
            Reporter: Gustavo Tenrreiro
            Assignee: Mark Proctor

After an event is processed the session fails to load using JPA persistence.

I ve attached a test case.
It uses a Drools flow file, and a drl file. Both very simple..
The flow file has a "Start" then an action that prints a message to the console,
then "End"

The Drl has one rule that processes an event:

import com.kgcontrols.services.company.standardsRequests.workflow.events.VoteCreatedEvent

declare VoteCreatedEvent
       @role(event)
end

rule "testEvents"
       when
               VoteCreatedEvent() from entry-point "VoteCreatedStream"

       then
               System.out.println("--------------------------- YEAH the event got
here");
end

I can see the "YEAH the event go here" on the console so I know the rule fired.
But after that, if I try to load the session from the database I get:

   1.
      INFO  2010-09-02 08:28:56 [ERROR] com.kgcontrols.services.company.standardsRequ
   2.
      ests.workflow.TimerRunner java.lang.reflect.InvocationTargetException
   3.
      java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException
   4.
             at org.drools.persistence.jpa.impl.KnowledgeStoreServiceImpl.buildComman
   5.
      Service(KnowledgeStoreServiceImpl.java:106)
   6.
             at org.drools.persistence.jpa.impl.KnowledgeStoreServiceImpl.loadStatefu
   7.
      lKnowledgeSession(KnowledgeStoreServiceImpl.java:74)
   8.
             at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeS
   9.
      ession(JPAKnowledgeService.java:118)
  10.
             at com.kgcontrols.services.company.standardsRequests.workflow.JPAKnowle
  11.
      dgeSessionLookup.loadSession(JPAKnowledgeSessionLookup.java:103)
  12.
             at com.kgcontrols.services.company.standardsRequests.workflow.TimerRunn
  13.
      er.run(TimerRunner.java:39)
  14.
             at java.lang.Thread.run(Thread.java:619)
  15.
      Caused by: java.lang.reflect.InvocationTargetException
  16.
             at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  17.

  18.
             at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct
  19.
      orAccessorImpl.java:39)
  20.
             at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC
  21.
      onstructorAccessorImpl.java:27)
  22.
             at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
  23.
             at org.drools.persistence.jpa.impl.KnowledgeStoreServiceImpl.buildComman
  24.
      Service(KnowledgeStoreServiceImpl.java:91)
  25.
             ... 5 more
  26.
      Caused by: java.lang.RuntimeException: Unable to load session snapshot
  27.
             at org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapsh
  28.
      ot(JPASessionMarshallingHelper.java:96)
  29.
             at org.drools.persistence.session.SingleSessionCommandService.initKsessi
  30.
      on(SingleSessionCommandService.java:196)
  31.
             at
org.drools.persistence.session.SingleSessionCommandService.<init>(Sin
  32.
      gleSessionCommandService.java:159)
  33.
             ... 10 more
  34.
      Caused by: java.lang.NullPointerException
  35.
             at org.drools.reteoo.LeftTuple.<init>(LeftTuple.java:135)
  36.
             at org.drools.reteoo.LeftTuple.<init>(LeftTuple.java:121)
  37.
             at org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarsha
  38.
      ller.java:461)
  39.
             at org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMars
  40.
      haller.java:351)
  41.
             at org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshall
  42.
      er.java:205)
  43.
             at org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarsh
  44.
      aller.java:91)
  45.
             at org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapsh
  46.
      ot(JPASessionMarshallingHelper.java:91)
  47.
             ... 12 more

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[JBoss JIRA] Created: (JBRULES-2681) Drools: Unable to load session snapshot