[jboss-user] [jBPM] - Re: persisted stateful sessions and knowledge base changes

[Demian Calcaprina]

Demian Calcaprina [http://community.jboss.org/people/calca] created the discussion

"Re: persisted stateful sessions and knowledge base changes"

To view the discussion, visit: http://community.jboss.org/message/629929#629929

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Hi Maciej. Yes, it is a similar case than mine too. I have (for now, changing it) one session which I reload everytime I start the app, and I have an agent to rebuild my knowledge base. From time to time, I am facing a similar exception when loading the session, which I think it is caused to some changes in kbase:
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(KnowledgeStoreServiceImpl.java:88)
         ... 35 more
Caused by: java.lang.RuntimeException: Unable to load session snapshot
        at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:96)
        at org.drools.persistence.SingleSessionCommandService.initKsession(SingleSessionCommandService.java:193)
         at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:157)
        ... 40 more
Caused by: java.lang.NullPointerException
        at org.drools.common.ConcurrentNodeMemories.getNodeMemory(ConcurrentNodeMemories.java:65)
         at org.drools.common.AbstractWorkingMemory.getNodeMemory(AbstractWorkingMemory.java:1035)
        at org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:327)
        at org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:221)
         at org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:92)
        at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:91)
        ... 42 more

Thanks,

Demian
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