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Re: persisted stateful sessions and knowledge base changes
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created by <a href="http://community.jboss.org/people/calca">Demian Calcaprina</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/629929#629929">View the full discussion</a>
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<div class="jive-rendered-content"><p>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:</p><p>Caused by: java.lang.reflect.InvocationTargetException</p><p>        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)</p><p>        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)</p><p>         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)</p><p>        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)</p><p>        at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(KnowledgeStoreServiceImpl.java:88)</p><p>         ... 35 more</p><p>Caused by: java.lang.RuntimeException: Unable to load session snapshot</p><p>        at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:96)</p><p>        at org.drools.persistence.SingleSessionCommandService.initKsession(SingleSessionCommandService.java:193)</p><p>         at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:157)</p><p>        ... 40 more</p><p>Caused by: java.lang.NullPointerException</p><p>        at org.drools.common.ConcurrentNodeMemories.getNodeMemory(ConcurrentNodeMemories.java:65)</p><p>         at org.drools.common.AbstractWorkingMemory.getNodeMemory(AbstractWorkingMemory.java:1035)</p><p>        at org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:327)</p><p>        at org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:221)</p><p>         at org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:92)</p><p>        at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:91)</p><p>        ... 42 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Demian</p></div>
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