0 Replies Latest reply on Jul 17, 2013 6:56 AM by abadr

Unable to get Session Snapshot

abadr Jul 17, 2013 6:56 AM

Hi,

I am new to JBPM and I am trying to build a stateful workflow process (stateless is working just fine) with two Email Tasks and one signal event (see attached file that includes the Java file and the bpmn file. When I try to start the process and when it reaches the wait state and try to save the current session, I get the following exceptions thrown (I tried to google this problem but with no success so far):

0 17/07 12:42:06,152[main] ERROR drools.persistence.SingleSessionCommandService.rollbackTransaction - Could not commit session

java.lang.RuntimeException: Unable to commit transaction

at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:182)

at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:376)

at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.startProcessInstance(CommandBasedStatefulKnowledgeSession.java:237)

at com.sample.UploadDocumentWorkflowProcessMain.main(UploadDocumentWorkflowProcessMain.java:79)

Caused by: javax.persistence.PersistenceException: java.lang.RuntimeException: Unable to get session snapshot

at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:516)

at bitronix.tm.BitronixTransaction.fireBeforeCompletionEvent(BitronixTransaction.java:478)

at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:193)

at bitronix.tm.BitronixTransactionManager.commit(BitronixTransactionManager.java:120)

at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:179)

... 3 more

Caused by: java.lang.RuntimeException: Unable to get session snapshot

at org.drools.persistence.SessionMarshallingHelper.getSnapshot(SessionMarshallingHelper.java:75)

at org.drools.persistence.info.SessionInfo.update(SessionInfo.java:85)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at org.hibernate.ejb.event.BeanCallback.invoke(BeanCallback.java:23)

at org.hibernate.ejb.event.EntityCallbackHandler.callback(EntityCallbackHandler.java:80)

at org.hibernate.ejb.event.EntityCallbackHandler.preUpdate(EntityCallbackHandler.java:65)

at org.hibernate.ejb.event.EJB3FlushEntityEventListener.invokeInterceptor(EJB3FlushEntityEventListener.java:41)

at org.hibernate.event.def.DefaultFlushEntityEventListener.handleInterception(DefaultFlushEntityEventListener.java:330)

at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:270)

at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:151)

at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219)

at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)

at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:49)

at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1028)

at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:366)

at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:504)

... 7 more

Caused by: java.io.NotSerializableException: org.drools.impl.StatefulKnowledgeSessionImpl

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)

at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)

at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)

at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)

at java.util.ArrayList.writeObject(ArrayList.java:710)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)

at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)

at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)

at org.drools.marshalling.impl.SerializablePlaceholderResolverStrategy$SerializablePlaceholderStrategyContext.write(SerializablePlaceholderResolverStrategy.java:97)

at org.drools.marshalling.impl.PersisterHelper.writeStrategiesIndex(PersisterHelper.java:209)

at org.drools.marshalling.impl.PersisterHelper.writeToStreamWithHeader(PersisterHelper.java:189)

at org.drools.marshalling.impl.ProtobufOutputMarshaller.writeSession(ProtobufOutputMarshaller.java:101)

at org.drools.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:169)

at org.drools.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:151)

at org.drools.persistence.SessionMarshallingHelper.getSnapshot(SessionMarshallingHelper.java:72)

... 25 more