[jboss-user] [JBoss Seam] - java.lang.NoClassDefFoundError: org.drools.WorkingMemory and

Hello After 20 minutes of inactivity (I guess, session is being serialized after that), JBoss throws the following exception to console. The application is quite simple Seam one, containng one session-scoped component. No Drools are used explicitly, no jBPM. The only specific feature is Seam Remoting , but error appears even when no Remoting calls were made. Any idea what may cause that ? Thanks. 18:57:18,968 ERROR [TerminalAdmAction] problem passivation thread | javax.ejb.EJBException: Could not passivate; failed to save state | at org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager.passivateSession(StatefulSessionFilePersistenceManager.java:406) | at org.jboss.ejb3.cache.simple.SimpleStatefulCache.passivate(SimpleStatefulCache.java:301) | at org.jboss.ejb3.cache.simple.SimpleStatefulCache$SessionTimeoutTask.run(SimpleStatefulCache.java:209) | Caused by: | java.io.IOException | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:129) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.ArrayPersister.saveObjectArray(ArrayPersister.java:110) | at org.jboss.serial.persister.ArrayPersister.writeData(ArrayPersister.java:101) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.ArrayPersister.saveObjectArray(ArrayPersister.java:110) | at org.jboss.serial.persister.ArrayPersister.writeData(ArrayPersister.java:101) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:181) | at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | at org.jboss.serial.io.MarshalledObject.<init>(MarshalledObject.java:51) | at org.jboss.ejb3.stateful.StatefulBeanContext.writeExternal(StatefulBeanContext.java:842) | at org.jboss.serial.persister.ExternalizePersister.writeData(ExternalizePersister.java:58) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:181) | at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | at org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager.passivateSession(StatefulSessionFilePersistenceManager.java:390) | ... 2 more | Caused by: | java.lang.reflect.InvocationTargetException | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | at java.lang.reflect.Method.invoke(Method.java:615) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120) | ... 99 more | Caused by: | java.io.IOException | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:129) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60) | at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | at EDU.oswego.cs.dl.util.concurrent.CopyOnWriteArrayList.writeObject(CopyOnWriteArrayList.java:772) | ... 104 more | Caused by: | java.lang.reflect.InvocationTargetException | at sun.reflect.GeneratedMethodAccessor382.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | at java.lang.reflect.Method.invoke(Method.java:615) | at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120) | ... 116 more | Caused by: | java.lang.NoClassDefFoundError: org.drools.WorkingMemory | at java.lang.Class.getDeclaredFieldsImpl(Native Method) | at java.lang.Class.getDeclaredFields(Class.java:505) | at org.jboss.serial.classmetamodel.ClassMetaDataSlot.exploreFields(ClassMetaDataSlot.java:89) | at org.jboss.serial.classmetamodel.ClassMetaDataSlot.<init>(ClassMetaDataSlot.java:58) | at org.jboss.serial.classmetamodel.ClassMetaData.exploreSlots(ClassMetaData.java:411) | at org.jboss.serial.classmetamodel.ClassMetaData.<init>(ClassMetaData.java:138) | at org.jboss.serial.classmetamodel.ClassMetamodelFactory.getClassMetaData(ClassMetamodelFactory.java:350) | at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:168) | at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60) | at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | at java.util.Hashtable.writeObject(Hashtable.java:793) | ... 120 more View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4081712#... 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