[jboss-user] [JBoss Seam] - Exception in JBoss console, the root is java.lang.NoClassDef

Hello After deploying some Seam applications to JBoss on my local PC, occasionally the following exception is being printed to the console (even when no applications are actually used): | 14:26:04,109 ERROR [STDERR] java.lang.reflect.InvocationTargetException | 14:26:04,109 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor295.invoke(Unknown Source) | 14:26:04,109 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | 14:26:04,109 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:615) | 14:26:04,125 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120) | 14:26:04,140 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86) | 14:26:04,140 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,140 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,140 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60) | 14:26:04,750 ERROR [STDERR] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | 14:26:04,750 ERROR [STDERR] at java.util.HashMap.writeObject(HashMap.java:1040) | 14:26:04,750 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor285.invoke(Unknown Source) | 14:26:04,750 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | 14:26:04,750 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:615) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,750 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.ArrayPersister.saveObjectArray(ArrayPersister.java:110) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.ArrayPersister.writeData(ArrayPersister.java:101) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:181) | 14:26:04,765 ERROR [STDERR] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.io.MarshalledObject.<init>(MarshalledObject.java:51) | 14:26:04,765 ERROR [STDERR] at org.jboss.ejb3.stateful.StatefulBeanContext.writeExternal(StatefulBeanContext.java:405) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.ExternalizePersister.writeData(ExternalizePersister.java:58) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:181) | 14:26:04,765 ERROR [STDERR] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | 14:26:04,765 ERROR [STDERR] at org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager.passivateSession(StatefulSessionFilePersistenceManager.java:347) | 14:26:04,765 ERROR [STDERR] at org.jboss.ejb3.cache.simple.SimpleStatefulCache.passivate(SimpleStatefulCache.java:196) | 14:26:04,765 ERROR [STDERR] at org.jboss.ejb3.cache.simple.SimpleStatefulCache$SessionTimeoutTask.run(SimpleStatefulCache.java:129) | 14:26:04,765 ERROR [STDERR] Caused by: | 14:26:04,765 ERROR [STDERR] java.io.IOException | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:129) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.ArrayPersister.saveObjectArray(ArrayPersister.java:110) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.ArrayPersister.writeData(ArrayPersister.java:101) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,765 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,796 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,796 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,796 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,796 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,812 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,812 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,812 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,812 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,828 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,828 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,828 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,828 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,843 ERROR [STDERR] at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60) | 14:26:04,843 ERROR [STDERR] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | 14:26:04,843 ERROR [STDERR] at java.util.LinkedList.writeObject(LinkedList.java:770) | 14:26:04,843 ERROR [STDERR] ... 50 more | 14:26:04,843 ERROR [STDERR] Caused by: | 14:26:04,859 ERROR [STDERR] java.lang.reflect.InvocationTargetException | 14:26:04,859 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | 14:26:04,859 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) | 14:26:04,859 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | 14:26:04,859 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:615) | 14:26:04,890 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120) | 14:26:04,890 ERROR [STDERR] ... 106 more | 14:26:04,890 ERROR [STDERR] Caused by: | 14:26:04,890 ERROR [STDERR] java.io.IOException | 14:26:04,890 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:129) | 14:26:04,906 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86) | 14:26:04,906 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,906 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,906 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,921 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182) | 14:26:04,921 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90) | 14:26:04,921 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62) | 14:26:04,921 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60) | 14:26:04,937 ERROR [STDERR] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | 14:26:04,937 ERROR [STDERR] at EDU.oswego.cs.dl.util.concurrent.CopyOnWriteArrayList.writeObject(CopyOnWriteArrayList.java:772) | 14:26:04,937 ERROR [STDERR] ... 111 more | 14:26:04,937 ERROR [STDERR] Caused by: | 14:26:04,937 ERROR [STDERR] java.lang.reflect.InvocationTargetException | 14:26:04,937 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor284.invoke(Unknown Source) | 14:26:04,937 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | 14:26:04,937 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:615) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120) | 14:26:04,937 ERROR [STDERR] ... 123 more | 14:26:04,937 ERROR [STDERR] Caused by: | 14:26:04,937 ERROR [STDERR] java.lang.NoClassDefFoundError: org.jbpm.graph.exe.ProcessInstance | 14:26:04,937 ERROR [STDERR] at java.lang.Class.getDeclaredFieldsImpl(Native Method) | 14:26:04,937 ERROR [STDERR] at java.lang.Class.getDeclaredFields(Class.java:505) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetaDataSlot.exploreFields(ClassMetaDataSlot.java:89) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetaDataSlot.<init>(ClassMetaDataSlot.java:58) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetaData.exploreSlots(ClassMetaData.java:411) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetaData.<init>(ClassMetaData.java:138) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.classmetamodel.ClassMetamodelFactory.getClassMetaData(ClassMetamodelFactory.java:350) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:168) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206) | 14:26:04,937 ERROR [STDERR] at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60) | 14:26:04,937 ERROR [STDERR] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:320) | 14:26:04,937 ERROR [STDERR] at java.util.Hashtable.writeObject(Hashtable.java:793) | 14:26:04,937 ERROR [STDERR] ... 127 more | Looking at root cause, I suppose this is something jbpm-related, but how to catch the reason ? 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