Borland Enterprise Server and TopLink

Question

Hi,
I've made an object model persistent using JDO. A client uses the objects via a stateful session bean (SessionFacade) which is deployed to a Borland Enterprise Server. The bean initializes the TopLinkProject (a java-export of the workbench) the following way:
Session session = (new TopLinkProject()).createDatabaseSession();
// Build a JDO PersistenceManagerFactory using the session.
JDOPersistenceManagerFactory factory =
new JDOPersistenceManagerFactory(session);
// Get the PersistenceManager. this will login to the database.
setManager(factory.getPersistenceManager());
// Enable logging
( (JDOPersistenceManager) getManager()).getSession().logMessages();
Connection works fine, retrieving objects from database too. But when I try to make a newly created object of the model persistent (getManager().makePersistent(object)), I recieve a ClassCastException:
java.rmi.ServerException: java.rmi.RemoteException: null; nested exception is:
     java.lang.ClassCastException
     at com.inprise.ejb.EJBHome$RemoteStrategyImpl.getSystemException(EJBHome.java:851)
     at com.inprise.ejb.Dispatcher.doInvoke(Dispatcher.java:1407)
     at com.inprise.ejb.Dispatcher.invokeSecurityCheck(Dispatcher.java:1023)
     at com.inprise.ejb.Dispatcher.invoke(Dispatcher.java:816)
     at com.inprise.ejb.Dispatcher.invoke(Dispatcher.java:595)
     at com.inprise.ejb.EJBHome.dispatcherInvokeBeanMethod(EJBHome.java:55)
     at com.inprise.ejb.EJBHome$ComponentInterfaceMethodCache.invokeDispatcherMethod(EJBHome.java:1460)
     at com.inprise.ejb.EJBHome.invokeDispatcherMethod(EJBHome.java:34)
     at com.inprise.ejb.Dispatcher.invoke(Dispatcher.java:416)
     at com.semture.pdm.sessionserver.beans.SessionFacadePOAInvokeHandler.createPart(SessionFacadePOAInvokeHandler.java:182)
     at com.semture.pdm.sessionserver.beans.SessionFacadePOAInvokeHandler.createPart(SessionFacadePOAInvokeHandler.java:283)
     at com.semture.pdm.sessionserver.beans.SessionFacadePOA._invoke(SessionFacadePOA.java:144)
     at com.semture.pdm.sessionserver.beans.SessionFacadePOA._invoke(SessionFacadePOA.java:53)
     at com.inprise.vbroker.poa.POAImpl.invoke(POAImpl.java:2693)
     at com.inprise.vbroker.poa.ActivationRecord.invoke(ActivationRecord.java:109)
     at com.inprise.vbroker.poa.ServerInterceptorManager$ARWrapper.invoke(ServerInterceptorManager.java:110)
     at com.inprise.vbroker.GIOP.GiopProtocolAdapter.doRequest(GiopProtocolAdapter.java:824)
     at com.inprise.vbroker.IIOP.ServerProtocolAdapter.doRequest(ServerProtocolAdapter.java:68)
     at com.inprise.vbroker.GIOP.GiopProtocolAdapter.dispatchMessage(GiopProtocolAdapter.java:1106)
     at com.inprise.vbroker.orb.TPDispatcherImpl$TPDispatcher.run(TPDispatcherImpl.java:106)
     at com.inprise.vbroker.orb.ThreadPool$PoolWorker.run(ThreadPool.java:76)
Caused by: java.lang.ClassCastException
     at oracle.toplink.internal.indirection.TransparentIndirectionPolicy.buildBackupClone(Unknown Source)
     at oracle.toplink.internal.indirection.TransparentIndirectionPolicy.backupCloneAttribute(Unknown Source)
     at oracle.toplink.mappings.ForeignReferenceMapping.buildBackupClone(Unknown Source)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildBackupClone(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.synchronizeAndResume(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitAndResume(Unknown Source)
     at oracle.toplink.jdo.JDOTransaction.commit(Unknown Source)
     at oracle.toplink.jdo.JDOPersistenceManager.makePersistent(Unknown Source)
     at com.semture.pdm.sessionserver.persistence.TopLinkAdapter.storeObject(TopLinkAdapter.java:150)
     at com.semture.pdm.sessionserver.persistence.PersistenceManager.makePersistent(PersistenceManager.java:97)
     at com.semture.pdm.sessionserver.persistence.PersistentObject.makePersistent(PersistentObject.java:49)
     at com.semture.pdm.sessionserver.cm.Version.init(Version.java:97)
     at com.semture.pdm.sessionserver.bo.Factory.initBusinessObject(Factory.java:68)
     at com.semture.pdm.sessionserver.bo.Factory.createPart(Factory.java:25)
     at com.semture.pdm.sessionserver.beans.SessionFacadeBean.createPart(SessionFacadeBean.java:212)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.inprise.ejb.ConcreteMethod.invoke(ConcreteMethod.java:32)
     at com.inprise.ejb.EJBContext.invoke(EJBContext.java:166)
     at com.inprise.ejb.Dispatcher.doInvoke(Dispatcher.java:1301)
Outside the BES all works fine, including object creation. Could it be, that Toplink uses a wrong ClassLoader inside the BES? It would be great if anybody can help.
TIA
STeffen

Answer 1

It doesn't seem to be a class loader issue, at least directly, seems to be related to usage of transparent indirection.
What is the state of the object that you are making persistent, how is it related to other objects. Does makePersistent work for simple objects? Try switching the 1-m from transparent no no-indirection or valueholders to see if it fixes the problem.