[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
[
List Home]
|
Re: [eclipselink-users] PersistenceException problem
|
Hello John,
While Line 300 in RepeatableWriteUnitOfWork doesn't match up perfectly,
I suspect it is in the code catching an exception, marking the state as
incomplete, then rethrowing the exception. So we cannot tell what is
actually causing the NPE without the full stack trace . This might only
occur during certain query executions not because of the query itself,
but because the query forces a flush. The NPE is coming from the flush
operation required to ensure that the query operates and picks up the
changes made in the transaction so far. You might want to check what
you have changed in your transaction since that last query or flush.
Best Regards,
Chris
vrmerlin wrote:
While performing a query, I'm getting the following exception:
===============================
Specifics: javax.persistence.PersistenceException:
java.lang.NullPointerException
Stack trace: javax.persistence.PersistenceException:
java.lang.NullPointerException
at
org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:382)
at
org.eclipse.persistence.internal.jpa.EJBQueryImpl.performPreQueryFlush(EJBQueryImpl.java:936)
at
org.eclipse.persistence.internal.jpa.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:378)
at
org.eclipse.persistence.internal.jpa.EJBQueryImpl.getResultList(EJBQueryImpl.java:517)
at
iccs.services.system_manager.server.ProcessDataModel.getProgramByService(ProcessDataModel.java:299)
at
iccs.services.system_manager.server.SysMgrCentralImpl.get_Managed_Service_Ref(SysMgrCentralImpl.java:439)
at iccs.idl.Idl_Sys_Mgr.CentralPOA._invoke(CentralPOA.java:241)
at
org.jacorb.poa.RequestProcessor.invokeOperation(RequestProcessor.java:297)
at org.jacorb.poa.RequestProcessor.process(RequestProcessor.java:591)
at org.jacorb.poa.RequestProcessor.run(RequestProcessor.java:734)
Caused by: java.lang.NullPointerException
at
org.eclipse.persistence.internal.jpa.RepeatableWriteUnitOfWork.writeChanges(RepeatableWriteUnitOfWork.java:300)
at
org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:380)
... 9 more
===============================
I should add that this query runs successfully quite a few times, before
throwing this exception. Any ideas on what might be causing it?
Thanks,
John
