Exception in NetBeans database app tutorial.

[Carolina355]

I'm doing the "Creating a Custom Java Desktop Database Application" NetBeans tutorial. There's a section called "Customizing the Master/Detail View". Everything is fine until I get to the end of that section. I've completed all the instructions and checked all the changes the instructions said to make. The instructions say that the application should run OK but without some of its functions. The program compiles fine but when I run it I get the following error messages:

Dec 17, 2008 12:08:56 PM org.jdesktop.application.Application$1 run
SEVERE: Application class customerrecords.CustomerRecordsApp failed to launch
javax.persistence.PersistenceException: No Persistence provider for EntityManager named MyBusinessRecordsPU: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory:
oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Local Exception Stack:
Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@11b86e7
Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed.
Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException
Exception Description: An incompatible mapping has been encountered between [class customerrecords.resources.Products] and [class customerrecords.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer.
at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:143)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:169)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at customerrecords.CustomerRecordsView.initComponents(CustomerRecordsView.java:337)


The exception is triggered by the line of code referenced in the last line of the above messages, i.e. CustomerRecordsView.java:337. I guess the problem is something about the mapping between two of my entity classes, especially since this mapping was manually modified as part of the tutorial. I've checked the edits that are supposed to create the mapping. But I don't know enough Java or NetBeans to find the problem.

Anyone else had this problem or can give me any ideas?

I'm running NetBeans 6.5 IDE with all updates as of this date.
Windows XP Pro
Java 1.6.0_10

Thanks.

[yangseng]

Hi,

I think i have the same problem as you. Did you manage to solve it?
If yes can you tell what's the solution.
Thanks in advance,

Nuno

[K1]

[kororos]

I am having exactly the same problem... please help.