Hi,

i have some very strange problems lately, since I migrated my project to hibernate:

I get strange "NoClassDefFoundError"s, but the requested class is definitely compiled and in the classpath.
I am not shure wether this is a hibernate problem, a Intellij IDEA problem or a Mac OS X VM problem.

Anyone ever heard of something similar?

This is on Mac OS X 10.3, using 1.4.2, IDEA 4.0 and hibernate 2.13.

Here is a stacktrace:

java.lang.NoClassDefFoundError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at net.sf.hibernate.persister.AbstractEntityPersister.instantiate(AbstractEntityPersister.java:353)
at net.sf.hibernate.impl.SessionImpl.instantiate(SessionImpl.java:1773)
at net.sf.hibernate.impl.SessionImpl.instantiate(SessionImpl.java:1765)
at net.sf.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:502)
at net.sf.hibernate.loader.Loader.getRow(Loader.java:426)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:209)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:915)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:890)
at net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:93)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3259)
at net.sf.hibernate.collection.PersistentCollection.forceInitialization(PersistentCollection.java:336)
at net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(SessionImpl.java:3114)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:836)
at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:856)
at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:59)
at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:51)
at net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:419)
at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:2106)
at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1980)
at net.sf.hibernate.impl.SessionImpl.get(SessionImpl.java:1916)
at de.webjazz.pleasure.backend.persist.PersistHelper.load(PersistHelper.java:227)
at de.webjazz.pleasure.backend.CustomerFactory.createFullModel(CustomerFactory.java:20)
at de.webjazz.pleasure.application.FullModelLoader$1.run(FullModelLoader.java:34)

Regards,

Alex

Not enough informations with your trace.
But I think it's Jar path problem.

Hi,

surely sounds like it.

BUT: That compiled class is inside my build/classes dir where all other classes remain as well.

Regards,

Alex

But what kind of application do you create J2EE, standalone?
And your app server JBoss? Tomcat?

This a standalone Swing App.

Could you give me a more detailed stacktrace please?

Hi,

there is not much more stacktracing: I get the same error when instanciating the class manually.

I just tried, if the same behavior appears when I use the latest Developer Preview Java 1.4.2 Upg2 from Apple.
But I found this a very buggy version, which renders my Application an also Intellij IDEA useless.
But the problem is still there.

Here is a little more description:

All of a sudden one of my Model Classes seem to be invisible by the VM.
Every effort to create an instance of it throws an "NoClassDefFoundError".

When I rename some of the properties, try creating an instance from the "main" Thread, rebuild the whole project ... All of a sudden the class is visible again. There is definitely no rule to find.

I start believing in a VM-Bug.

Regards,

Alex

If you are using HibernateUtil from the reference documentation, read this thread: http://forum.hibernate.org/viewtopic.php?t=931482

Here is some more info:

java.lang.NoClassDefFoundError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at net.sf.hibernate.persister.AbstractEntityPersister.instantiate(AbstractEntityPersister.java:353)
at net.sf.hibernate.impl.SessionImpl.instantiate(SessionImpl.java:1773)
at net.sf.hibernate.impl.SessionImpl.instantiate(SessionImpl.java:1765)
at net.sf.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:502)
at net.sf.hibernate.loader.Loader.getRow(Loader.java:426)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:209)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:915)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:890)
at net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:93)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3259)
at net.sf.hibernate.collection.PersistentCollection.forceInitialization(PersistentCollection.java:336)
at net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(SessionImpl.java:3114)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:836)
at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:856)
at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:59)
at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:51)
at net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:419)
at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:2106)
at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1980)
at net.sf.hibernate.impl.SessionImpl.get(SessionImpl.java:1916)
at de.webjazz.pleasure.backend.persist.PersistHelper.load(PersistHelper.java:227)
at de.webjazz.pleasure.backend.CustomerFactory.createFullModel(CustomerFactory.java:20)
at de.webjazz.pleasure.application.FullModelLoader$1.run(FullModelLoader.java:34)

or here when creating an instance of that class "manually":

apple.awt.EventQueueExceptionHandler Caught Throwable : java.lang.NoClassDefFoundError
java.lang.NoClassDefFoundError
at de.webjazz.pleasure.backend.model.customer.impl.CustomerModelImpl.createProcedure(CustomerModelImpl.java:236)
at de.webjazz.pleasure.order.tree.OrderTreeController$CreateAction.actionPerformed(OrderTreeController.java:122)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1819)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1872)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:247)
at java.awt.Component.processMouseEvent(Component.java:5100)
at java.awt.Component.processEvent(Component.java:4897)
at java.awt.Container.processEvent(Container.java:1569)
at java.awt.Component.dispatchEventImpl(Component.java:3615)
at java.awt.Container.dispatchEventImpl(Container.java:1627)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
at java.awt.Container.dispatchEventImpl(Container.java:1613)
at java.awt.Window.dispatchEventImpl(Window.java:1606)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:481)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:178)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:170)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

Here is the code from CustomerModelImpl:

public ProcedureModel createProcedure(ProcedureState state) {
ProcedureModelImpl m = new ProcedureModelImpl();
m.setCustomer(this);
m.setState(state);
return m;
}

The following is now 100% reproducable:
If I create an instance of this class in the "main" Thread:

public static void main(String[] args) {
ProcedureModelImpl m = new ProcedureModelImpl(); // Dummy

_log.info("Application starting");
AppUtilities.setLookAndFeel();
new VersionChecker();
new StartupController();
}

Everything seems fine. No errors.
But if I remove the firstline I get the above errors.

Very strange ...

I'm not sure but your error seems come from Java 3D with OSx.
Make sure that you have this class in your classpath
apple.awt.EventQueueExceptionHandler.

I never work with your configuration so I can't help you so much sorry.
But try with a standalone command line client.

Problem solved!

If anyone is interested:

In my code I was calling a hibernate lookup inside my default constructor.
So what happened was: Hibernate actualy creates a first instance of my modelclass to verify reflection. (I didn't know that.) This first constuctor leaded to a roundtrip loop as it was trying to start hibernate to get some default values.
This must have confused the classloader, which lateron declared this class as not existent!

...