Hi,

First, sorry for my (bad) english

I have the next scenario:
1.- Extract DB schema with middlegen 2.1 (hibernate plugin): About 390 hbm.xml files).
2.-Gen java classes with Hbm2JavaTask (Hibernate 3.0.5 production version)
3.- Gen hibernate.cfg.xml with HibernateConfigFileTask
4.- Replace all "hibernate-mapping-2.0.dtd" with "hibernate-mapping-3.0.dtd" in all hbm.xml files and setting property default-lazy with false.

Then run a simple program test like this:
...
Configuration c = new Configuration(); //0 seconds
c.configure(); //13 seconds
SessionFactory sFactory = c.buildSessionFactory();
Session session = sFactory.openSession();
session.close();
...
During buildSessionFactory appears this exception: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
(My xms settings is -Xmx256m -Xms128m)

(I use cglib-2.1_2.jar)

Using a profiler I can see more than 1.700.000 instances of class[] in memory, I think garbage collector can't evict it. I have read in previous topics of this forum (and in cglib's forums and in others... ) but the answers doesn't help me. I changed property hibernate.cglib.use_reflection_optimizer to false and the result is the same.

What can I do?

My db is Oracle9.2i
There s no code betwen open and close session.
Exception hasn't stack trace.
No sql generated.
Debug level=warn

Thanks





Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

Hibernate version:

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

Do you see 1.700.000 generated class instances with names like $$CGLIB$$ ?

No, there are 1.700.000 instances of classes's Arrays (Class[])

There are only about 800 class with names like com.mypackage.Mitable$$FastClassByCGLIB$a1bd2b70

sorry, there are 800 instances of my specific row classes (com.mypackage.mytable),
I supousse that the classes's array are full of classes of type $$CGLIB, but I don't know how can I discover that my profile.

If we assume the arrays al full of $$CGLIB classes how can I fix it?

Thanks

This stuff must be referenced by some dynamic data structure like map or list, find it (it will contain very large array or many "Entry" objects). And try to find it without any assumptions.

You were right, better do not assumptions, sorry.

I debug throught hibernate classes and I discover that the fatidic point is in SessionFactoryImpl

// after *all* persisters and named queries are registered
Iterator iter = entityPersisters.values().iterator();
while ( iter.hasNext() ) {
( (EntityPersister) iter.next() ).postInstantiate();
}
iter = collectionPersisters.values().iterator();
while ( iter.hasNext() ) {
( (CollectionPersister) iter.next() ).postInstantiate(); <------------
}


Memory leak appearrs inside this, but I didn't found where are created the evil classes's array. Can you tell me a class where I must investigate?

Thanks baliukas and sorry for my silly questions I undestand your work is dificult with so few descriptions