I am doing a mapping to a class which is extended by few classes in a heirarchical manner and some are referenced by other classes. And there are 43 classes which are related to each other and the class diagram looks like a pyramid. And i am trying to build a session factory after adding all 43 classes and i get the following stack trace :

java.lang.ArrayIndexOutOfBoundsException: 1
at net.sf.hibernate.persister.EntityPersister.initPropertyPaths(EntityPersister.java:918)
at net.sf.hibernate.persister.EntityPersister.initPropertyPaths(EntityPersister.java:892)
at net.sf.hibernate.persister.EntityPersister.postInstantiate(EntityPersister.java:113)
at net.sf.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:223)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:627)
at com.bunge.bgm.contract.business.domain.ContractMain.configure(ContractMain.java:124)
at com.bunge.bgm.contract.business.domain.ContractMain.main(ContractMain.java:692)

If anyone has encountered such error condition, please reply. I am trying to isolate the problem but till now no use. I am confused about the direction i have to go to solve it. I am trying. If anyone can suggest something, it will be a great help. Thanks in advance.

The first step would be to turn Hibernate logging to DEBUG level so that we can see which mapping file Hibernate is parsing when the error is encountered. Post the logging output. And post the relevent mapping.

well, maybe its so obvious that it won't help much, but just try persisting one class at a time, and even for that one class, persist first only the id field, then progressively all the rest. you don't need to put all the properties you want to persist at once in the xml mapping files (or in the xdoclet tags, if you use that)