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Hibernate version:

EntityManager 3.2.0GA

Mapping documents:

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

Full stack trace of any exception that occurs:
Exception thrown : javax.persistence.PersistenceException: No Persistence provider for EntityManager named healthClubMembers
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
at org.myhealthclub.transaction.utility.EntityManagerUtility.getEntityManager(EntityManagerUtility.java:19)

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:


Problems with Session and transaction handling?

Read this: http://hibernate.org/42.html


My problem is this. I have a proper J2EE Application structure /project (Using Eclipse WTP 1.5). Where I have an EAR Project a Web Project and a "utility" Java Project. I do all the "JPA stuff" in the Java Project. When the web project invokes logic from the Java Project, based on the exception I am getting I believe the persistence.xml is not being found. Yet if I put all the code in the Web Project things work fine.

The reason I want to separate and put all the JPA stuff in a separate Java project, is because it is "utility" code, that I want to use across multiple other J2EE modules, Web, EJB, etc. I don't want all this logic collapsed into a single Web Module. However, unless I do so, it seems that the classloaders, or whatever can't find the persistence.xml.

Any ideas, is this a known bug. By the way out of interest, this same behaviour/problem exists with the Toplink JPA reference implementation as well (although the exception is different).

your app server is messing around and we probably can't extract the jar name.
Every JPA implementation do more or less


If it returns nothing in your app server, you won't make it work