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Problem creating WebSphere 7 EntityManagerFactory

I am working on a maven project that uses seam 2.2.0, hibernate 3.5.0-CR-2 as the JPA provider, DB2 as the database server, and Websphere 7 as the application server. Now I am facing the following problem:

  • In my EJBs, which are also considered SEAM components, I want to use the EntityManager from the EJB container (@PersistenceContext private EntityManager em), not the Seam EntityManager (@In private EntityManager em). But this is a problem, I cannot get EntityManager using @PersistenceContext.

In server logs, this means that it cannot create an EntityManagerFactory and receives a ClassCastException:

java.lang.ClassCastException: org.hibernate.ejb.HibernatePersistence is incompatible with javax.persistence.spi.PersistenceProvider

After much debugging and searching the forums, I assume that the problem is that Websphere is not using the Hibernate JPA provider.

Has anyone encountered this problem and have a solution? I configured the initial WAS class bootloader for my application to load classes with the application class loader first, and I packed all the necessary jars in the ears of the application, as written in: WAS InfoCenter: EJB 3.0 development features . If necessary, I will publish my persistence.xml, components.xml and stack trace files.

I found this problem discussed here:

Any hint would be helpful.
Thanks in advance! Michaela

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, JPA API EAR. "parent last" ( " " ) javax.persistence.spi.PersistenceProvider, , WAS. EAR, " ".

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Source: https://habr.com/ru/post/1609663/

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