EclipseLink JTA Persistence issue (Null Pointer Exception)

Question

I have two entities working in Mater Detail pattern like i describe in:

Stackoverflow Post: jpa-eclipselink-onetomany-derived-ids-fail

The pattern works as expected with LOCAL RESOURCE, but when i try to move the example to a web environment GlassFish4.1 (JSF) with JTA, i get the following error:

Advertencia: DTX5014: Caught exception in beforeCompletion() callback: java.lang.NullPointerException at entidades.OrderItemPK._persistence_set(OrderItemPK.java)

The source code for persistence class:

import java.util.List;
import javax.persistence.Query;
import javax.persistence.EntityManager;
import java.util.List;
import javax.persistence.Query;
import javax.persistence.EntityManager;


public abstract class AbstractFacade<T> {

    private Class<T> entityClass;
    protected abstract EntityManager getEntityManager();    

    public AbstractFacade(Class<T> entityClass) {
    this.entityClass = entityClass;
    }

    public void create(T entity) {
    getEntityManager().persist(entity);
    }

    public T edit(T entity) {
    return getEntityManager().merge(entity);
    }

    public void remove(T entity) {
    getEntityManager().remove(getEntityManager().merge(entity));
    }

I tried with both methods create and edit. Any idea what I'm doing wrong, suggestions are welcome.

Answer 1

The problem was in the PK class, change the data type int to Integer and then the error appeared on the method hashCode()