java.lang.NullPointerException
	at org.hibernate.engine.internal.StatefulPersistenceContext.clear(StatefulPersistenceContext.java:234)
	at org.hibernate.internal.SessionImpl.cleanupOnClose(SessionImpl.java:572)
	at org.hibernate.internal.AbstractSharedSessionContract.setClosed(AbstractSharedSessionContract.java:315)
	at org.hibernate.internal.AbstractSharedSessionContract.close(AbstractSharedSessionContract.java:308)
	at org.hibernate.internal.SessionImpl.close(SessionImpl.java:412)

   private static EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("JPA_PERSISTENCE_UNIT_NAME");

   @Test
    public void testHibernate() throws InterruptedException {
        run();
        run(); //exception thrown only for 2nd run
    }

    public void run() throws InterruptedException {
        EntityManager em = entityManagerFactory.createEntityManager();
        try {

            List<MyEntity> entities = em.createQuery("from MyEntity").getResultList();
            entities.parallelStream()
                    .forEach((e) -> {
                        //only happens when loading at least 2 different referenced entities
                        e.getReferencedEntity().getId();
                        e.getAnotherReferencedEntity().getId(); 
                    });
        } finally {
            em.close();
        }
    }

@Entity
@Table(name = "my_entity")
@Audited
public class MyEntity {
 
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private int id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "id_a")
    @Audited(targetAuditMode=RelationTargetAuditMode.NOT_AUDITED)
    private A referencedEntity;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "id_b)
    @Audited(targetAuditMode=RelationTargetAuditMode.NOT_AUDITED)
    private B anotherReferencedEntity;

    //Constructor, getters, setters

}