@Entity
@NamedQueries({
        @NamedQuery(name = "PersonType.selectAll",
                query = "SELECT a" +
                        "  FROM EntityA a"),
})
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class EntityA {
    @Id
    @GeneratedValue
    private Long id;

    private String name;

    @ManyToOne
    private EntityB entityB;
}

@Entity
@BatchSize(size = 500)
public class EntityB {
    @Id
    @GeneratedValue
    private Long id;

    private String name;
}

EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();

List<EntityA> aList =
        entityManager.createNamedQuery("PersonType.selectAll", EntityA.class)
                .getResultList();

entityManager.getTransaction().commit();
entityManager.close();

Assert.assertEquals(1, aList.size());
Assert.assertEquals("B1", aList.get(0).getEntityB().getName()); // LazyInitializationException