Hibernate willingly loads a lazy link

I have three objects A, B and C.

@Entity
public class A {
  @Id
  private long id;

  @OneToOne(fetch = FetchType.EAGER)
  @JoinColumn(name = "ID", insertable = false, updatable = false)
  public B b;
}

@Entity
public class B {
  @Id
  private long id;

  @OneToOne(fetch = FetchType.LAZY)
  @JoinColumn(name = "ID", insertable = false, updatable = false)
  public C c;
}

@Entity
public class C {
  @Id
  private long id;

  @OneToOne(fetch = FetchType.LAZY)
  @JoinColumn(name = "ID", insertable = false, updatable = false)
  public B b;
}

      

        
        
        
      

    

So there is a loaded link B in A, and there is a lazy loaded bi-directional relationship between B and C.

My problem: When retrieving instance A from DB, instance C is also fetched using Hibernate.

I found it in a heap dump due to a memory leak and tested it programmatically:

@Test
public void eagerAndLazyLoading() {
  A a = dao.getA(1L);

  Assert.assertNotNull(a);

  PersistenceUnitUtil puu = emf.getPersistenceUnitUtil();

  Assert.assertTrue(puu.isLoaded(a));
  Assert.assertTrue(puu.isLoaded(a, "b"));
  Assert.assertFalse(puu.isLoaded(a.b, "c"));
}

      

        
        
        
      

    

This last Assert fails.

Fortunately, there was no problem getting rid of the bidirectional relationship, but I would like to know the source of the problem. Is it the intended behavior of Hibernate to eagerly load all references to an object that is eagerly loaded?