ClassCastException in Javassist /CGLib

[gquintana]

I am following the A to B relationship (many to one) where B is abstract and the relationship lazy, I get a ClassCastException:

java.lang.ClassCastException: com.mycompany.myproject.MyEntityB_$$_javassist_1
at com.mycompany.myproject.MyEntityB_$$_javassist_1.getMyEntityB1(EntiteB_$$_javassist_1.java)
at com.mycompany.myproject.MyServiceImpl.getMyEntityB1FromA(MyServiceImpl.java:68)

I tried to replace Javassist by CGLib but I got the same:

java.lang.ClassCastException: com.mycompany.myproject.MyEntityB$$EnhancerByCGLIB$$22ea3be1
at com.mycompany.myproject.MyEntityB$$EnhancerByCGLIB$$22ea3be1.getMyEntityB1(<generated>)
at com.mycompany.myproject.MyServiceImpl.getMyEntityB1FromA(MyServiceImpl.java:68)

Here are my entities:

@Entity
public class MyEntityA {
 @Id
 private int id;
 private String name;
 @ManyToOne(fetch=FetchType.LAZY)
 private MyEntityB myEntityB;
 ...
}
@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public abstract class MyEntityB {
 @Id
 private int id;
 private String name;
 @OneToMany(mappedBy="MyEntityB")
 private List<MyEntityA> myEntitiesA=new ArrayList<MyEntityA>();
 ...
}
@Entity
public class MyEntityB1 extends MyEntityB {
 @OneToMany(mappedBy="myEntityB1")
 private List<MyEntityB2> myEntitiesB2=new ArrayList<MyEntityB2>();
 ...
}
@Entity
public class MyEntityB2 extends MyEntityB {
 @ManyToOne
 private MyEntityB1 myEntityB1;
 ...
}

Can you tell me where I am wrong?

[gquintana]

I found similar problem in Hibernate forum, but still no clean solution:
http://forum.hibernate.org/viewtopic.php?p=2371113