Hi,

my intention is to extend one entity bean from another using the JOINED stategey. I have a very simple setup, which produces the following exception:

jectName: persistence.units:ear=calc.ear,jar=calc.jar,unitName=userDatabase
State: FAILED
Reason: org.hibernate.AnnotationException: Unable to define/override @Id(s) on a subclass: de.test.Client
I Depend On:
jboss.jca:service=ManagedConnectionFactory,name=calcDS
Depends On Me:
jboss.j2ee:ear=calc.ear,jar=calc.jar,name=RegisterAction,service=EJB3

Here is the source code of the two entity beans:

@Entity
@Inheritance(strategy= InheritanceType.JOINED)
public class Person
{
@Id
public String lastname;

String firstName;
String street;
String zipcode;
String city;
String country;
String phone;
...
}


@Entity
public class Client extends Person
{
@Id
String hostname;

String email;
String customernumber;
...
}

Why is this not working?