I am using jboss-4.0.4.CR2 version and received the following situation

I am trying to update object retrieved in previous phase.

em.merge(persons);

em.merge generates "insert" clause for persons (it is wrong behaviour of EJB3 Container) in case I define Persons with IdClass annotation

@IdClass(com.p5soft.seb.ejb.data.model.PersonsPK.class)
@Entity
@Table(name="PERSONS")
public class Persons implements Serializable {
...

And em.merge generates "update" clause for persons (it is CORRECT behaviour of EJB3 Container) in case I define Persons without IdClass annotation

@Entity
@Table(name="PERSONS")
public class Persons implements Serializable {

But I have composite primary key for Persons.
Is it possible to use merge for entities with @IdClass annotation?