@Entity
@Inheritance(strategy = InheritanceType.JOINED)
abstract class A {
  @XmlInverseReference(mappedBy = "b")
  @XmlInverseReference(mappedBy = "c") //ERROR
  @ManyToOne
  D d;
}

@Entity
@XmlDiscriminatorValue("B")
@DiscriminatorValue("B")
class B extends A {
  //...
}

@Entity
@XmlDiscriminatorValue("C")
@DiscriminatorValue("C")
class C extends A {
  //...
}

class D {
    @OneToMany(fetch = FetchType.EAGER, cascade = ALL, orphanRemoval = true, mappedBy = "d")
    List<B> b;

    @OneToMany(fetch = FetchType.EAGER, cascade = ALL, orphanRemoval = true, mappedBy = "d")
    List<C> c;
}