@Entity
public class Parent implements Serializable{
    @Id @GeneratedValue @Column(name="PARENT_ID")
    private int id;
    @Version
    private int version;
    @Basic(fetch = FetchType.EAGER)
    @Column(name="PARENT_AGE")
    private int age;
    
    @OneToMany (mappedBy="parent", fetch=FetchType.LAZY)
    private Collection<Child> children;
}

@Entity
public class Child implements Serializable{
    @Id @GeneratedValue  @Column(name="CHILD_ID")
    private int id;
    @Version
    private int version;
    @Basic(fetch = FetchType.EAGER)
    @Column(name="CHILD_AGE")
    private int age;
    
    @ManyToOne(fetch = FetchType.LAZY)
    private Parent parent;
}

    EntityGraph<Parent> eg = em.createEntityGraph(Parent.class);
    eg.addAttributeNodes("children");
    eg.addSubgraph("children", Child.class).addAttributeNodes("parent");
    
    em.getTransaction().begin();
    Query query = em.createQuery("SELECT a FROM Parent a", Parent.class);
    query.setHint("javax.persistence.fetchgraph", eg);
        
    Parent parent = (Parent) query.getResultList().get(0);