问无法持久化具有延迟加载元素的实体

EN

@Entity public class A implements Serializable {
    @OneToMany(mappedBy = "a", fetch = FetchType.LAZY)
    private List<B> bList;
}

@Entity public class B implements Serializable{
    @JoinColumn(name = "A_ID", referencedColumnName = "ID")
    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    private A a;

    @JoinColumn(name = "C_ID", referencedColumnName = "ID", nullable = false)
    @OneToOne(cascade = CascadeType.ALL, optional = false, fetch = FetchType.EAGER)
    private C c;
}

@Entity public class C implements Serializable {
    @OneToOne(cascade = CascadeType.ALL, mappedBy = "c", fetch = FetchType.EAGER)
    private B b;
}