我有这两个实体

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

    private long id;
    private List<CallParticipant> members;



    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }


    @OneToMany(mappedBy = "callSession", fetch = FetchType.LAZY)
    public List<CallParticipant> getMembers() {
        return members;
    }

    public void setMembers(List<CallParticipant> members) {
        this.members = members;
    }

}



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


    private long id;
    private CallSession callSession;
  


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    @ManyToOne
    public CallSession getCallSession() {
        return callSession;
    }

    public void setCallSession(CallSession callSession) {
        this.callSession = callSession;
    }

}

但是当我调用CallSession.getMembers()方法时，我会得到以下异常:

无法计算引发“Org.Hibernate.LazyInitializationException”异常的表达式方法。

我搞不懂为什么会出现这个错误？ 为什么会出现这个错误，如何修复？