FetchAllTopicList Error

[fankane]

Version：v2.1.2

	a, err := admin.NewAdmin(admin.WithResolver(primitive.NewPassthroughResolver(nameServerAddrs)))
	if err != nil {
		return nil, fmt.Errorf("new admin err:%s, addr:%v", err, nameServerAddrs)
	}
        res, err := a.FetchAllTopicList(ctx) //会报错
	if err != nil {
		return nil, err
	}

        a.CreateTopic(ctx, opts...)  // 成功

当 namseServerAddrs 是 []string{ "http://docker.svc.cluster.local:9876" } 时，FetchAllTopicList 报错， CreateTopic 成功
当 namseServerAddrs 是 []string{ "127.0.0.1:9876" } 时，FetchAllTopicList 成功，CreateTopic 成功