改造并未显示出对响应的任何反应

Question

我在我的android项目中使用了Retrofit库。对于某些请求，改造不会获得已发送请求的响应，甚至不会抛出TimeoutException，但我们的api日志显示响应已发送。这是我的代码：

APIClient：

public class ApiClient {
    private static String baseUrl;
    private static Retrofit sRetrofit = null;
    private static boolean isURLChanged;
    public static Retrofit getClient() {
        if (sRetrofit == null || isURLChanged) {
            final OkHttpClient okHttpClient = new OkHttpClient.Builder()
                    .retryOnConnectionFailure(true)
                    .readTimeout(120, TimeUnit.SECONDS)
                    .connectTimeout(120, TimeUnit.SECONDS)
                    .build();
            isURLChanged = false;
            sRetrofit = new Retrofit.Builder()
                    .baseUrl(baseUrl)
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(okHttpClient)
                    .build();
        }
        return sRetrofit;
    }
    public static void changeIP(String url) {
        baseUrl = url;
        isURLChanged = true;
    }
}

APIInterface：

public interface ApiInterface {
    @POST("signin")
    Call<LoginRegisterResponse> login(@Body Profile profile);
}

RetrofitRequest：

public void registerPerson(final Context context) {
        Call<LoginRegisterResponse> call = apiService.register(Person.getInstance());
        call.enqueue(new Callback<LoginRegisterResponse>() {
            @Override
            public void onResponse(Call<LoginRegisterResponse> call, Response<LoginRegisterResponse> response) {
                if (response.isSuccessful()) {
                   ...
                } else {
                   ...
                }
            }
            @Override
            public void onFailure(Call<LoginRegisterResponse> call, Throwable t) {
                ...
            }
        });
    }

问题出在哪里？