OkHttp3 logging interceptor does not log cookies

I'm using OkHttp 3 (with retrofit2) and I'm trying to get both cookies and logging to work. The problem is the log shows everything but not the cookies. I have captured the HTTP traffic and the cookie ARE being sent, they are just not logged. I tried debugging the logging interceptor, and indeed, the request appears to have no cookies (although it does have other custom headers) when it reaches the intercept() call. Any ideas what am I doing wrong?

    final Gson gson = new GsonBuilder()
            .setDateFormat(JSON_DATE_FORMAT)
            .create();

    HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
    logging.setLevel(HttpLoggingInterceptor.Level.BODY);
    CookieManager cookieManager = new CookieManager();
    cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);

    OkHttpClient.Builder okClientBuilder = new OkHttpClient.Builder()
        .addInterceptor(new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request request = chain
                        .request()
                        .newBuilder()
                        .addHeader("custom-header", Utils.getRandomUUIDForHeader())
                        .build();
                return chain.proceed(request);
            }
        })
        .cookieJar(new JavaNetCookieJar(cookieManager))
        .addInterceptor(logging);

    if (mock) {
        okClientBuilder.addInterceptor(new MockApiInterceptor(context));
    }

    return new Retrofit
            .Builder()
            .baseUrl(serverURL)
            .client(okClientBuilder.build())
            .addConverterFactory(ScalarsConverterFactory.create())
            .addConverterFactory(GsonConverterFactory.create(gson))
            .build()
            .create(DefaultApi.class);

Sample output:

<-- 200 OK http://localhost:53580/login (31ms)
Content-Length: 66
Set-Cookie: JSESSIONID=4b42fc452e6adc55334e65b945c24b8886b127a57786a6cd51de6b3117a58cc9; Path=/
OkHttp-Sent-Millis: 1467298601713
OkHttp-Received-Millis: 1467298601718

{
  "status":"OK",
  "sessionId":"p8tvdIHxQaON",
  "entities":[]
}
<-- END HTTP (66-byte body)
--> GET http://localhost:53580/data http/1.1
custom-header: 663d0354-8a16-471a-bf6d-fb7fdb3d3404
--> END GET

Solution

The logging interceptor runs before cookies have been added to the request. Work around this by using a network interceptor instead of an application interceptor. More guidance is here:

https://square.github.io/okhttp/features/interceptors/