How to retry HTTP requests with OkHttp/Retrofit?

For Retrofit 2.x;

You can use Call.clone() method to clone request and execute it.

For Retrofit 1.x;

You can use Interceptors. Create a custom interceptor

    OkHttpClient client = new OkHttpClient();
    client.setConnectTimeout(CONNECT_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
    client.setReadTimeout(READ_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
    client.interceptors().add(new Interceptor() {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();

            // try the request
            Response response = chain.proceed(request);

            int tryCount = 0;
            while (!response.isSuccessful() && tryCount < 3) {

                Log.d("intercept", "Request is not successful - " + tryCount);

                tryCount++;

                // retry the request
                response.close()
                response = chain.proceed(request);
            }

            // otherwise just pass the original response on
            return response;
        }
    });

And use it while creating RestAdapter.

new RestAdapter.Builder()
        .setEndpoint(API_URL)
        .setRequestInterceptor(requestInterceptor)
        .setClient(new OkClient(client))
        .build()
        .create(Adapter.class);