Sample to create HDInsight mapper - currently results in AggregateException (HttpRequestException)

gistfile1.cs

using Microsoft.Hadoop.MapReduce;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RestaurantUserMapper
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                var cluster = new Uri("https://{cluster-name}.azurehdinsight.net:563");
                var hadoop = Hadoop.Connect(clusterName: cluster,
                    userName: "admin",
                    password: "{password}");

                Console.WriteLine("Starting: {0}", DateTime.Now);
                var result = hadoop.MapReduceJob.ExecuteJob<UserRestaurantExtractionJob>();
                var info = result.Info;

                Console.WriteLine("Done: {0}", DateTime.Now);

                Console.WriteLine("\nInfo From Server\n----------------------");
                Console.WriteLine("StandardError: " + info.StandardError);
                Console.WriteLine("\n----------------------");
                Console.WriteLine("StandardOut: " + info.StandardOut);
                Console.WriteLine("\n----------------------");
                Console.WriteLine("ExitCode: " + info.ExitCode);

            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: {0}", ex.Message);
                Console.WriteLine("StackTrace: {0}", ex.StackTrace);
            }

            Console.WriteLine("Press any key to exit....");
            Console.ReadKey();
        }
    }

    public class UserRestaurantMapper : MapperBase
    {

        public override void Map(string inputLine, MapperContext context)
        {
            var data = inputLine.Split(',');
            int userId, restaurantId;

            if (int.TryParse(data[0], out userId) && int.TryParse(data[1], out restaurantId))
            {
                context.EmitLine(userId + "," + restaurantId);
            }
            else
            {
                Console.WriteLine("Unable to parse input line: '{0}'", inputLine);
            }
        }
    }

    public class UserRestaurantExtractionJob : HadoopJob<UserRestaurantMapper>
    {
        public override HadoopJobConfiguration Configure(ExecutorContext context)
        {
            var config = new HadoopJobConfiguration()
            {
                DeleteOutputFolder = true,
                InputPath = "/recommendations/restaurant",
                OutputFolder = "/recommendations/restaurant/mappingoutput"
            };

            return config;
        }
    }

}