NodeJS connect() failed (111: Connection refused) while connecting to upstream

I am running into an issue today where all of a sudden my Elastic Beanstalk app is sending me to a 502 Bad Gateway page. Now I have run into this issue in the past and the reason why this was happening was because the Node command could not start my server. I fixed this by inputting Node command: node main.js and I never ran into this issue until randomly this morning. All of a sudden it stopped working and I get this error, in my error log:

2015/03/31 13:07:17 [error] 697#0: *519 connect() failed (111: Connection refused) while connecting to upstream, client: 54.146.12.189, server: , request: "HEAD / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "54.152.12.19"
2015/03/31 13:07:17 [error] 697#0: *521 connect() failed (111: Connection refused) while connecting to upstream, client: 54.146.18.189, server: , request: "GET /clientaccesspolicy.xml HTTP/1.1", upstream: "http://ift.tt/19EVUGa", host: "54.152.12.19"
2015/03/31 13:16:02 [error] 697#0: *523 connect() failed (111: Connection refused) while connecting to upstream, client: 69.204.65.1321, server: , request: "GET /blog/the-differences-in-segmenting-your-data-by-users-and-sessions HTTP/1.1", upstream: "http://ift.tt/1OUSZKm", host: "www.mywebsite.com"

How should I approach solving this issue?

Here is my main.js file:

//Load express
var express = require('express');
var app = express();
var router = express.Router(); // get an instance of the router
var bodyParser = require('body-parser'); // configure app to use bodyParser()
var mongoose = require('mongoose');
var passport = require('passport');
var flash = require('connect-flash');
var morgan = require('morgan');
var cookieParser = require('cookie-parser');
var session = require('express-session');
var aws = require('aws-sdk');

app.use(bodyParser.urlencoded({ extended: true})); // get data from a POST method
app.use(bodyParser.json());
app.use(morgan('dev'));
app.use(cookieParser());


var port = process.env.PORT || 8080; // set the port

var DB_CONFIG = process.env.DB_CONFIGURATION;
var AWS_ACCESS_KEY = process.env.AWS_ACCESS_KEY;
var AWS_SECRET_KEY = process.env.AWS_SECRET_KEY;
var S3_BUCKET = process.env.S3_BUCKET;

var blogDB = require('./config/blogDB.js');
mongoose.connect(blogDB.url);




require('./config/passport.js')(passport);


app.set('view engine', 'ejs'); // set ejs as the view engine

app.use(express.static(__dirname + '/public')); // set the public directory

app.use(session({ secret: 'thisisatest' }));
app.use(passport.initialize());
app.use(passport.session());

app.use(flash());


var routes = require('./app/routes');

app.use(routes); // use routes.js


app.listen(port);
console.log('magic is happening on port' + port);