Error while running nodejs app on AWS Ubuntu using pm2 - node.js

Question

While starting nodejs with express application on AWS ubuntu using pm2, logs shows below error.
Below is my app.js file
// Packages
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(require('stylus').middleware(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));
//app.locals.basedir = path.join(__dirname, 'views');
global.__base = __dirname + '/';
var dbhelper = require('./routes/dbhelper.js');
var common = require('./routes/common.js');
var ErrorHandler = require('./routes/errorhandler.js');
var authenticationRepository = require(__base + 'repository/authentication.js');
// set up mustbe config
var mustBe = require("mustbe");
var mustBeConfig = require("./mustBeConfig");
mustBe.configure(mustBeConfig);
// Routes
var routes = require('./routes/index');
// Make database connection available to router
app.use(function (req, res, next) {
common.ActionOutput.Message = '';
common.ActionOutput.Results = [];
req.ActionOutput = common.ActionOutput;
req.ActionStatus = common.ActionStatus;
req.ApplicationCookies = common.ApplicationCookies;
req.Security = common.Security;
req.Constants = common.Constants;
console.log(req.url);
// Temp Keys
var key = common.Encrption('firstword|secondword');
var dkey = common.Decryption('3TYkoj9CgZZU+IdD+PAqC3U9xlyJuG40g2fXAJn3GB8=');
var key = req.get('Key');
var msg = null;
if (key == undefined || key == null || key == '')
msg = 'header key not found.';
else {
try {
var keys = common.Decryption(key).split('|');
if (keys.length < 2 || keys.length > 3)
msg = 'header key is incorrect.';
else
next();
} catch (err) {
msg = 'Unable to decrypt header value.';
}
}
if (msg != null) {
common.ActionOutput.Message = msg;
common.ActionOutput.Status = common.ActionStatus.Error;
return res.send(JSON.stringify(common.ActionOutput));
}
});
app.use('/', routes);
app.use(function (err, req, res, next) {
if (!err)
return next();
ErrorHandler.SaveErrorLog(req, res, null, err.message, err.stack, req.connection.remoteAddress, err.path);
});
// catch 404 and forward to error handler
app.use(function (req, res, next) {
console.log('Exception: Not Found ' + req.url);
var APIKey = req.get('Key');
var UserKey = req.get('UserKey');
var DeviceToken = req.get('DeviceToken');
ErrorHandler.SaveErrorLog(req, res, UserKey, 'Resource not found!!!', '', req.connection.remoteAddress, req.url);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function (err, req, res, next) {
res.status(err.status || 500);
res.render('shared/error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
var APIKey = req.get('Key');
var UserKey = req.get('UserKey');
var DeviceToken = req.get('DeviceToken');
ErrorHandler.SaveErrorLog(req, res, UserKey, 'Resource not found!!!', '', req.connection.remoteAddress, req.url);
});
process.on('uncaughtException', function (err, abc) {
console.log('uncaughtException: ' + err);
ErrorHandler.SaveErrorLog(null, null, null, 'UnCaught exception: ' + err.message, err.stack, 'IP', err.address);
});
module.exports = app;
app.listen(3000, function () {
console.log('Server starts on port: ' + 3000);
});
netstat says below which seems to be a problem to access it from outside. Application is running after changing port but not accessible.
Please suggest.