error and server nodejs after 2 minutes

Question

Good evening guys I have a basic program that until yesterday was good, today afternoon started the error in the execution of the "app nodemon" or only the "app Node"

follows the error:

throw er // unhandled 'error' Event error: read ECONNRESET at _errnoExecmption (util.js:992:11 at TCP.onread (net.js:618:25)

Searching everyone say that it is because the port is in use by another process, but I do not believe, because the server goes up and after 2 minutes, OBS.. Two minutes without me messing with the system if I’m using the system, it won’t stop. I even timed it. With the nodemon it stands in a message in red saying he’s waiting for a correction. I already undone the last changes I added to the system, which was a call to a search screen via a post flumulario (was working well the search).

Does anyone know what it can be??

Below I leave my app.js (pretty basic)

var express = require('express');

var app = express();

var port = process.env.PORT || 3000;

var passport = require('passport');
var flash = require('connect-flash');
var path = require('path');

var morgan = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var session = require('express-session');
var expressLayouts = require('express-ejs-layouts')

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

require('./config/passport')(passport); // passo o  passport para configuração

//configurar nossa aplicação express

app.use(morgan('dev')); // registrar cada pedido para o console
app.use(cookieParser()); // ler cookies (necessários para autenticação)
//app.use(bodyParser()); // obter informações de formulários html

//ver configuração do motor
app.use(express.static(path.join(__dirname, 'public')));
app.set('views', path.join(__dirname, 'app/views'));
app.set('view engine', 'ejs');

app.use(expressLayouts);

app.use(session({
    secret: 'SessaoSecreta...',
    resave: true,
    saveUninitialized: true
}));

app.use(passport.initialize());
app.use(passport.session()); // sessões de login persistentes
app.use(flash()); // use o flash de conexão para mensagens flash armazenadas na sessão

require('./config/routes.js')(app, passport); // carregar nossas rotas e passar em nosso aplicativo e passaporte totalmente configurado

app.listen(port);

console.log('  ');
console.log('Conectado em ===>  ' + port);
console.log('  ');
console.log('  ');


//pegar 404 e encaminhar para manipulador de erro
app.use(function (req, res, next) {
    res.status(404).render('404', { title: "Desculpe, página nao encontrada", session: req.sessionbo });
});

app.use(function (req, res, next) {
    res.status(500).render('404', { title: "Desculpe, página nao encontrada" });
});

exports = module.exports = app;

Needing more information here guys, thank you!! at+