Why does the Socket Server stops working? - node.js

Question

I am creating a WebSocket for an online game. I have some code that works perfectly, but after a time the server stops the Socket. I don't know what can be wrong and I don't have an error or something. It just stops running.
Does anyone know what can be wrong with this code?
var mysql = require('mysql');
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var cookies;
var db = mysql.createConnection({
host: 'hostname',
user: 'username',
password: 'password',
database: 'database',
port: 3306
});
db.connect(function(err){
if (err) console.log(err)
});
function createCookie(name,value,days, socket) {
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else var expires = "";
socket.handshake.headers['cookie'] = name+"="+value+expires+"; path=/";
}
function readCookie(name, socket) {
var nameEQ = name + "=";
var ca = socket.handshake.headers['cookie'].split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
function eraseCookie(name, socket) {
createCookie(name,"",-1, socket);
}
io.on('connection', function(socket){
console.log('a user connected');
socket.on('disconnect', function(){
console.log('user disconnected');
});
socket.on('chat message', function(msg){
if(readCookie('uid', socket) != null) {
db.query('SELECT * FROM ww_user_settings WHERE usr_set_id = '+readCookie('uid', socket)+' AND usr_set_setting_id = 23').on('result', function(data){console.log('Message from '+data.usr_set_value+': '+msg);io.emit('chat message', data.usr_set_value+": "+msg);});
}
else {
console.log('Unauthorized message sent.');
socket.disconnect('unauthorized');
}
});
});
http.listen(44444, function(){
console.log('listening on *:44444');
});
As I said, the Socket works. But after a time, even when nothing special happens, the Socket stops running on my Windows 2012 Server.

Answer 1

The problem here was that the server lost the connection with the MySQL Server. By losing it, it will stop working.