Socket.io disconnecting - angularjs

Question

I have a chat done in nodejs, Express, socket.io and angular. It works well but disconnects sometimes and at random times. Generally the connection lasts no more than 2 minutes. I get several net :: ERR_CONNECTION_TIMED_OUT on the console.
PS.: I'm using apache 2.2 on CentOS with certified ssl.
Any tips?
My server.js header is below
#!/bin/env node
var express = require('express'),
path = require('path'),
app = express(),
logger = require('morgan'),
_m = require("./models/Message"),
Message = _m.m,
NewMessage = _m.n,
Group = _m.g,
Online = _m.o,
DeletedMessage = _m.d,
LastMessage = _m.l,
_mTASK = require("./models/Task"),
_Task = _mTASK.t,
TaskComment = _mTASK.c,
TaskLog = _mTASK.l,
TaskModel = _mTASK.m,
TaskNotification = _mTASK.n,
_d = require("./lib/Connection");
app.use(logger('dev'));
app.set('port', 3000);
app.set('ipaddr', "127.0.0.1");
var server = require('http').createServer(app);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
server.listen(app.get('port'), app.get('ipaddr'), function() {
console.log('Express server listening on IP: ' + app.get('ipaddr') + ' and port ' + app.get('port'));
});
var io = require("socket.io")(server);
io.set("origins", 'https://meusite.me:*');
io.set('transports', ['polling', 'websocket']);

Answer 1

A bit of socket.io background
Server sends a heartbeat to the client every X seconds where X == the
heartbeat interval configuration value.
If the client fails to respond, socket considers the connect dead
Client waits for a heartbeat from the server every N seconds where N == the heartbeat timeout configuration value.
Both of these values are set on the server with heartbeat timeout being sent to the client when an individual connection is opened.
Given the file above, you could set the heartbeat timeout with something like ...
//WARNING io.set() has been depricated
var io = require("socket.io")(server);
io.set('heartbeat interval', '30000');
io.set('heartbeat timeout', '45000');
io.set("origins", 'https://meusite.me:*');
io.set('transports', ['polling', 'websocket']);
//Setting your server configuration is now done via ..
var socket = require('socket.io')({
// options go here
'configOption': 'configValue';
});