Nodejs服务器在几个小时后停止接受连接

我制作了一个控制同时登录的应用程序，在启动时一切正常，但几个小时后我无法再连接到服务器，我的客户端返回以下错误：net:：ERR_CONNECTION_TIMED_OUT并且在服务器端不会发生任何错误，就像它正常运行一样。。。以下代码：

客户端：

var socket;
function connect(id) {
    socket = io.connect('http://IP:4200');
    
    
    socket.on('connect', function (data) {
        socket.emit('join', id);
    });
    
    socket.on('messages', function (data) {
        console.log('MSG: ' + data.toString());
        switch (data.toString()) {
            case "kick":
                socket.close();
                console.log("KICK!");
                break;
            case "duplicate_entry":
                socket.close();
                console.log("Another user connection!");
                break;
        }
    });
}

服务器端：

var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
var clients = [];
app.use(express.static(__dirname + '/bower_components'));
function logtimestamp() {
    var log_date = new Date();
    log_date = '[' + log_date.getFullYear() + '/' + (log_date.getMonth() + 1) + '/' + log_date.getDate() + ' ' + log_date.getHours() + ':' + log_date.getMinutes() + ':' + log_date.getSeconds() + ']';
    return log_date;
}// FUNCTION logtimestamp
console.log("Start time: " + logtimestamp());
console.log("Server port 4200")
console.log("websocket server created!");
try {
    io.on('connection', function (client) {
        try {
            var id;
            var conexao;
            client.on('join', function (data) {
                try {
                    console.log('Client connected...'+logtimestamp()+' ID:' + data);
                    id = data;
                    conexao = {
                        ws: client,
                        id_user: data
                    };
                    clients.push(conexao);
                    for (var x = 0; x < clients.length; x++) {
                        //desconect previous user
                        try {
                            if (clients[x].id_user == id) {
                                if (clients[x].ws != conexao.ws) {
                                    clients[x].ws.emit('messages', 'duplicate_entry');
                                    clients.splice(x, 1);
                                }
                            }
                          
                        } catch (err) {
                            console.log("ERROR 1: " + err.message);
                        }
                    }
                } catch (err) {
                    console.log("ERROR 2: " + err.message);
                }
            });
        } catch (err) {
            console.log("ERROR 3: " + err.message);
        }
    });
} catch (err) {
    console.log("ERROR 4: " + err.message);
}
server.listen(4200);