nodejs EADDRINUSE错误
我开始使用[cloud9] [1]并尝试托pipe我的nodejs应用程序。 当我尝试运行我的应用程序时，抛出以下错误：
重要：使用process.env.PORT作为port，process.env.IP作为你的主机
Important: use process.env.PORT as the port and process.env.IP as the host in your scripts! debugger listening on port 15454 8080 0.0.0.0 events.js:72 throw er; // Unhandled 'error' event ^ Error: listen EADDRINUSE at errnoException (net.js:905:11) at Server._listen2 (net.js:1043:14) at listen (net.js:1065:10) at Server.listen (net.js:1147:9) at exports.lookup.callback (dns.js:72:18) at process._tickCallback (node.js:442:13) at Module.runMain [as _onTimeout] (module.js:499:11) at Timer.listOnTimeout [as ontimeout] (timers.js:112:15) 我的app.js：
var app = require('express')(); //var app = express(); //var http = require('http'); var server = require('http').Server(app); var io = require('socket.io')(server); app.set('port', process.env.PORT || 3000); var port = app.get('port'); console.log(port); server.listen(port, process.env.IP); // routing app.get('/', function (req, res) { res.sendfile(__dirname + '/index.html'); }); // usernames which are currently connected to the chat var usernames = {}; // rooms which are currently available in chat var rooms = []; io.sockets.on('connection', function (socket) { socket.on('adduser', function (username, room) { socket.username = username; socket.room = room; usernames[username] = username; socket.join(room); socket.emit('updatechat', 'SERVER', 'You are connected. Start chatting'); socket.broadcast.to(room).emit('updatechat', 'SERVER', username + ' has connected to this room'); }); socket.on('createroom', function () { var new_room = (""+Math.random()).substring(2,7); rooms.push(new_room); socket.emit('updatechat', 'SERVER', 'Your room is ready, invite someone using this ID:' + new_room); socket.emit('roomcreated', new_room); }); // when the client emits 'sendchat', this listens and executes socket.on('sendchat', function (data) { // we tell the client to execute 'updatechat' with 2 parameters io.sockets. in (socket.room).emit('updatechat', socket.username, data); }); // when the user disconnects.. perform this socket.on('disconnect', function () { // remove the username from global usernames list delete usernames[socket.username]; // update list of users in chat, client-side io.sockets.emit('updateusers', usernames); // echo globally that this client has left if(socket.username !== undefined){ socket.broadcast.emit('updatechat', 'SERVER', socket.username + ' has disconnected'); socket.leave(socket.room); } }); });
我试图寻找任何已经在8080运行的进程，这是输出
user@chat_room:~/workspace (master) $ ps ax | grep node 14154 pts/1 S+ 0:00 grep --color=auto node
如果我尝试使用其他端口，那么我没有得到套接字文件，它会引发404错误：
<script src="/socket.io/socket.io.js"></script>
这在当地正常工作。
编辑打开端口：
user@chat_room:~/workspace (master) $ netstat --listen Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 *:mysql *:* LISTEN tcp 0 0 localhost:17123 *:* LISTEN tcp6 0 0 [::]:http-alt [::]:* LISTEN tcp6 0 0 [::]:ssh [::]:* LISTEN Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 353035357 /tmp/tmux-1000/cloud91.8 unix 2 [ ACC ] STREAM LISTENING 351539622 /home/ubuntu/lib/mysql/socket/mysql.sock unix 2 [ ACC ] STREAM LISTENING 352204732 /home/ubuntu/.c9/1312164/collab.sock user@chat_room:~/workspace (master) $ netstat -vatn Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:17123 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:37186 127.0.0.1:15455 TIME_WAIT tcp 0 0 127.0.0.1:15454 127.0.0.1:59371 TIME_WAIT tcp6 0 0 :::8080 :::* LISTEN tcp6 0 0 :::22 :::* LISTEN tcp6 0 400 172.17.0.248:22 10.240.179.70:43154 ESTABLISHED user@chat_room:~/workspace (master) $ netstat -vat Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 *:mysql *:* LISTEN tcp 0 0 localhost:17123 *:* LISTEN tcp 0 0 localhost:37186 localhost:15455 TIME_WAIT tcp 0 0 localhost:15454 localhost:59371 TIME_WAIT tcp6 0 0 [::]:http-alt [::]:* LISTEN tcp6 0 0 [::]:ssh [::]:* LISTEN tcp6 0 0 user-chat_:ssh 10.240.179.70:43154 ESTABLISHED user@chat_room:~/workspace (master) $ lsof -i COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME mysqld 2316 ubuntu 10u IPv4 351539621 0t0 TCP *:mysql (LISTEN) apache2 2374 ubuntu 4u IPv6 351539675 0t0 TCP *:http-alt (LISTEN) apache2 2381 ubuntu 4u IPv6 351539675 0t0 TCP *:http-alt (LISTEN) apache2 2382 ubuntu 4u IPv6 351539675 0t0 TCP *:http-alt (LISTEN) apache2 2383 ubuntu 4u IPv6 351539675 0t0 TCP *:http-alt (LISTEN) apache2 2384 ubuntu 4u IPv6 351539675 0t0 TCP *:http-alt (LISTEN) apache2 2385 ubuntu 4u IPv6 351539675 0t0 TCP *:http-alt (LISTEN) vfs-worke 13915 ubuntu 13u IPv4 352221394 0t0 TCP localhost:17123 (LISTEN)
我会说错误说了一切：
重要：使用process.env.PORT作为port，process.env.IP作为脚本中的主机。
您的环境要求您分别使用process.env.PORT和process.env.IP作为port和ip（是cloud9？），但是在这一行中，您正在使用另一个环境variables：
app.set('port', process.env.app_port || 8080)
固定：
app.set('port', process.env.PORT || 8080)
（一般来说，EADDRINUSE错误是当另一个进程正在监听那个端口的时候）
对于404错误
编辑 ：之前发布的代码是旧版本的Express。 请参阅http://socket.io/docs/#using-with-express-3/4
在代码中是否有可能要求在源代码中的两个位置listen()同一个端口？ 我没有看到两个监听电话，但我不熟悉express或socket知道另一个函数是否执行了这个操作……在不同的情况下，它曾经发生过。
使用以下命令列出在端口8080上运行的进程：lsof -i：8080，使用正在运行的进程的PID通过使用命令kill使用端口8080的实例：kill -9 PID