Node js 项目启动报错，错误码，events.js:141，throw er; //Unhandled 'error' event，解决办法
当我遇到这个问题的时候，我纠结了好半天，找了好多资料，都说是端口占用，必须杀死端口重新启动，确实是这样。但是我当时在Windows下直接启动没有任何问题，直接就能把服务器启动起来，但是发现在mac下老是报这个错：
game server is listening on localhost:9003
client service is listening on port 9001
room service is listening on localhost:9002
events.js:141
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE :::9001
at Object.exports._errnoException (util.js:907:11)
at exports._exceptionWithHostPort (util.js:930:20)
at Server._listen2 (net.js:1250:14)
at listen (net.js:1286:10)
at Server.listen (net.js:1382:5)
at EventEmitter.listen (/Users/chaoge/Downloads/cocosjs/server/server/node_modules/express/lib/application.js:617:24)
at Object.exports.start(/Users/chaoge/Downloads/cocosjs/server/server/hall_server/client_service.js:315:6)
at Object.<anonymous>(/Users/chaoge/Downloads/cocosjs/server/server/hall_server/app.js:10:16)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
account server is listening on 9000
dealer api is listening on localhost:12581
events.js:141
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE :::9000
at Object.exports._errnoException (util.js:907:11)
at exports._exceptionWithHostPort (util.js:930:20)
at Server._listen2 (net.js:1250:14)
at listen (net.js:1286:10)
at Server.listen (net.js:1382:5)
at EventEmitter.listen(/Users/chaoge/Downloads/cocosjs/server/server/node_modules/express/lib/application.js:617:24)
at Object.exports.start(/Users/chaoge/Downloads/cocosjs/server/server/account_server/account_server.js:19:6)
at Object.<anonymous>(/Users/chaoge/Downloads/cocosjs/server/server/account_server/app.js:11:4)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
game server is listening on 10000
events.js:141
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE :::10000
at Object.exports._errnoException (util.js:907:11)
at exports._exceptionWithHostPort (util.js:930:20)
at Server._listen2 (net.js:1250:14)
at listen (net.js:1286:10)
at Server.listen (net.js:1382:5)
at Server.listen.Server.attach(/Users/chaoge/Downloads/cocosjs/server/server/node_modules/socket.io/lib/index.js:216:9)
at new Server(/Users/chaoge/Downloads/cocosjs/server/server/node_modules/socket.io/lib/index.js:50:17)
atServer(/Users/chaoge/Downloads/cocosjs/server/server/node_modules/socket.io/lib/index.js:38:41)
at Object.exports.start(/Users/chaoge/Downloads/cocosjs/server/server/majiang_server/socket_service.js:9:27)
at Object.<anonymous> (/Users/chaoge/Downloads/cocosjs/server/server/majiang_server/app.js:15:16)
看到这些错误信息，我相信很多人都可能遇到过，也到处找解决办法，其实我们只要查看端口号，看看哪些端口被占用。
打开终端，然后输入：ps –ef|grep node,然后显示如图所示：
我们会发现这几个文件占用了这几个端口，那么我们应该怎么办呢?当然是把这几个端口杀死，在终端输入：kill -9 1284,回车，然后再输入：kill -9 1288 ，继续输入kill -9 1858，回车，到此我们就把这几个端口占用都杀死了，如图所示：
执行到这步，你再重新启动，应该就不会报错了，赶紧尝试吧！
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