如何解决运行节点服务器错误

Question

我在运行节点服务器时一直面临以下错误，但代码以前可以正常工作。有专家可以解决这个问题吗？

下面是server.js的错误部分

    try {
        app.listen(port, function(){
            console.log('Server started on port'+port);
        })
    } catch (e) {
        console.log('There was an error', e);
    }

-------------------------------error---------------------------------------
PS C:\Users\User\WebstormProjects\myapp> nodemon server
[nodemon] 1.11.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node server app.js`
events.js:182
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE :::3000
    at Object.exports._errnoException (util.js:1024:11)
    at exports._exceptionWithHostPort (util.js:1047:20)
    at Server.setupListenHandle [as _listen2] (net.js:1319:14)
    at listenInCluster (net.js:1367:12)
    at Server.listen (net.js:1467:7)
    at Function.listen (C:\Users\User\WebstormProjects\myapp\node_modules\express\lib\application.js:618:24)
    at Object.<anonymous> (C:\Users\User\WebstormProjects\myapp\server.js:52:9)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
[nodemon] app crashed - waiting for file changes before starting...

Answer 1

您的应用程序正在运行，也许您刚刚启动了两次，您可以尝试技能节点

Answer 2

另一个应用程序已经在使用端口3000。您可以用另一个端口启动它。