node.js - npm 今天启动失败，出现以下错误

Question

当我今天在 react 上测试我的代码时，我无法启动开发服务器，错误显示为 blow。

material@2.0.0 start /Users/linyujie/Files/Softprofiles/SourceCode/successmanagerreact npm run serve:dev

> material@2.0.0 serve:dev /Users/linyujie/Files/Softprofiles/SourceCode/successmanagerreact
> webpack-dev-server --host 0.0.0.0 --port 3000 --open --env dev

events.js:183
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE 0.0.0.0:3000
    at Object._errnoException (util.js:1024:11)
    at _exceptionWithHostPort (util.js:1046:20)
    at Server.setupListenHandle [as _listen2] (net.js:1351:14)
    at listenInCluster (net.js:1392:12)
    at doListen (net.js:1501:7)
    at _combinedTickCallback (internal/process/next_tick.js:141:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)
    at Function.Module.runMain (module.js:678:11)
    at startup (bootstrap_node.js:187:16)
    at bootstrap_node.js:608:3
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! material@2.0.0 serve:dev: `webpack-dev-server --host 0.0.0.0 --port 3000 --open --env dev`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the material@2.0.0 serve:dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/linyujie/.npm/_logs/2018-06-25T04_55_36_232Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! material@2.0.0 start: `npm run serve:dev`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the material@2.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/linyujie/.npm/_logs/2018-06-25T04_55_36_255Z-debug.log

Answer 1

端口 3000 正在使用中。尝试使用 netstat 查找正在使用该端口的进程的 PID。如果不需要，请停止/终止该进程。此链接可能对 windows 很方便这是 mac找到监听端口的进程。