同時運行客戶端和服務器端問題

Question

我試圖運行客戶端和服務器端應用程序但尚未成功。 基本上我在我的客戶端應用程序（reactjs）上運行構建，然后將所有文件從構建文件夾復制到服務器端工作所在的客戶端/構建文件夾。 一切正常，直到我對客戶端工作進行了一些更改，並重建和更新了服務器文件夾。 我不太確定有關的錯誤消息...這是我的錯誤日志

[0] > node app.js
[0] 
[0] (node:2907) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
[0] events.js:167
[0]       throw er; // Unhandled 'error' event
[0]       ^
[0] 
[0] Error: listen EADDRINUSE :::3000
[0]     at Server.setupListenHandle [as _listen2] (net.js:1286:14)
[0]     at listenInCluster (net.js:1334:12)
[0]     at Server.listen (net.js:1421:7)
[0]     at Object.<anonymous> (/Users/guest/Desktop/work/copy/finfine/app.js:180:8)
[0]     at Module._compile (internal/modules/cjs/loader.js:688:30)
[0]     at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
[0]     at Module.load (internal/modules/cjs/loader.js:598:32)
[0]     at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
[0]     at Function.Module._load (internal/modules/cjs/loader.js:529:3)
[0]     at Function.Module.runMain (internal/modules/cjs/loader.js:741:12)
[0]     at startup (internal/bootstrap/node.js:285:19)
[0]     at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)
[0] Emitted 'error' event at:
[0]     at emitErrorNT (net.js:1313:8)


   [0]     at process._tickCallback (internal/process/next_tick.js:63:19)
    [0]     at Function.Module.runMain (internal/modules/cjs/loader.js:744:11)
    [0]     at startup (internal/bootstrap/node.js:285:19)
    [0]     at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)
    [0] npm ERR! code ELIFECYCLE
    [0] npm ERR! errno 1
    [0] npm ERR! finfine@1.0.0 start-server: `node app.js`
    [0] npm ERR! Exit status 1
    [0] npm ERR! 
    [0] npm ERR! Failed at the finfine
@1.0.0 start-server script.
    [0] npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
    [0] 
    [0] npm ERR! A complete log of this run can be found in:
    [0] npm ERR!     /Users/guest/.npm/_logs/2019-03-26T00_43_54_435Z-debug.log
    [0] npm run start-server exited with code 1
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! finfine@1.0.0 start: `concurrently "npm run start-server"`
    npm ERR! Exit status 1
    npm ERR! 
    npm ERR! Failed at the finfine@1.0.0 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/guest/.npm/_logs/2019-03-26T00_43_54_468Z-debug.log

Answer 1

錯誤的關鍵是這一行： Error: listen EADDRINUSE :::3000這意味着當你運行npm run start-server ，已經有一個服務器正在運行並監聽該端口。 您的react開發服務器是否在與服務器相同的端口（3000）上運行？

如果您有相當新版本的macOS，可以使用此命令檢查端口3000上運行的是什么： lsof -nP -i4TCP:3000 | grep LISTEN lsof -nP -i4TCP:3000 | grep LISTEN