npm run dev因爲端口號被佔用報錯

Error: listen EADDRINUSE: address already in use :::8084
    at Server.setupListenHandle [as _listen2] (net.js:1270:14)
    at listenInCluster (net.js:1318:12)
    at Server.listen (net.js:1405:7)
    at Function.listen (E:\work\hyxh\hyxh-admin\node_modules\express\lib\application.js:618:24)
    at Object.<anonymous> (E:\work\hyxh\hyxh-admin\build\dev-server.js:82:18)
    at Module._compile (internal/modules/cjs/loader.js:701:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
    at Module.load (internal/modules/cjs/loader.js:600:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
    at Function.Module._load (internal/modules/cjs/loader.js:531:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:754:12)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
Emitted 'error' event at:
    at emitErrorNT (net.js:1297:8)
    at process._tickCallback (internal/process/next_tick.js:63:19)
    at Function.Module.runMain (internal/modules/cjs/loader.js:757:11)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! litadmin@1.2.1 dev: `node build/dev-server.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the litadmin@1.2.1 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!     C:\Users\Sapling\AppData\Roaming\npm-cache\_logs\2020-03-12T03_19_45_821Z-debug.log