인프런 커뮤니티 질문&답변

const express = require('express')
const app = express()
const port = 5000

const mongoose = require('mongoose')
mongoose.connect('mongodb+srv://newlifecode:1234@newlifecode.f0tau.mongodb.net/test?retryWrites=true&w=majority&appName=newlifecode'
, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then(() => console.log('MongoDB Connected...'))
  .catch(err => console.error('MongoDB Connection Error:', err.message));


app.get('/', (req, res) => {
  res.send('Hello World!')
})

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`)
})

PS C:\Users\USER\Documents\boiler-plate> npm run start

> boiler-plate@1.0.0 start
> node index.js

(node:7628) [MONGODB DRIVER] Warning: useNewUrlParser is a deprecated option: useNewUrlParser has no effect since Node.js Driver version 4.0.0 and will be removed in the next major version
(Use `node --trace-warnings ...` to show where the warning was created)
(node:7628) [MONGODB DRIVER] Warning: useUnifiedTopology is a deprecated option: useUnifiedTopology has no effect since Node.js Driver version 4.0.0 and will be removed in the next major version
node:events:496
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::5000
    at Server.setupListenHandle [as _listen2] (node:net:1907:16)
    at listenInCluster (node:net:1964:12)
    at Server.listen (node:net:2066:7)
    at Function.listen (C:\Users\USER\Documents\boiler-plate\node_modules\express\lib\application.js:635:24)
    at Object.<anonymous> (C:\Users\USER\Documents\boiler-plate\index.js:19:5)
    at Module._compile (node:internal/modules/cjs/loader:1546:14)
    at Object..js (node:internal/modules/cjs/loader:1689:10)
    at Module.load (node:internal/modules/cjs/loader:1318:32)
    at Function._load (node:internal/modules/cjs/loader:1128:12)
    at TracingChannel.traceSync (node:diagnostics_channel:315:14)
Emitted 'error' event on Server instance at:
    at emitErrorNT (node:net:1943:8)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21) {      
  code: 'EADDRINUSE',
  errno: -4091,
  syscall: 'listen',
  address: '::',
  port: 5000
}

Node.js v22.11.0
PS C:\Users\USER\Documents\boiler-plate> npm run start

> boiler-plate@1.0.0 start
> node index.js

(node:860) [MONGODB DRIVER] Warning: useNewUrlParser is a deprecated option: useNewUrlParser has no effect since Node.js Driver version 4.0.0 and will be removed in the next major version
(Use `node --trace-warnings ...` to show where the warning was created)
(node:860) [MONGODB DRIVER] Warning: useUnifiedTopology is a deprecated option: useUnifiedTopology has no effect since Node.js Driver version 4.0.0 and will be removed in the next major version
node:events:496
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::5000
    at Server.setupListenHandle [as _listen2] (node:net:1907:16)
    at listenInCluster (node:net:1964:12)
    at Server.listen (node:net:2066:7)
    at Function.listen (C:\Users\USER\Documents\boiler-plate\node_modules\express\lib\application.js:635:24)
    at Object.<anonymous> (C:\Users\USER\Documents\boiler-plate\index.js:19:5)
    at Module._compile (node:internal/modules/cjs/loader:1546:14)
    at Object..js (node:internal/modules/cjs/loader:1689:10)
    at Module.load (node:internal/modules/cjs/loader:1318:32)
    at Function._load (node:internal/modules/cjs/loader:1128:12)
    at TracingChannel.traceSync (node:diagnostics_channel:315:14)
Emitted 'error' event on Server instance at:
    at emitErrorNT (node:net:1943:8)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21) {
  code: 'EADDRINUSE',
  errno: -4091,
  syscall: 'listen',
  address: '::',
  port: 5000
}