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챕터 12.4 Mongod 연결 실패 #797

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@lear1091

Node.js 교과서와 제로코님의 코드를 통해서 gif 채팅방을 시키려고 교과서 8장에서 Mongod 설치하고 Windows Powershell 창을 띄워서 제로코님의 코드에서 12.4로 루트경로도 맞춰서 콘솔창에 npm start를 치니깐 에러코드가 반복적으로 계속 뜹니다 왜 그런걸까요..? 혹시나 제가 알려드리지 못한게 있다면 알려주시면 감사하겠습니다.
[에러코드]
몽고디비 연결이 끊겼습니다. 연결을 재시도합니다.
몽고디비 연결 에러 MongoServerError: Authentication failed.
at Connection.onMessage (C:\Users\clear\OneDrive\바탕 화면\Test Python\nodejs-book-master\ch12\12.4\gif-chat\node_modules\mongodb\lib\cmap\connection.js:227:30)
at MessageStream. (C:\Users\clear\OneDrive\바탕 화면\Test Python\nodejs-book-master\ch12\12.4\gif-chat\node_modules\mongodb\lib\cmap\connection.js:60:60)
at MessageStream.emit (node:events:519:28)
at processIncomingData (C:\Users\clear\OneDrive\바탕 화면\Test Python\nodejs-book-master\ch12\12.4\gif-chat\node_modules\mongodb\lib\cmap\message_stream.js:125:16)
at MessageStream._write (C:\Users\clear\OneDrive\바탕 화면\Test Python\nodejs-book-master\ch12\12.4\gif-chat\node_modules\mongodb\lib\cmap\message_stream.js:33:9)
at writeOrBuffer (node:internal/streams/writable:564:12)
at _write (node:internal/streams/writable:493:10)
at Writable.write (node:internal/streams/writable:502:10)
at Socket.ondata (node:internal/streams/readable:1007:22)
at Socket.emit (node:events:519:28) {
ok: 0,
code: 18,
codeName: 'AuthenticationFailed',
connectionGeneration: 0,
[Symbol(errorLabels)]: Set(2) { 'HandshakeError', 'ResetPool' }
}

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