MongoDB Atlas 连接错误“无法连接到服务器...”

Question

我正在尝试使用 mongoose 执行与 mongodb 的连接，但它引发了错误。这是我的代码：

mongoose.connect("mongodb+srv://username:password@cluster0-bocic.mongodb.net/test?retryWrites=true", {useNewUrlParser: true})
    .then(()=>console.log("Database connected..."))
    .catch(err=>console.log(err));

这是错误：

[0] { MongoNetworkError: failed to connect to server [cluster0-shard-00-01-bocic
.mongodb.net:27017] on first connect [MongoNetworkError: connection 5 to cluster
0-shard-00-01-bocic.mongodb.net:27017 closed]
[0]     at Pool.<anonymous> (C:\Users\Med\Desktop\jutsuapp\myapp\node_modules\mo
ngodb-core\lib\topologies\server.js:431:11)
[0]     at Pool.emit (events.js:182:13)
[0]     at connect (C:\Users\Med\Desktop\jutsuapp\myapp\node_modules\mongodb-cor
e\lib\connection\pool.js:557:14)
[0]     at callback (C:\Users\Med\Desktop\jutsuapp\myapp\node_modules\mongodb-co
re\lib\connection\connect.js:109:5)
[0]     at runCommand (C:\Users\Med\Desktop\jutsuapp\myapp\node_modules\mongodb-
core\lib\connection\connect.js:129:7)
[0]     at Connection.errorHandler (C:\Users\Med\Desktop\jutsuapp\myapp\node_mod
ules\mongodb-core\lib\connection\connect.js:321:5)
[0]     at Object.onceWrapper (events.js:273:13)
[0]     at Connection.emit (events.js:182:13)
[0]     at TLSSocket.<anonymous> (C:\Users\Med\Desktop\jutsuapp\myapp\node_modul
es\mongodb-core\lib\connection\connection.js:350:12)
[0]     at Object.onceWrapper (events.js:273:13)
[0]     at TLSSocket.emit (events.js:182:13)
[0]     at _handle.close (net.js:610:12)
[0]     at TCP.done (_tls_wrap.js:386:7)
[0]   name: 'MongoNetworkError',
[0]   errorLabels: [ 'TransientTransactionError' ],
[0]   [Symbol(mongoErrorContextSymbol)]: {} }

Answer 1

我必须解决同样的问题：在过去的三天里，我的应用程序（node.js、express、mongoose、graphql）毫无问题地连接到了 mongoDB（在云中），但今天我得到了：

错误：MongoNetworkError：第一次连接时无法连接到服务器 [cluster0-shard-00-00-cpkkj.mongodb.net:27017] [MongoNetworkError: connection 5 to cluster0-shard-00-00-cpkkj.mongodb.net:27017]关闭]

我验证了我的 PC 的 IP，就是这样：它已经改变了，不再是我添加到白名单中的 IP，所以我添加了新的 IP，问题就解决了。