Question

我正在尝试为mongo数据库创建一个简单的rest api

我有一个server.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-Parser');

const app = express();

app.use(bodyParser.json());

const db = require('./config/keys').mongoURI;

mongoose
    .connect('mongodb://test:test123@ds241012.mlab.com:41012/test_db' ,{useNewUrlParser: true})
    .then(() => console.log('DB Connected'))
    .catch(err => console.log(err));

const port = process.env.PORT || 4000;

app.listen(port, () => console.log('Server started'));

我使用nodemon，当我执行npm run server时，我在终端（console.log）中看到“服务器已启动”

此后，我得到以下输出端子

{ MongoNetworkError: failed to connect to server [ds241012.mlab.com:41012] on first connect [MongoNetworkError: connection 0 to ds241012.mlab.com:41012 timed out]
    at Pool.<anonymous> (/Users/cdd/Documents/_Work/cd/React/test_db/node_modules/mongodb-core/lib/topologies/server.js:564:11)
    at emitOne (events.js:116:13)
    at Pool.emit (events.js:211:7)
    at Connection.<anonymous> (/Users/cdd/Documents/_Work/cd/React/test_db/node_modules/mongodb-core/lib/connection/pool.js:317:12)
    at Object.onceWrapper (events.js:317:30)
    at emitTwo (events.js:126:13)
    at Connection.emit (events.js:214:7)
    at Socket.<anonymous> (/Users/cdd/Documents/_Work/cd/React/test_db/node_modules/mongodb-core/lib/connection/connection.js:257:10)
    at Object.onceWrapper (events.js:313:30)
    at emitNone (events.js:106:13)
    at Socket.emit (events.js:208:7)
    at Socket._onTimeout (net.js:420:8)
    at ontimeout (timers.js:482:11)
    at tryOnTimeout (timers.js:317:5)
    at Timer.listOnTimeout (timers.js:277:5)
  name: 'MongoNetworkError',
  errorLabels: [ 'TransientTransactionError' ],
  [Symbol(mongoErrorContextSymbol)]: {} }

如果我随后更新server.js，终端将返回到“服务器已启动”

此输出是否正常

Answer 1

如果您已经将尝试连接mongodb的计算机的IP地址列入了白名单，那么出现错误的唯一可能性就是防火墙阻止了它。

REST API-MongoNetworkError：无法连接到服务器

1 个答案: