Node.js Server not connecting to local mongodb instance

Question

I have a node.js server that tries to connect to mongodb (working with mongoose):

mongoose.connect('mongodb://127.0.0.1:27017/ordry', {useNewUrlParser: true, useFindAndModify: false, useCreateIndex: true}).then(result =>{ // 127.0.0.1:27017
    console.log("Successfully connected to db!");
}).catch(error =>{
    console.log("Error connecting to the database!")
})

Although mongodb is up and running, the connection fails.

I get the following logs:

Thu Jul 18 13:24:50.124 [initandlisten] options: { dbpath: "/home/pi/mongodb/" }

Thu Jul 18 13:24:50.166 [initandlisten] waiting for connections on port 27017

Thu Jul 18 13:24:50.166 [websvr] admin web console waiting for connections on port 28017

Thu Jul 18 13:25:45.647 [initandlisten] connection accepted from 127.0.0.1:50188 1 (1 connection now open)

Thu Jul 18 13:25:45.742 [conn1] end connection 127.0.0.1:50188 (0 connections now open)

EDIT Logs from Node.js:

[nodemon] starting `node ./server/server.js`
{ MongoNetworkError: failed to connect to server [127.0.0.1:27017] on first connect [MongoError: Server at 127.0.0.1:27017 reports maximum wire version 0, but this version of the Node.js Driver requires at least 2 (MongoDB 2.6)]
    at Pool.<anonymous> (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/topologies/server.js:431:11)
    at Pool.emit (events.js:198:13)
    at connect (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/connection/pool.js:557:14)
    at callback (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/connection/connect.js:109:5)
    at runCommand (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/connection/connect.js:140:7)
    at Connection.messageHandler (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/connection/connect.js:334:5)
    at Connection.emit (events.js:198:13)
    at processMessage (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/connection/connection.js:364:10)
    at Socket.<anonymous> (/home/pi/Desktop/Ordry API/node_modules/mongodb-core/lib/connection/connection.js:533:15)
    at Socket.emit (events.js:198:13)
    at addChunk (_stream_readable.js:288:12)
    at readableAddChunk (_stream_readable.js:269:11)
    at Socket.Readable.push (_stream_readable.js:224:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)
  name: 'MongoNetworkError',
  errorLabels: [ 'TransientTransactionError' ],
  [Symbol(mongoErrorContextSymbol)]: {} }

Conclusion

I am a bit unsure why it is not working here - especially as everything worked fine on windows.

I am using Raspbian on my Raspberry Pi 3b+.

Any help would be appreciated.

Why don't you log the error? console.log("Error connecting to the database!", error); It's a good practice to get more information. — Eduardo Yáñez Parareda
@EduardoYáñezParareda please take a look at my updated question. — linus_hologram

Ram Ram · Accepted Answer · 2019-07-18T11:44:37

usually this happens because you didn't start mongod process before you try starting mongo shell.

1) Delete mongod.lock file from C:\Program Files\MongoDB\Server\4.0\data

2) Start mongod server

In another terminal - start mongo shell

1) mongo

Node.js Server not connecting to local mongodb instance

Conclusion

2 Answers