Problem connection with local mongodb from nodejs: [Symbol(mongoErrorContextSymbol)]

Question

I'm creating nodejs server and connect it to local mongodb on EC2 instance. Connection with mongodb is error.

I've tried it on local machine and it ran well. I've tried use MongoAtlas successfully. But when try on EC2 instance, it shows the error message:

[email protected] start /home/ec2-user/workspace/rep01 node ./bin/www

mongdb://127.0.0.1:27017/telegram MongoDb connection error { MongoParseError: Invalid connection string at parseConnectionString (/home/ec2-user/workspace/rep01/node_modules/mongodb-core/lib/uri_parser.js:412:21) at connect (/home/ec2-user/workspace/rep01/node_modules/mongodb/lib/operations/mongo_client_ops.js:180:3) at connectOp (/home/ec2-user/workspace/rep01/node_modules/mongodb/lib/operations/mongo_client_ops.js:284:3) at executeOperation (/home/ec2-user/workspace/rep01/node_modules/mongodb/lib/utils.js:420:24) at MongoClient.connect (/home/ec2-user/workspace/rep01/node_modules/mongodb/lib/mongo_client.js:168:10) at Promise (/home/ec2-user/workspace/rep01/node_modules/mongoose/lib/connection.js:521:12) at new Promise () at NativeConnection.Connection.openUri (/home/ec2-user/workspace/rep01/node_modules/mongoose/lib/connection.js:518:19) at Mongoose.connect (/home/ec2-user/workspace/rep01/node_modules/mongoose/lib/index.js:270:15) at Object. (/home/ec2-user/workspace/rep01/app.js:16:10) at Module._compile (internal/modules/cjs/loader.js:689:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10) at Module.load (internal/modules/cjs/loader.js:599:32) at tryModuleLoad (internal/modules/cjs/loader.js:538:12) at Function.Module._load (internal/modules/cjs/loader.js:530:3) at Module.require (internal/modules/cjs/loader.js:637:17) name: 'MongoParseError', [Symbol(mongoErrorContextSymbol)]: {} }

I tried to reinstall mongodb, but not work. Mongodb version is v4.0.5 Please help me with this. Thank you!

can you add code as well with your connection string with this error, i can only tell you which connection string you have provided for connection is not valid means there mongo not running — Shailesh Dudhat
– Shailesh Dudhat, Commented Jan 6, 2019 at 11:14
I used 'mongo' and it works. Here's the code: const mongoose = require("mongoose"); const mongoDb = process.env.MONGODB_URI; mongoose.connect( mongoDb, { useNewUrlParser: true } ); mongoose.Promise = global.Promise; const db = mongoose.connection; db.on("error", console.error.bind(console, "MongoDb connection error"));. Connection string: "mongodb://localhost:27017/telegram" — bkmsx
– bkmsx, Commented Jan 6, 2019 at 17:24

Mehedi Abdullah · Accepted Answer · 2019-02-03 11:23:40Z

3

Try this, This works for me, I got same erros because i tried to connect in wrong way. My previous code that produce the " 'MongoParseError', [Symbol(mongoErrorContextSymbol)]: {} }" error is -

mongoose.connect('mongodb://localhost/27017/creative-ideas', { useNewUrlParser: true })
    .then(() => console.log("Mongodb connected"))
    .catch(err => console.log(err));

The corrected code is:

mongoose.connect('mongodb://localhost:27017/creative_ideas', { useNewUrlParser: true })
    .then(() => console.log("Mongodb connected"))
    .catch(err => console.log(err));

answered Feb 3, 2019 at 11:23

Mehedi Abdullah

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Comments

Saad Mirza · Accepted Answer · 2019-10-16 10:02:46Z

0

DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Di scover and Monitoring engine, pass option { useUnifiedTopology: true } to the Mo ngoClient constructor.

so the correct code is

mongoose.connect('mongodb://localhost:27017/usercrud', { useNewUrlParser: true, useUnifiedTopology: true  })
.then(() => console.log("Mongodb connected"))
.catch(err => console.log(err));

answered Oct 16, 2019 at 10:02

Saad Mirza

1,19716 silver badges23 bronze badges

Comments

Lex · Accepted Answer · 2019-01-10 22:19:09Z

-1

You can follow this link for instructions to connect your node.js with the MongoDB.

On example is

//with using the promise
mongoose.connect(uri,options).then(() => {
  //connection established successfully
}).catch(error){
  //catch any error during the initial connection
}

edited Jan 10, 2019 at 22:19

Lex

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answered Jan 10, 2019 at 16:35

Sachin Jaiswal

1511 silver badge9 bronze badges

1 Comment

Lex Over a year ago

Link answers aren't ideal, if the link changes the answer is no longer relevant. If providing a link it's good practice to copy any meaning details into your answer.

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