MongoDB URI String not working

[Blake254]

I am trying to change the URI in development.js from:

`
'use strict';

module.exports = {
env: 'development',
https: false,
port: process.env.PORT || 3000,
mongo: {
uri: 'mongodb://localhost/pisignage-dev',
options: {useMongoClient: true}
}
};
`

To use:

`
'use strict';

module.exports = {
env: 'development',
https: false,
port: process.env.PORT || 3000,
mongo: {
uri: 'mongodb://[username]:[password]@cluster0.a0oba.mongodb.net/db?retryWrites=true&w=majority'
,
options: {useMongoClient: true}
}
};
`

And it keeps telling me that the mongo db process is not running and stops the server, any ideas?

[hitesh83]

Mongodb service either not installed or not enabled in your server OS.

Please provide below info
1- Server OS
2- mongo version and how it was installed.
3- error when you run mongod manually.

And hope you have access to your mongo server given in URI.

[colloqi]

in the file server.js (pisignage-server directory) at line 21, add console.log to see the error as shown, also you can avoid program exit if needed.

mongoose.connect(config.mongo.uri, config.mongo.options,function(error){
if (error) {
console.log(error); //ADD this line
console.log('');
console.log('* MongoDB Process not running *');
console.log('\n');

     process.exit(1);    //COMMENT this line if you do not want to exit
}

});

[Blake254]

The error that is logged is below. I know that the connection string works that is used is not incorrect as I can successfully connect via MongoDB Compass.

Error [MongoError]: failed to connect to server [cluster0.a0oba.mongodb.net:27017] on first connect [Error: getaddrinfo ENOTFOUND cluster0.a0oba.mongodb.net
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:67:26) {
  name: 'MongoError'
}]
    at Pool.<anonymous> (C:\Users\USER\Desktop\Pi\pidev2\pisignage-server\node_modules\mongodb-core\lib\topologies\server.js:336:35)
    at Pool.emit (events.js:315:20)
    at Connection.<anonymous> (C:\Users\USER\Desktop\Pi\pidev2\pisignage-server\node_modules\mongodb-core\lib\connection\pool.js:280:12)
    at Object.onceWrapper (events.js:422:26)
    at Connection.emit (events.js:315:20)
    at Socket.<anonymous> (C:\Users\USER\Desktop\Pi\pidev2\pisignage-server\node_modules\mongodb-core\lib\connection\connection.js:189:49)
    at Object.onceWrapper (events.js:422:26)
    at Socket.emit (events.js:315:20)
    at emitErrorNT (internal/streams/destroy.js:106:8)
    at emitErrorCloseNT (internal/streams/destroy.js:74:3)
    at processTicksAndRejections (internal/process/task_queues.js:80:21)
(node:12236) UnhandledPromiseRejectionWarning: MongoError: failed to connect to server [cluster0.a0oba.mongodb.net:27017] on first connect [Error: getaddrinfo ENOTFOUND cluster0.a0oba.mongodb.net
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:67:26) {
  name: 'MongoError'
}]
    at Pool.<anonymous> (C:\Users\USER\Desktop\Pi\pidev2\pisignage-server\node_modules\mongodb-core\lib\topologies\server.js:336:35)
    at Pool.emit (events.js:315:20)
    at Connection.<anonymous> (C:\Users\USER\Desktop\Pi\pidev2\pisignage-server\node_modules\mongodb-core\lib\connection\pool.js:280:12)
    at Object.onceWrapper (events.js:422:26)
    at Connection.emit (events.js:315:20)
    at Socket.<anonymous> (C:\Users\USER\Desktop\Pi\pidev2\pisignage-server\node_modules\mongodb-core\lib\connection\connection.js:189:49)
    at Object.onceWrapper (events.js:422:26)
    at Socket.emit (events.js:315:20)
    at emitErrorNT (internal/streams/destroy.js:106:8)
    at emitErrorCloseNT (internal/streams/destroy.js:74:3)
    at processTicksAndRejections (internal/process/task_queues.js:80:21)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12236) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12236) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[Blake254]

Issue solved. URI needed to be:

uri: 'mongodb+srv://[username]:[password]@cluster0.a0oba.mongodb.net/db?retryWrites=true&w=majority'

Was not working because MongoDB was out of date. If you want to use the mongodb+srv:// version then you need a driver of version 3.0.0 or higher.