Mongoose connect throwing some warning

[daverbj]

My connection string like this

mongodb://root:pass@127.0.0.1:27017/ai?authSource=admin

Everything working good but getting a wired message at the shell.

Db.prototype.authenticate method will no longer be available in the next major release 3.x as MongoDB 3.6 will only allow auth against users in the admin db and will no longer allow multiple credentials on a socket. Please authenticate using MongoClient.connect with auth credentials.

For what is this ?

[sobafuchs]

this is a duplicate of #5304

[kiupets]

Db.prototype.authenticate method will no longer be available in the next major release 3.x as MongoDB 3.6 will only allow auth against users in the admin db and will no longer allow multiple credentials on a socket. Please authenticate using MongoClient.connect with auth credentials.
MongoDB connection error: { MongoError: Authentication failed.
at Function.MongoError.create (C:\Users\gonza\Desktop\myapp\express-locallibrary-tutorial\node_modules\mongodb-core\lib\error.js:31:11)
at C:\Users\gonza\Desktop\myapp\express-locallibrary-tutorial\node_modules\mongodb-core\lib\connection\pool.js:497:72
at authenticateStragglers (C:\Users\gonza\Desktop\myapp\express-locallibrary-tutorial\node_modules\mongodb-core\lib\connection\pool.js:443:16)
at Connection.messageHandler (C:\Users\gonza\Desktop\myapp\express-locallibrary-tutorial\node_modules\mongodb-core\lib\connection\pool.js:477:5)
at Socket. (C:\Users\gonza\Desktop\myapp\express-locallibrary-tutorial\node_modules\mongodb-core\lib\connection\connection.js:321:22)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at TCP.onread (net.js:548:20)
name: 'MongoError',
message: 'Authentication failed.',
ok: 0,
code: 18,
errmsg: 'Authentication failed.' }

Can someone helllllp meeee!!!!

[ToTopNeo]

message: 'Authentication failed.',
ok: 0,
code: 18,
errmsg: 'Authentication failed.' }
all these messages shows you are not allowed to log in database , you can check user&passwd&database,

[UmarEhsan]

For Db.prototype.authenticate method will no longer be available Error try this.
var mongoose = require('mongoose');
mongoose.Promise = global.Promise;

mongoose.connect( "mongodb://username:password@ds125146.mlab.com:25146/dbName'", { useMongoClient: true } );

For MongoLab
Make sure you are using the database username and password not the account username and password from Mlab.
In MLab, formerly MongoLab, do the following
Navigate to Users
@add Database User
Choose your username and password

[vkarpov15]

Set useMongoClient: true and this warning will go away