NodeJS/mySQL - ER_ACCESS_DENIED_ERROR Access denied for user 'root'@'localhost' (using password: YES)

Question

I am attempting to connect to mySQL through a NodeJS file, but I receive the following error:

{ Error: ER_ACCESS_DENIED_ERROR: Access denied for user \'root\         


        

Answer 1

The code to connect to mysql using dotenv in nodejs

          .env file

          NODE_ENV=DEVELOPMENT
          DB_HOST=localhost
          DB_USER=root
          DB_PASSWORD=password
          DB_NAME=test

              
           db.js file


           const util = require("util");
           const mysql = require("mysql2");

           const pool = mysql.createPool({
           host: process.env.DB_HOST,
           user: process.env.DB_USER,
           password: process.env.DB_PASSWORD,
           database : process.env.DB_NAME,
           uri: process.env.DB,
           waitForConnections: true,
           connectionLimit: 10,
           queueLimit: 2,
            });

Answer 2

The problem is not with the mysql user authentication. It just that you have to grant your node application to access mysql db. I was facing the same issue earlier.I added the port number on which my node application is running.And its working perfectly fine now.

Also user:"root" was written as username:"root" . Be careful with the spellings.

const mysqlConnection = mysql.createConnection({
host: "localhost",
user: "root",
password: "Pass@123",
database: "employees",
port:"3000",
multipleStatements: true

});

I am using mysql version "mysql": "^2.18.1".

Answer 3

Mostly the issue will be with the way the password entered is interpreted by MySQL server. Please follow the below link. It should resolve the issue. MySQL 8.0 - Client does not support authentication protocol requested by server; consider upgrading MySQL client

Answer 4

uninstall mysql,and uninstall mysql related service(eg. mysqld.exe xampp).then,reinstall mysql.

Answer 5

If anyone is still facing problem. Try

var mysql = require("mysql");
var con = mysql.createConnection({
  host: "127.0.0.1",
  user: "your_username",
  password: "password",
  database: "your_db_name"
});

Answer 6

//surprisingly this works.

var mysql = require('mysql');
var con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: ""
});

con.connect(function(err) {
  if (err) throw err;
  console.log("Connected!");
});