can't connect to mysql using nodejs

Question

i am new to nodejs ,while creating a connection to the database i got this errors

C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\Parser.js:80 throw err; // Rethrow non-MySQL errors ^

Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'Root'@'localhost' (using password: YES) at Handshake.Sequence._packetToError (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\sequences\\Sequence.js:52:14) at Handshake.ErrorPacket (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\sequences\\Handshake.js:103:18) at Protocol._parsePacket (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\Protocol.js:279:23) at Parser.write (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\Parser.js:76:12) at Protocol.write (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\Protocol.js:39:16) at Socket. (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\Connection.js:103:28) 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 Protocol._enqueue (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\Protocol.js:145:48) at Protocol.handshake (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\protocol\\Protocol.js:52:23) at Connection.connect (C:\\Users\\devashis khandelwal\\node_modules\\mysql\\lib\\Connection.js:130:18) at Object. (C:\\Users\\devashis khandelwal\\node files\\demo_db_connection.js:9:5) at Module._compile (module.js:570:32) at Object.Module._extensions..js (module.js:579:10) at Module.load (module.js:487:32) at tryModuleLoad (module.js:446:12) at Function.Module._load (module.js:438:3) at Module.runMain (module.js:604:10)

 var mysql = require('mysql'); var con = mysql.createConnection({ host : 'localhost', user : 'Root', password : 'my_pass', }); con.connect(function(err) { if (err) throw err; console.log("Connected!"); });

Answer 1

You are connecting with user Root , I believe it is root . Your error is clearly a credentials error.

Answer 2

Error: ER_ACCESS_DENIED_ERROR: it's occurred because of permission.

As far as I understand your above code you need to change Root to root

var mysql = require('mysql');

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

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

Answer 3

Had a similar issue where I was able to login using the CLI with same creds, but didn't work with mysql2 in nodejs ( mysql-server 8.0 ). Solved it by using % in place of localhost :

CREATE USER 'user'@'%' IDENTIFIED WITH mysql_native_password BY 'password';
GRANT ALL PRIVILEGES ON db.* TO 'user'@'%';

instead of

CREATE USER 'user'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
GRANT ALL PRIVILEGES ON db.* TO 'user'@'localhost';