I can't make a simple connection to the server for some reason. I install the newest MySQL Community 8.0 database along with Node.JS with default settings.

This is my node.js code

    var mysql = require('mysql');

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

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

Below is the error found in Command Prompt:

C:\Users\mysql-test>node app.js
    C:\Users\mysql-test\node_modules\mysql\lib\protocol\Parse
    r.js:80
            throw err; // Rethrow non-MySQL errors
            ^

Error: ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication protocol requested by server; consider upgrading MySQL client
    at Handshake.Sequence._packetToError (C:\Users\mysql-
test\node_modules\mysql\lib\protocol\sequences\Sequence.js:52:14)
    at Handshake.ErrorPacket (C:\Users\mysql-test\node_mo
dules\mysql\lib\protocol\sequences\Handshake.js:130:18)
    at Protocol._parsePacket (C:\Users\mysql-test\node_mo
dules\mysql\lib\protocol\Protocol.js:279:23)
    at Parser.write (C:\Users\mysql-test\node_modules\mys
ql\lib\protocol\Parser.js:76:12)
    at Protocol.write (C:\Users\mysql-test\node_modules\m
ysql\lib\protocol\Protocol.js:39:16)
    at Socket.<anonymous> (C:\Users\mysql-test\node_modul
es\mysql\lib\Connection.js:103:28)
    at Socket.emit (events.js:159:13)
    at addChunk (_stream_readable.js:265:12)
    at readableAddChunk (_stream_readable.js:252:11)
    at Socket.Readable.push (_stream_readable.js:209:10)
    --------------------
    at Protocol._enqueue (C:\Users\mysql-test\node_module
s\mysql\lib\protocol\Protocol.js:145:48)
    at Protocol.handshake (C:\Users\mysql-test\node_modul
es\mysql\lib\protocol\Protocol.js:52:23)
    at Connection.connect (C:\Users\mysql-test\node_modul
es\mysql\lib\Connection.js:130:18)
    at Object.<anonymous> (C:\Users\mysql-test\server.js:
11:5)
at Module._compile (module.js:660:30)
at Object.Module._extensions..js (module.js:671:10)
at Module.load (module.js:573:32)
at tryModuleLoad (module.js:513:12)
at Function.Module._load (module.js:505:3)
at Function.Module.runMain (module.js:701:10)

I've read up on some things such as: https://dev.mysql.com/doc/refman/5.5/en/old-client.html https://github.com/mysqljs/mysql/issues/1507

But I am still not sure how to fix my problem. Any help would be appreciated :D

Let's first make it clear what's going on.

MySQL 8 has supports pluggable authentication methods. By default, one of them named caching_sha2_password is used rather than our good old mysql_native_password (source). It should be obvious that using a crypto algorithm with several handshakes is more secure than plain password passing that has been there for 24 years!

Now, the problem is mysqljs in Node (the package you install with npm i mysql and use it in your Node code) doesn't support this new default authentication method of MySQL 8, yet. The issue is in here: https://github.com/mysqljs/mysql/issues/1507 and is still open, after 3 years, as of July 2019.

UPDATE June 2019: There is a new PR in mysqljs now to fix this!

UPDATE Feb 2020: Apparently it's scheduled to come in version 3 of mysqljs.

UPDATE July 2020: Apparently it's still not in yet (as of April 2020 at least), but it's claimed that node-mysql2 is supporting Authentication switch request. Please comment below if node-mysql2 is working fine for this issue -- I will test it later myself.

Your Current Options

Option 1) Downgrade "MySQL" to authenticate using good old "mysql_native_password"

That's what everybody suggests here (e.g. top answer above). You just get into mysql and run a query saying root is fine using old mysql_native_password method for authentication:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password ...

The good thing is, life is going to be simple and you can still use good old tools like Sequel Pro without any issue. But the problem is, you are not taking advantage of a more secure (and cool, read below) stuffs available to you.

Option 2) Replace "Node" package with MySQL Connecter X DevAPI

MySQL X DevAPI for Node is a replacement to Node's Mysqljs package, provided by http://dev.mysql.com official guys.

It works like a charm supporting caching_sha2_password authentication. (Just make sure you use port 33060 for X Protocol communications.)

The bad thing is, you have left our old mysql package that everyone is so used to and relies on.

The good thing is, your app is more secure now and you can take advantage of a ton of new things that our good old friends didn't provide! Just check out the tutorial of X DevAPI and you'll see it has a ton of new sexy features that can come in handy. You just need to pay the price of a learning curve, which expectedly comes with any technology upgrade. :)

PS. Unfortunately, this XDevAPI Package doesn't have types definition (understandable by TypeScript) yet, so if you are on typescript, you will have problems. I tried to generate .d.ts using dts-gen and dtsmake, but no success. So keep that in mind.

Cheers!

Using the old mysql_native_password works:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'YourRootPassword';
-- or
CREATE USER 'foo'@'%' IDENTIFIED WITH mysql_native_password BY 'bar';
-- then
FLUSH PRIVILEGES;

This is because caching_sha2_password is introduced in MySQL 8.0, but the Node.js version is not implemented yet. You can see this pull request and this issue for more information. Probably a fix will come soon!

Full Steps For MySQL 8

Connect to MySQL

$ mysql -u root -p
Enter password: (enter your root password)

Reset your password

(Replace your_new_password with the password you want to use)

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'your_new_password';
mysql> FLUSH PRIVILEGES;
mysql> quit

Then try connecting using node

Although the accepted answer is correct, I'd prefer creating a new user and then using that user to access the database.

create user nodeuser@localhost identified by 'nodeuser@1234';
grant all privileges on node.* to nodeuser@localhost;
ALTER USER 'nodeuser'@localhost IDENTIFIED WITH mysql_native_password BY 'nodeuser@1234';

If you encountered this error but still wanted to use MySQL version 8. You can achieve this by telling MySQL Server to use the legacy authentication plugin when you create the database using Docker.

So, your compose file will look like this:

# Use root/example as user/password credentials

version: '3.1'

services:

  db:
    image: mysql:8.0.15
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
       MYSQL_ROOT_PASSWORD: 'pass'
       MYSQL_DATABASE: 'db'
       MYSQL_USER: 'user'
       MYSQL_PASSWORD: 'pass'
    ports:
      - 3318:3306
    # Change this to your local path
    volumes:
      - ~/Database/ORM_Test:/var/lib/mysql

If the ALTER USER ... command line doesn't work for you AND if you are using Windows 10 then try to follow those steps:

1) Type MySQL in the windows search bar

2) Open the MySQL Windows Installer - Community

3) Look for "MySQL server" and click on Reconfigure

4) Click on "Next" until you reach the "Authentification Method" phase

5) On the "Authentification Method" phase check the second option "Use Legacy Authentication Method"

6) Then follow the steps given by the Windows installer until the end

7) When it's done, go into "Services" from the Windows search bar, click on "start" MySql81".

Now, try again, the connection between MySQL and Node.js should work!

In Mysql Latest docker container

ALTER USER root IDENTIFIED WITH mysql_native_password BY 'password';

In MySQL 8.0, caching_sha2_password is the default authentication plugin rather than mysql_native_password. ...

Most of the answers in this question result in a downgrade to the authentication mechanism from caching_sha2_password to mysql_native_password. From a security perspective, this is quite disappointing.

This document extensively discusses caching_sha2_password and of course why it should NOT be a first choice to downgrade the authentication method.

With that, I believe Aidin's answer should be the accepted answer. Instead of downgrading the authentication method, use a connector which matches the server's version instead.

Original documentation you can find here : https://dev.mysql.com/doc/dev/connector-nodejs/8.0/

'use strict';

const mysqlx = require('@mysql/xdevapi');

const options = {
  host: 'localhost',
  port: 33060,
  password: '******',
  user: 'root',
  schema: 'yourconference'
};

mysqlx.getSession(options)
  .then(session => {
          console.log(session.inspect());
           session.close();
  }).catch(err => {
    console.error(err.stack);
    process.exit(1);
  });

If you are using docker, it worked for me!

in the docker-compose.yml add the following lines:

mysql:
   ...    
   command: --default-authentication-plugin=mysql_native_password
   restart: always

after that, down the container and up again.

I have MYSQL on server and nodejs application on another server

Execute the following query in MYSQL Workbench

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'password'

For existing mysql 8.0 installs on Windows 10 mysql,

1. launch installer,

2. click "Reconfigure" under QuickAction (to the left of MySQL Server), then

3. click next to advance through the next 2 screens until arriving

4. at "Authentication Method", select "Use Legacy Authentication Method (Retain MySQL 5.x compatibility"

5. Keep clicking until install is complete

With MySQL 8+ the new default authentication is caching_sha2_password instead of mysql_native_password. The new and more secure authentication method is not supported by the native mysql package yet, but you should consider using the package @mysql/xdevapi instead, which is officially supported and maintained by Oracle.

To install the new package, run:

npm install @mysql/xdevapi --save --save-exact

To connect to the database and INSERT some VALUES:

const mysqlx = require('@mysql/xdevapi');
var myTable;

mysqlx
    .getSession({
        user: 'root',
        password: '*****',
        host: 'localhost',
        port: 33060
    })
    .then(function (session) {

    // Accessing an existing table
    myTable = session.getSchema('Database_Name').getTable('Table_Name');

    // Insert SQL Table data
    return myTable
        .insert(['first_name', 'last_name'])
        .values(['John', 'Doe'])
        .execute()
    });

The official package documentation can be found here: https://dev.mysql.com/doc/dev/connector-nodejs/8.0/

Downgrading might not be a good option as:

1. Its upgraded for a reason (To provide better authentication).
2. You might not have enough permissions to make such changes.

You can use mysql2 package in place of mysql. Its mostly API compatible with mysqljs. Also, it has promises support.

Use it like: const mysql = require('mysql2/promise') (for promise based methods)

You can read more about mysql2 here: https://www.npmjs.com/package/mysql2

Hope it helps. :)

I just run into this problem too, with all the MySQL re-config mentioned above the error still appears. It turns out that I misspelled the database name.

So be sure you're connecting with the right database name especially the case.

In addition to the above answers ; After executing the below command

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'

If you get an error as :

[ERROR] Column count of mysql.user is wrong. Expected 42, found 44. The table is probably corrupted

Then try in the cmd as admin; set the path to MySQL server bin folder in the cmd

set path=%PATH%;D:\xampp\mysql\bin;

and then run the command :

mysql_upgrade --force -uroot -p

This should update the server and the system tables.

Then you should be able to successfully run the below commands in a Query in the Workbench :

 ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'    

then remember to execute the following command:

flush privileges;

After all these steps should be able to successfully connect to your MySQL database. Hope this helps...

Check privileges and username/password for your MySQL user.

For catching errors it is always useful to use overrided _delegateError method. In your case this has to look like:

var mysql = require('mysql');

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

var _delegateError = con._protocol._delegateError;

con._protocol._delegateError = function(err, sequence) {
    if (err.fatal)
        console.trace('MySQL fatal error: ' + err.message);

    return _delegateError.call(this, err, sequence);
};

con.connect(function(err) {
  if (err) throw err;

  console.log("Connected!");
});

This construction will help you to trace fatal errors.

Just Run MySQL Server Installer and Reconfigure the My SQL Server...This worked for me.

You can skip the ORM, builders, etc. and simplify your DB/SQL management using sqler and sqler-mdb.

-- create this file at: db/mdb/read.table.rows.sql
SELECT TST.ID AS "id", TST.NAME AS "name", NULL AS "report",
TST.CREATED_AT AS "created", TST.UPDATED_AT AS "updated"
FROM TEST TST
WHERE UPPER(TST.NAME) LIKE CONCAT(CONCAT('%', UPPER(:name)), '%') 

const conf = {
  "univ": {
    "db": {
      "mdb": {
        "host": "localhost",
        "username":"admin",
        "password": "mysqlpassword"
      }
    }
  },
  "db": {
    "dialects": {
      "mdb": "sqler-mdb"
    },
    "connections": [
      {
        "id": "mdb",
        "name": "mdb",
        "dir": "db/mdb",
        "service": "MySQL",
        "dialect": "mdb",
        "pool": {},
        "driverOptions": {
          "connection": {
            "multipleStatements": true
          }
        }
      }
    ]
  }
};

// create/initialize manager
const manager = new Manager(conf);
await manager.init();

// .sql file path is path to db function
const result = await manager.db.mdb.read.table.rows({
  binds: {
    name: 'Some Name'
  }
});

console.log('Result:', result);

// after we're done using the manager we should close it
process.on('SIGINT', async function sigintDB() {
  await manager.close();
  console.log('Manager has been closed');
});

If you have access to create a new user privilege then do so to connect normally with node.js, that is worked for me

I had this error for several hours an just got to the bottom of it, finally. As Zchary says, check very carefully you're passing in the right database name.

Actually, in my case, it was even worse: I was passing in all my createConnection() parameters as undefined because I was picking them up from process.env. Or so I thought! Then I realised my debug and test npm scripts worked but things failed for a normal run. Hmm...

So the point is - MySQL seems to throw this error even when the username, password, database and host fields are all undefined, which is slightly misleading..

Anyway, morale of the story - check the silly and seemingly-unlikely things first!

Just figured this out after trying numerous things. What finally did it for me was adding require('dotenv').config() to my .sequelizerc file. Apparently sequelize-cli doesn't read env variables.

I have the same problem with MySQL and I solve by using XAMPP to connect with MySQL and stop the services in windows for MySQL (control panel - Administrative Tools - Services), and in the folder db.js (that responsible for the database ) I make the password empty (here you can see:)

const mysql = require('mysql');
const connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: ''
});

Make sure the user you are using to access your database has the privileges to do so.
GRANT ALL PRIVILEGES ON * . * TO 'user'@'localhost';
Where the first star can be replaced by database name, second star specifies table. Make sure to flush privileges after.