How to Fix 'Error: Client does not support authentication protocol requested by server' in MySQL?

Upgrading MySQL Client to Resolve "Error: Client does not support authentication protocol requested by server"

When attempting to connect to a database, an error message indicating "Client does not support authentication protocol requested by server" often arises. This error stems from the client's inability to utilize the authentication protocol employed by the server. To remedy this issue, upgrading the MySQL client is necessary.

Upon encountering this error, initial attempts were made to grant privileges to the user. However, subsequent errors were encountered when executing the following command:

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'mypassword';

This error is caused by using an outdated version of MySQL Connector/J (5.1.45 or earlier). MySQL 8 has implemented a new authentication mechanism (caching_sha2_password) that is not supported by these versions.

The solution lies in upgrading to MySQL Connector/J 5.1.46 or later. The latest version at the time of writing is 8.0.15, which can be downloaded from https://dev.mysql.com/downloads/connector/j/. Alternatively, the correct version can be specified in Maven/Gradle.

By upgrading the MySQL client, compatibility is ensured with the latest authentication protocol, eliminating the "Error: Client does not support authentication protocol requested by server".

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