How to Fix \'Unable to Load Authentication Plugin \'caching_sha2_password\'\' MySQL Error?

Unable to Load Authentication Plugin 'caching_sha2_password': Error Resolution

The error "Could not discover the dialect to use. java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'." occurs when the application is unable to establish a connection with the MySQL database due to an authentication plugin mismatch.

Starting with MySQL version 8.0.4, the default authentication plugin for the MySQL server has changed from "mysql_native_password" to "caching_sha2_password." This implies that the connection attempts must use the "caching_sha2_password" plugin to successfully authenticate with the database.

Solution:

To resolve the issue, you need to modify the MySQL user account to use the "mysql_native_password" plugin instead. You can do this by running the following command:

ALTER USER 'username'@'hostname' IDENTIFIED WITH mysql_native_password BY 'password';

Replace "username" with the database user account, "hostname" with the host from which the connection is being made (e.g., 'localhost'), and "password" with the user's password. This command will alter the specified user account to use the "mysql_native_password" plugin, enabling a successful connection.

Additional Notes:

• If you need to maintain compatibility with older versions of MySQL, you can create a new user account using the "mysql_native_password" plugin using the following command:

CREATE USER 'username'@'hostname' IDENTIFIED WITH mysql_native_password BY 'password';

• Refer to the [MySQL Reference Manual](https://dev.mysql.com/doc/mysql-security-excerpt/8.0/en/mysql-users.html) for more details on user management and authentication plugin options.

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