MySQL 5.6  logs may contain a “Note” message that the RSA private key file not found … and [s]ome authentication plugins will not work. There is a resolution to this. Log Entries 2019-11-12 21:22:15 897 [Note] RSA private key file not found: /var/lib/mysql//private_key.pem. Some authentication plugins will not work. 2019-11-12 21:22:15 897 [Note] RSA public key file not found: /var/lib/mysql//public_key.pem….