message from server: "Host '114.242.17.65' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"
Such an error occurs because the maximum number of incorrect connections of mysql is blocked due to too many errors in connecting to the database with the same ip;
Simple and effective method:
Use: mysql -u root -p to enter mysql;
Then execute flush hosts; //The maximum number of errors connected to clean up zero;
Then you can connect;
It is said that there is a second method: restart the mysql service, I have not tried it