How to resolve the “flush hosts” issue in MySQL?

In MySQL, the “flush hosts” statement is used to clear the host cache table in order to refresh the mapping of hostnames and IP addresses. If you encounter a “flush hosts” issue, you can try the following solutions:

1. Check permissions: Make sure you have enough permissions to execute the “flush hosts” command. Normally, only users with SUPER privileges can execute this command.
2. Check the syntax: Make sure you correctly enter the “flush hosts” command. In MySQL, syntax errors can prevent commands from being executed correctly.
3. Rebooting the MySQL service: Sometimes, restarting the MySQL service can solve some cache-related issues. Try restarting the MySQL service and then attempt executing the “flush hosts” command again.
4. Check the error log: review the MySQL error log to see if there are any error messages related to the “flush hosts” command. Take appropriate actions based on the error messages.

If none of the above methods work, further examination of MySQL configuration and network environment may be necessary, or consider reaching out to MySQL technical support for assistance.