I am seeing a weird MySQL warning in Windows server event viewer. The error says : IP Address 'xx.xx.xx.xx' could not be resolved: no such host is known.
Any idea what this means and how critical it is ?
Is MySQL attempting to do reverse resolution of the hostname of connecting clients' IP addresses? (And do those entries not exist?)
Try adding skip-name-resolve
to your MySQL configuration. If you don't need name resolution (no hostnames in the host specification of user accounts) then you may as well have it off.