Host ‘host_name’ is blocked because of many connection errors. Unblock with ‘mysqladmin flush-hosts
I got this error message when I was setting up a MariaDb Cluster and I don’t finish it properly. But don’t worry, for fix this error just run the next command on your database server:
mysqladmin flush-hosts -u root -p
Source http://cmanios.wordpress.com/2013/04/19/mysql-connect-error-1129/
