While running following command.

mysqladmin -i3 pr

We are getting result.

056 | unauthenticated user | localhost |    | Connect |      | Reading from net |

To avoid such problem add following lines in /etc/my.cnf file to avoid access for unauthenticated user.

root@server [~]# pico /etc/my.cnf

skip-networking
skip-name-resolve
skip-host-cache
skip-locking

Now restart the mysql service and check mysql process logs again.