Cannot resolve hostname for interface any from opmnctl

I ran into a problem when I was starting up my BiSystem this because an issue regarding the hostname

The error:

opmnctl status: opmn is not running.
opmnctl start: failed. Can not resolve <hostname> for interface any

I modify my /etc/hosts

according this note:

http://docs.oracle.com/cd/E14571_01/install.1111/b32474/common.htm#ASINS283

Separate the domain name from the localhost information like this:

127.0.0.1      localhost.localdomain localhost
ip    alex alexdb.oracle.com

Now my system is up and running.