[FIXED]Name or service not known: mod_unique_id: unable to find IPv4 address of ""

When you came to know about Apache service status is not running and while trying to restart, it failed and the Apache error logs showed following error

"[alert] (EAI 2)Name or service not known: mod_unique_id: unable to find IPv4 address of "server.example.com"
Configuration Failed"

Just check the Apache configuration syntax file by using command,

 # httpd -t
Syntax OK

This is Okay,

Now the issue will be on your " /etc/hosts ' file ,

# vi /etc/hosts

check the file and add your hostname.

after that, restart apache.

That's it. :-)