Is there any impact to RAC after /etc/hosts change?

Hi,

Due historical reason our environments has many different formats on /etc/hosts on many hosts. And at the same time, we are using DNS server.

The host name search sequence is /etc/hosts first, then DNS.

Format 1:

IP_Address     machine_name     machine_name.old_domain_name

Format 2:

IP_Address     machine_name     machine_name.old_domain_name      machine_name.new_domain_name

Format 3:

IP_Address     machine_name.old_domain_name     machine_name

Format 4:

IP_Address     machine_name.old_domain_name     machine_name.new_domain_name     machine

Format 5:

IP_Address     machine_name.new_domain_name     machine_name

We have done a clean action on all these mess and made them the same format: