Fix behavior with unspecified domain name
Fix behavior with unspecified domain name

Ensure string is only checked if it is a string.

jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,xcat2/confluent,jjohnson42/confluent