https://community.cloudera.com/t5/Support-Questions/FQDN-is-not-set-for-hosts-Any-issues-in-prod-environment/m-p/208928#M170885 <P>Dear <A rel="user" href="https://community.cloudera.com/users/1271/sheltong.html" nodeid="1271">@Geoffrey Shelton Okot</A></P><P>Many thanks for your kind response.</P><P>We are using DNS here and I would like to know if any Hadoop service is impacted if FQDN is not used.</P><P>Also, will it be a problem in any job execution or any where while using Hadoop?</P><P>Note: Everything is good with respect to DNS look up and I am worried whether hadoop usage will be impacted or not.</P> Wed, 06 Jun 2018 12:42:16 GMT sriramhadoop27 2018-06-06T12:42:16Z