https://community.cloudera.com/t5/Support-Questions/FQDN-is-not-set-for-hosts-Any-issues-in-prod-environment/m-p/208927#M170884 <P><EM><A href="https://community.cloudera.com/@Sriram"> @Sriram</A><BR /></EM></P><P><I>FQDN is required if you are not using DNS/reverse DNS. </I></P><P><EM>See: <A href="http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.2.0/bk_Installing_HDP_AMB/content/_check_dns.html " target="_blank"> http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.2.0/bk_Installing_HDP_AMB/content/_check_dns.html </A></EM></P><P><EM>You can manage this by maintaining /etc/hosts but whenever IP changes </EM><I>in the environment </I><I>then you have to update the entries in the host file. </I></P><P><EM>FQDN is recommended for reasons like users does not need to have local /etc/hosts in their env to reach the cluster.</EM></P><P><I>Hope that helps</I></P> Tue, 05 Jun 2018 13:04:32 GMT Shelton 2018-06-05T13:04:32Z