https://community.cloudera.com/t5/Support-Questions/ERROR-namenode-NameNode-NameNode-java-main-1783-Failed-to/m-p/181955#M144126 <P>This error states that NN is unable to determine the KDC server for kerberos authentication. Can you please validate your /etc/krb5.conf and that has got the realms pointing to your AD server?</P> Wed, 11 Jul 2018 09:28:58 GMT dchander 2018-07-11T09:28:58Z