Hi @Ashnee Sharma Thank You for the reply. This way I fixed the hostname. As user “root” “vi /etc/sysconfig/network”, change HOSTNAME value to the new hostname “hostname NEW_HOST_NAME” to change it for the current sessions “vi /etc/hosts”, change the old value to point to the new hostname “service network restart” to restart the networking service and apply all the new changes. and the error got resolved. ... View more

Hi @jk Thanks for the reply. for the first command am getting the following output. [root@ankushHorton ~]# hostname -f hostname: Unknown host I don't know if that looks good. I did followed the step by step process. And from step:2 on wards I did them couple of times. 2. ambari-server reset 3. ambari-server setup Or as last option try re-instaling ambari 3. yum remove ambari-server 4. yum install ambari-server 5. ambari-server setup ... View more