I am trying to rename hostname of nodes in my cluster by following Renaming a Node.
Below steps I did,
1. Edited HOSTNAME property in /etc/sysconfig/network
2. Changed the hostname in /etc/hosts and /etc/hostname files.
3. Ran "hostname newhostname" command
4. Ran "/etc/init.d/network restart"
After doing that I got No Nodes In Volume Topology Alarm Error in MCS and While submitting a job to YARN I got Caused by: java.net.UnknownHostException: newhostname: Name or service not known Exception
Please help to understand the issue.