How to change FQDN in added hosts in HDP cluster ?

[#1]

In my Ambari server I have added 40 slaves to the master, But the problem is I had changed the FQDN on slaves and master, therefore Master Node cannot identify the slaves now.

So can anyone help me to changed those FQDN which are already added?

Ambari server version is 2.1.2 in my cluster.

[#2 · Accepted solution]

@Hefei Li It is strongly recommended not to change hostname of nodes. This would need changes in Ambari database to reflect the change in Ambari. I would suggest reaching out to Hortonworks support to get engg. help based on specific Ambari and HDP version (Don't recommend trying it yourself to avoid DB inconsistencies) if you have HRWX support in place.

[#3]

Thank you for your advice. I will be careful.

[#4]

@Hefei Li we would recommend you remove the new nodes and re-add them again with new FQDNs. Cleaning up all of the issues from adding FQDN after provisioning is going to be messy.

[#5]

Thank you for your advice. I will be careful.