I am installing cluster on AWS (Centos AMI) with 6 nodes ( 3 Master and 3 Worker) , getting Host failed to register for Master 1 and Master 3, no logs. ( Master 2, Worker 1-3 all registered except Master 1/3)
Would appreciate for any help.
Upload the ambari-server logs!
Thanks Geoffery, problem resolved, hostname was not set properly, typo error (hostnamectl set-hostname master3.hadoop.com )