So I downloaded the hortonworks centos sandbox, and I wanted to add new nodes to the cluster. I installed an Ubuntu virtual machine with Java, ntp, ssh, build-essential, firewall off, transparent huge pages off, ambari-agent set up and running. Edited the /etc/hostname on Ubuntu to Hadoop.example.com, added both the sandbox hostname/ip address and Ubuntu hostname/ip address to the /etc/hosts file on both machines. Also configured the /etc/ambari-agent/conf/ambari-agent.ini configuration to have hostname be the sandbox. However, I'm still getting registration with the server failed. Any clues?
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