I recently installed HDP 2.3 on a 3 node cluster on Amazon EC2. Things went through relatively smoothly but then for some reason the person who set up the nodes restarted them all, causing them all to come up with different internal hostnames. When Ambari loaded back up, everything was in a funky state since they were looking for hostnames that no longer existed. What is the best practice for setting up HDP to avoid this? Is there anything I can easily do at this point to recover the cluster I had already set up? Thanks!
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