When you use d2 instance type on AWS, ephemeral drives may need to be reformatted and /etc/hosts files should be all formatted with mkfs.
I’m starting this blog as a series of EC2 challenge with CDH.
http://www.cloudera.com/resources/recordedwebinar/five-tips-for-running-cloudera-on-aws.html
Next time, ephemeral drive with lsblk, fdisk, mkfs, and mount….
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.html