I'm using Cloudera to set up my hadoop cluster. I've got HBASE up and running, but when I navigate to the hbase web UI, I see that some of the region server URLs are screwy. Seems like the DNS isn't resolving right for some of the hosts. But when I do a nslookup or dig, the results are the same for all the hosts, yet some of them don't display correctly. Anyone have any idea what is going on?
/etc/hostsfiles on all your nodes are right, and then check to see that your DNS is resolving properly. – Donald Miner