HBase Error - assignment of -ROOT- failure

Was a problem with the host file (/etc/hosts). Need to remove entries relating to 127.0.1.1 COMPNAME - just put a hash (#) in front of this line and then restart all hadoop and hbase services.

or this
your hosts file should look like this

#127.0.0.1  localhost
#127.0.1.1  ubuntu.ubuntu-domain    ubuntu
192.168.2.100   ubuntu
# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

This file can be found in /etc/hosts