“hadoop namenode -format” returns a java.net.UnknownHostException

Question

I\'m currently learning hadoop and I\'m trying to setup a single node test as defined in http://hadoop.apache.org/common/docs/current/single_node_setup.html

I\'ve co

Answer 1

First get the host name of your computer. It can be obtained by running $hostname command. Then add 127.0.0.1 localhost hostname into the /etc/hosts file. That should solve the problem.