“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

Appending the below to /etc/hosts may help:

127.0.0.1   localhost   yourhostname