[TOMCAT] Unable to set localhost

# sudo vim /etc/hosts 

 If /etc/hosts doesn't containt the definition of the hostname it fails. Just add your hostname to /etc/host for example if your hostname is work add or modified the following line:

127.0.0.1   work        localhost

source: http://stackoverflow.com/questions/4969156/error-java-net-unknownhostexception