1. change you hostname, using vi or vim and then cat your hostname to be something like this
root@localhost:~# cat /etc/hostname localhost 2. because i am using debian i run hostname update script root@localhost:~# /etc/init.d/hostname.sh 3. signout and then sign in again 4. make sure your /etc/host like below root@localhost:~# cat /etc/hosts 127.0.0.1 localhost.localdomain localhost ::1 localhost ip6-localhost ip6-loopback 5. Resintall your jasperserver, uninstall first and then install again root@localhost:~# ./jasperreports-server-cp-4.7.0-linux-x64-installer.run you should be ok by now and it's magically fix it self
