How to fix java.awt.HeadlessException in Jenkins on Linux

Question

I use some AWT code in my Java app which ran fine until I unit tested it on Linux Mint Debian Edition via Jenkins and Gradle: I now get that nasty java.awt.HeadlessException which is explained here.

The unsuccessful unit test causes my build to fail; how do I fix that?

Answer 1

These are the steps that rid me of the HeadlessException:

1. Add the Xvnc plugin to Jenkins
2. Install VNC: sudo apt-get update && sudo apt-get install vnc4server
3. Make sure Jenkins has a shell: sudo usermod -s /bin/bash jenkins
4. Log in as Jenkins: sudo su jenkins
5. Enter the command vnc4server and choose a password
6. Tick Run Xvnc during build in Jenkins' build config