A DESCRIPTION OF THE REQUEST :
In Java 8u45 sun.awt.X11FontManager was made final. This causes application using OpenJDK Caciocavallo to crash, because sun.awt.peer.cacio.CacioFontManager extends X11FontManager.
A refactor the enables fixing the problem was made for Java 9:
Please backport this change to Java 8!
OpenJDK Caciocavallo links:
This is needed to enable running UI unit tests on Linux servers without X11 running.