Compatibility was a library consisting of several utility classes that Excalibur had ceased developing with the aim of focusing on the charter. Seems to be required by the latest jmeter. So is currently in java-experimental
http://excalibur.apache.org/ - 2010/12/15 - Apache Excalibur has been retired. http://attic.apache.org/projects/excalibur.html - Apache Excalibur moved into the Attic in December 2010. Apache Excalibur was a Java Inversion of control container. Let's kiss Excalibur goodbye. I'm also removing excalibur ebuilds from the overlays.