/usr/share/java/jgroups-all-2.6.jar is in libjgroups2.6-java 2.6.15.GA-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/jgroups-2.6.15.GA.jar
/usr/share/java/jgroups-2.6.15.GA.jar