/usr/share/java/plexus-active-collections.jar is in libplexus-active-collections-java 1.0~beta2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/codehaus/plexus/plexus-active-collections/1.0-beta-2/plexus-active-collections-1.0-beta-2.jar