/usr/share/java/plexus-i18n.jar is in libplexus-i18n-java 1.0-beta-10-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/codehaus/plexus/plexus-i18n/1.0-beta-10/plexus-i18n-1.0-beta-10.jar