/usr/share/maven-repo/org/jboss/marshalling/river/debian/river-debian.jar is in libjboss-marshalling-java 1.1.3.GA-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/jboss/marshalling/river/debian/../../../../../../java/river-1.1.3.GA.jar