/usr/share/maven-repo/org/kohsuke/stapler/stapler-adjunct-timeline/1.4/stapler-adjunct-timeline-1.4.jar is in libstapler-adjunct-timeline-java 1.4+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/kohsuke/stapler/stapler-adjunct-timeline/1.4/../../../../../../java/stapler-adjunct-timeline.jar