/usr/share/maven-repo/org/jenkins-ci/memory-monitor/debian/memory-monitor-debian.jar is in jenkins-memory-monitor 1.5-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/jenkins-ci/memory-monitor/debian/../1.5/memory-monitor-1.5.jar