/usr/share/maven-repo/org/codehaus/plexus/plexus-compiler-api/2.4/plexus-compiler-api-2.4.jar is in libplexus-compiler-java 2.4-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/codehaus/plexus/plexus-compiler-api/2.4/../../../../../../java/plexus-compiler-api-2.x.jar