/usr/share/maven-repo/org/codehaus/plexus/plexus-container-default/1.0-alpha/plexus-container-default-1.0-alpha.jar is in libplexus-container-default-java 1.0-alpha-9-stable-1-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/codehaus/plexus/plexus-container-default/1.0-alpha/../../../../../../java/plexus-container-default-alpha-1.0-alpha-9-stable-1.jar