/usr/share/doc/libxmlrpc3-server-java/changelog.Debian.gz is in libxmlrpc3-server-java 3.1.3-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libxmlrpc3-server-java/../libxmlrpc3-common-java/changelog.Debian.gz