/usr/share/jetty/lib/geronimo-jta-1.0.1b-spec.jar is in libjetty-extra-java 6.1.24-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/jetty/lib/../../java/geronimo-jta-1.0.1b-spec.jar
/usr/share/jetty/lib/../../java/geronimo-jta-1.0.1b-spec.jar