/usr/share/maven-repo/javax/websocket/javax.websocket-api/1.0/javax.websocket-api-1.0.jar is in libservlet3.1-java 8.0.32-1ubuntu1.8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/javax/websocket/javax.websocket-api/1.0/../../../../../java/websocket-api-1.0.jar