/usr/share/netbeans/platform18/modules/ext/org.eclipse.osgi_3.9.1.v20140110-1610.jar is in libnb-platform18-java 8.1+dfsg1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/netbeans/platform18/modules/ext/../../../../java/org.eclipse.osgi.jar