/usr/share/netbeans/java5/modules/ext/eclipselink/javax.persistence_2.1.0.v201304241213.jar is in libnb-java5-java 8.1+dfsg3-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/netbeans/java5/modules/ext/eclipselink/../../../../../java/eclipselink-jpa-2.1-spec.jar