There are few link related issues:
URL: http://download.java.net/jdk8/docs/api/overview-summary.html
Broken Link: http://cgi.omg.org/
There are many occurrences of the above url
error Lines: 1403, 1487 http://cgi.omg.org/cgi-bin/doc?ptc/2000-08-06
http://cgi.omg.org/cgi-bin/doc?formal/99-10-07
List of redirects
The links below are not broken, but the document does not use the exact URL, and the links were redirected. It may be a good idea to link to the final location, for the sake of speed.
warning Line: 1551 http://java.sun.com/xml redirected to http://www.oracle.com/technetwork/java/index.html
Status: 301 -> 200 OK
This is a permanent redirect. The link should be updated.