Jenkins infrastructure is continuously improving.
The latest service to get some attention and major improvement is the Jenkins javadoc.
There were a number of issues affecting that service:
Irregular updates -
Developers wouldn’t find the latest java documentation because of inadequate update frequence.
Broken HTTPS support -
when users would go to the Javadoc site they would get an unsafe site warning and then an incorrect redirection.
Obsolete content - Javadoc...