The link is not working. I tried to generate the javadoc locally on the 1.3.3 server using "mvn javadoc:javadoc" command. But the javadoc is not generating inside the target/site folder.
This is issue #875 - it appears to have been caused by an upgrade to Jenkins, and I don't have the necessary credentials to fix it. I'm working with the sysadmin at Minnesota on this - should be fixed in a couple days. In the meantime, you can just run the javadoc:javadoc goal in maven to get a local copy - the result should show up inn target/site.