Tried it on 2 PCs, both with Windows 7. Same result, even with the modifications you suggestions.
Since we started observing this, we installed CurrPorts, at http://www.nirsoft.net/utils/cports.html, in order to monitor and stop any such connections, manually.
When we Stop the application, and refresh the Currports screen, the connection is clearly still active.
You have the right version. I did some research and found that this is an issue with xmonad and Java. It looks like there may be a workaround by exporting an environment variable: