This is very dangerous to create a new thread every time. Sure makes it easy to DOS the system with survey votes. At the very least, this should be a submission to an ExecutorService that contains a thread pool.
You missed our note towards the end of the blog :). It says the same thing.
Ah and finally java guys reinvent something which has been in ruby for decades :P
Hahaha. Hope this thread doesn't become a Ruby/Java battlefield.