Abusers: get a life
Expecting some kind of hardware failure, I log in to the box only to notice it's the website's search engine database that's being pounded on. After finding and blocking the offending IP address in 1.3 second (it was kinda easy to spot) I whipped off an abuse e-mail to Time Warner Telecom, registered owners of the IP address' netblock. Oddly enough, the offending IP address maps not to APNIC (where most of our attacks come from) but to what appears to be a large Financial institution that "Make dreams come true", "protect families" and "secure future".
So this IP address issued a search for xdoclet-1.2.1.jar -- 7257 times. If anyone knows where to find this file, please let me know so I can tell them -- apparently they're looking for it. In the interim, I had to block their IP from accessing our site.
I'm not sure why these abuses and attacks occur -- especially when you're running a site that gives software and code for free. It's beyond me.