One of you bastards must have made a script that was infinitely (or near enough) looping with some sort of error (possibly on multiple mobs, or spawning multiple multiple mobs).
The average log file on the server is maybe 2 - 10 kb. Sometimes in the 1000kb. The buildport's error log file alone was over 600,000kb and that was causing the server to run out of hard drive space so new players couldn't be created, and (far more importantly) I couldn't log in.
Good job champ, whoever you are. That said, wtf is this, the 90s. I've got two $10 usb drives on my keychain that are 16 GB each. Anyway, the port is down until someone with more time can start it up and figure out what exactly caused this. I'm sure it shouldn't be but half a day.