I've had this problem for weeks on my server now. Server spontaneously crashes for no reason, producing this error message in console: http://pastebin.com/iggQnTz7 And this error log: http://pastebin.com/MSNBXL3t I did post this thread a while ago, but I've come closer to finding a possible cause. There seems to be a small area in one of my worlds where if people walk there, the server simply pukes and shuts down. Whether you teleport there, fly in, log in, or walk there, it does not matter. Server crashes. For security reasons, I won't say where this area is. Could someone elaborate on why this is happening and how I can stop it? I'm just considering putting a ton of solid blocks around the area until the issue is solved. Also, resetting the map is not an option. There is too much valuable stuff on this map.