I've been trying to find a solution through some searching but haven't found a definite solution yet. Does anyone have any ideas/solutions? I've read that it might be from being too close to nether portals to having wraith lamps near by. Here's a pastebin of the crash. It seems to happen in a specific area too.
http://pastebin.com/qfj1uKNW
http://pastebin.com/qfj1uKNW