Randomly: Exception in server tick loop

I have absolutely no idea why this happens, but randomly when an person joins my server, my server crashes. Sometimes in console I can see an player has joined, but sometimes even that doesn't appear. This started to happen when updating to #2953.

I added an attachment to see the crash error report:
crash-2013-12-11_20.09.41-server.txt

Pluginlist:
AutoGamemode
AutoMessage
ColorMe
EnchantBroadcaster
MultiInv
Multiverse-Core-2.5
Multiverse-Portals-2.4
NoCheatPlus
Orebfuscator
PermissionsBukkit-2.1
ProfainityBlock
ProtocolLib-3.0.0-SNAPSHOT
TuxTwoLib
Vault
WorldEdit
WorldGuard
xAuth

ALL PLUGINS ARE UP-TO-DATE.

Thanks for help! =)

 

Keep checking the plugins pages for updates (also dev builds) because 1.7.2 might lead to stuff popping up late, plugins digging into CB/NMS internals will have their difficulties. Though here xAuth could be in focus first, because it seems the server kind of stopped with an xAuth database query or something like that, did you post the crash log on the plugins page yet?

 

Yes I did. Hopefully they read it.