Mysterious errors started plauging the server :(

Today my server went crazy, producing strange errors and crashes. This is the first time I've seen such an error:

http://pastebin.com/Nh7pE00v

Any ideas at all? Could this be connected to flood attacks from hackers (since I've been threatened with that kind of thing a number of times already)?


9:42:28 PM [INFO] Plugins (50): GroupManager, DropHead, mcjobs, Reforestation, AutoGamemode, Vault, Multiverse-Core, EnchantBeGone, Permissions, OpenInv, ChestShop, InfinityDispenser, Seasons, mcMMO, MobArena, SecureChests, StealthLogin, TexturePackChanger, NoEntityGrief, AnvilBlock, PTweaks, NoCheatPlus, WorldEdit, AntiBot, MotdManager, AppleNerf, BCleaner, EnchantLimiter, PermissionsEx, Minigames, CraftBukkitUpToDate, ScheduledAnnouncer2, AutoRespawn, LiquidControl, Modifyworld, InfiniArrow, tekkitrestrict, Essentials, Multiverse-Portals, ChatTweeks, EssentialsChat, EssentialsXMPP, EssentialsProtect, EssentialsSpawn, VirtualPack, EssentialsGeoIP, EssentialsAntiBuild, Factions, CombatLog



Bukkit ver: Latest beta (1.4.7-R.0.1 #2602)

Thanks for reading!

 

Try removing/updating combatlog

 

Thanks, I had not noticed that it was there and I had some errors with it earlier but I thought it was fixed. The downside is that there aren't any anti-logout plugins which are up-to-date currently... :/