Hey guys. I got a problem with my server, it crashs at random times. Pastebin Console Crash Log: http://pastebin.com/cgRCMtm2 Does anyone know what it can be ? Plugins: GroupManager, WorldEdit, NoCheatPlus, mcore, WorldGuard, dynmap, Dynmap-WorldGuard, AutoMessage, PerformanceMonitor, CoreProtect, BanVote, ProtocolLib, AutoSaveWorld, mcMMO, Essentials, EssentialsProtect, Dynmap-Essentials, EssentialsSpawn, EssentialsGeoIP, EssentialsChat, Factions, Dynmap-Factions, Vault, RealJobs, WebAuctionPlus, LWC, CraftBook I haven't changed anything at the timing. P.S: There is no crash report from Minecraft located in the crash-reports directory. Edit 1: A player of my server said, as soon as he kill a zombie with any weapon the server crashes.