Bukkit problem?

Hi, I have a friend with a bukkit server and he has a problem: The console shows this: "warning dsct: socket closed
closing listening thread" We dont know what could be the problem, so, we are looking for some help.
The plugins he has in the server are:
Plugins (34): Orebfuscator, bPermissions, MultiInv, WorldEdit, A
sknSelfPromote, BOSEconomy, Vault, SimpleHelpTickets, Multiverse-Core, CombatTag, SafeCreeper, Paintball, WorldGuard, TreeAssist, Jail, NarrowtuxLib, CreeperNotify, ServerJobs, SurvivalGames, xAuth, CraftBukkitUpToDate, ZavAutoMessager, Lockette, MobArena, MobHealth, Essentials, Lift, Citizens, Transporter, EssentialsProtect, EssentialsSpawn, Golfcraft, EssentialsAntiBuild, EssentialsChat
I hope you can help us.
Thanks

 

It means the socket has been closed. You would normally only see it when you shut down your server, and is nothing to worry about.

 

Ok, thanks very much, we were thinking that it was a bukkit bug or something like that, so thanks.

 

Not a bug at all. Just stating what is going on when the server shuts down.