Mon serveur minecraft crash sans arret

Bonjour,


Voila jai un serveur minecraft heberger chez minecraft-illimity et il crash sans arret j'aimerai savoir pourquoi Merci !!! Voila mon serveur .log :

2012-06-13 18:12:44 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2012-06-13 18:12:55 [INFO] [PLAYER_COMMAND] zachoux: /tpa
2012-06-13 18:13:22 [WARNING] Alcatrak was denied access to command.
2012-06-13 18:13:25 [INFO] hello [82.249.20.198] try to connect to the server
2012-06-13 18:13:25 [INFO] hello /37.59.1.33:58041 logged in with entity id 61051 at ([world] 58.19565396753154, 64.0, 581.1461160203363)
2012-06-13 18:13:29 [INFO] [PLAYER_COMMAND] zak: /tp Octave001
2012-06-13 18:13:31 [INFO] <**worms M B C [Villageois] hello> IZ etait co ?
2012-06-13 18:13:38 [INFO] Read timed out
2012-06-13 18:13:38 [INFO] ETIENNE lost connection: disconnect.endOfStream
2012-06-13 18:13:41 [INFO] <*AntiZerk M C B [Villageois] zachoux> yes
2012-06-13 18:13:43 [INFO] <**AntiZerk M C [Admin] furiax> Oui
2012-06-13 18:13:49 [INFO] <**AntiZerk M C [Admin] furiax> pk?
2012-06-13 18:13:52 [INFO] ETIENNE [78.222.4.1] try to connect to the server
2012-06-13 18:13:52 [INFO] ETIENNE /37.59.1.33:58054 logged in with entity id 63248 at ([world] -43.82861016855556, 64.0, 502.38689447065315)
2012-06-13 18:14:03 [INFO] [Rakamak] ETIENNE is identified.
2012-06-13 18:14:04 [INFO] [PLAYER_COMMAND] Alcatrak: /tp or omar
2012-06-13 18:14:04 [WARNING] Alcatrak was denied access to command.
2012-06-13 18:14:32 [INFO] Connection reset
2012-06-13 18:14:32 [INFO] ETIENNE lost connection: disconnect.overflow
2012-06-13 18:14:36 [INFO] Read timed out
2012-06-13 18:14:36 [INFO] hello lost connection: disconnect.endOfStream
2012-06-13 18:14:37 [INFO] Read timed out
2012-06-13 18:14:37 [INFO] Read timed out
2012-06-13 18:14:37 [INFO] zachoux lost connection: disconnect.endOfStream
2012-06-13 18:14:37 [INFO] Read timed out
2012-06-13 18:14:37 [INFO] Read timed out
2012-06-13 18:14:37 [INFO] Read timed out
2012-06-13 18:14:37 [INFO] Read timed out
2012-06-13 18:14:37 [INFO] Octave001 lost connection: disconnect.endOfStream
2012-06-13 18:14:37 [INFO] Alcatrak lost connection: disconnect.endOfStream
2012-06-13 18:14:37 [INFO] furiax lost connection: disconnect.endOfStream
2012-06-13 18:14:37 [INFO] zak lost connection: disconnect.endOfStream
2012-06-13 18:14:41 [INFO] omar lost connection: disconnect.endOfStream
2012-06-13 18:14:41 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2012-06-13 18:14:42 [INFO] [Server] Arret du serveur dans 10 secondes! Sauvegarde..
2012-06-13 18:14:42 [INFO] CONSOLE: Forcing save..
2012-06-13 18:14:42 [INFO] CONSOLE: Save complete.
2012-06-13 18:14:52 [INFO] CONSOLE: Stopping the server..
2012-06-13 18:14:52 [INFO] Stopping server
2012-06-13 18:14:52 [INFO] [Factions] Disabling Factions v1.6.7
2012-06-13 18:14:52 [INFO] [Lockette] Disabled link to plugin Factions, version 1.6.7
2012-06-13 18:14:52 [INFO] [Factions v1.6.7] Disabled
2012-06-13 18:14:52 [INFO] [EssentialsChat] Disabling EssentialsChat v2.9.1
2012-06-13 18:14:52 [INFO] [EssentialsSpawn] Disabling EssentialsSpawn v2.9.1
2012-06-13 18:14:52 [INFO] [EssentialsProtect] Disabling EssentialsProtect v2.9.1
2012-06-13 18:14:53 [INFO] [Jobs] Disabling Jobs v2.8.3
2012-06-13 18:14:53 [INFO] [Jobs] Plugin has been disabled succesfully.
2012-06-13 18:14:53 [INFO] [ShowCaseStandalone] Disabling ShowCaseStandalone v0.79
2012-06-13 18:14:53 [INFO] [SCS] Stopping shop update task.
2012-06-13 18:14:53 [INFO] [SCS] Saving any remaining shop changes.
2012-06-13 18:14:53 [INFO] [SCS] Removing display items.
2012-06-13 18:14:53 [INFO] [Essentials]