Bukkit

voici l'erreur dans les logs quand je fait un quake reload:
23.12 15:07:56 [Server] WARN at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134)
23.12 15:07:56 [Server] WARN at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147)
23.12 15:07:56 [Server] WARN at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:65)
23.12 15:07:56 [Server] WARN at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28)
23.12 15:07:56 [Server] WARN at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:815)
23.12 15:07:56 [Server] WARN at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:940)
23.12 15:07:56 [Server] WARN at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:546)
23.12 15:07:56 [Server] WARN at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:196)
23.12 15:07:56 [Server] WARN at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
23.12 15:07:56 [Server] WARN at com.Geekpower14.Quake.Commands.MyCommandExecutor.onCommand(MyCommandExecutor.java:128)