quarantine error1

2012-06-19 13:35:12 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'qjoin' in plugin Quarantine v0.7
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:479)
	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:821)
	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:781)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:764)
	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:34)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
	at org.bukkit.craftbukkit.CraftWorld.spawnCreature(CraftWorld.java:335)
	at me.DDoS.Quarantine.zone.location.SpawnLocation.spawnCreature(SpawnLocation.java:30)
	at me.DDoS.Quarantine.zone.subzone.SubZone.spawnMob(SubZone.java:81)
	at me.DDoS.Quarantine.zone.subzone.SubZone.spawnStartingMobs(SubZone.java:63)
	at me.DDoS.Quarantine.zone.Zone.spawnStartingMobs(Zone.java:623)
	at me.DDoS.Quarantine.zone.Zone.joinPlayer(Zone.java:510)
	at me.DDoS.Quarantine.command.PlayerCommandExecutor.onCommand(PlayerCommandExecutor.java:66)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
	... 12 more
2012-06-19 13:41:07 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'qrespawnmobs' in plugin Quarantine v0.7
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:479)
	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:821)
	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:781)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:764)
	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:34)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
	at org.bukkit.craftbukkit.CraftWorld.spawnCreature(CraftWorld.java:335)
	at me.DDoS.Quarantine.zone.location.SpawnLocation.spawnCreature(SpawnLocation.java:30)
	at me.DDoS.Quarantine.zone.subzone.SubZone.spawnMob(SubZone.java:81)
	at me.DDoS.Quarantine.zone.subzone.SubZone.spawnStartingMobs(SubZone.java:63)
	at me.DDoS.Quarantine.zone.Zone.reloadMobs(Zone.java:598)
	at me.DDoS.Quarantine.command.AdminCommandExecutor.onCommand(AdminCommandExecutor.java:108)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
	... 12 more
2012-06-19 13:41:26 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'qrespawnmobs' in plugin Quarantine v0.7
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:479)
	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:821)
	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:781)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:764)
	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:34)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
	at org.bukkit.craftbukkit.CraftWorld.spawnCreature(CraftWorld.java:335)
	at me.DDoS.Quarantine.zone.location.SpawnLocation.spawnCreature(SpawnLocation.java:30)
	at me.DDoS.Quarantine.zone.subzone.SubZone.spawnMob(SubZone.java:81)
	at me.DDoS.Quarantine.zone.subzone.SubZone.spawnStartingMobs(SubZone.java:63)
	at me.DDoS.Quarantine.zone.Zone.reloadMobs(Zone.java:598)
	at me.DDoS.Quarantine.command.AdminCommandExecutor.onCommand(AdminCommandExecutor.java:108)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
	... 12 more
2012-06-19 13:43:26 [INFO] cascer1 lost connection: disconnect.quitting
2012-06-19 13:43:26 [INFO] Connection reset
2012-06-19 13:43:26 [INFO] [Quarantine] Stopped mob check task for zone: zone1
2012-06-19 13:43:28 [INFO] [Quarantine] Couldn't update player score in SQL DB. Error: Communications link failure

The last packet successfully received from the server was 542,133 milliseconds ago.  The last packet sent successfully to the server was 44 milliseconds ago.
2012-06-19 13:43:28 [INFO] [Quarantine] Couldn't sort table by score in SQL DB. Error: No operations allowed after connection closed.Connection was implicitly closed by the driver.
2012-06-19 13:44:16 [INFO] GroupManager - INFO -  Data files refreshed.