2012-09-02 16:47:37 [SEVERE] java.lang.NullPointerException
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.World.a(World.java:2491)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:90)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.WorldServer.doTick(WorldServer.java:158)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:559)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:475)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
2012-09-02 16:47:37 [SEVERE] 	at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
2012-09-02 16:47:37 [SEVERE] Encountered an unexpected exception NullPointerException
java.lang.NullPointerException
	at net.minecraft.server.World.a(World.java:2491)
	at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:90)
	at net.minecraft.server.WorldServer.doTick(WorldServer.java:158)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:559)
	at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
	at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:475)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
2012-09-02 16:47:37 [WARNING] Could not properly handle event CHUNK_LOAD:
java.lang.IllegalAccessError: Synchronized code got accessed from another thread: java.util.concurrent.ThreadPoolExecutor$Worker
	at org.bukkit.event.Listener.onChunkLoad(Listener:0)
	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:112)
	at net.timedminecraft.server.TimedChunkProviderServer.getChunkAt(TimedChunkProviderServer.java:183)
	at net.minecraft.server.ServerConfigurationManagerAbstract.moveToWorld(ServerConfigurationManagerAbstract.java:374)
	at org.bukkit.craftbukkit.entity.CraftPlayer.teleport(CraftPlayer.java:378)
	at org.bukkit.craftbukkit.entity.CraftEntity.teleport(CraftEntity.java:162)
	at eu.wServers.CWarp.CWarp$1.run(CWarp.java:43)
	at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:52)
	at org.bukkit.craftbukkit.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
2012-09-02 16:47:37 [INFO] This error is logged only once: it could have occurred multiple times by now.
2012-09-02 16:47:37 [INFO] Please contact one of the authors of plugin 'CWarp': Wundark
2012-09-02 16:47:37 [WARNING] Could not properly handle event PLAYER_CHANGED_WORLD:
java.lang.IllegalAccessError: Synchronized code got accessed from another thread: java.util.concurrent.ThreadPoolExecutor$Worker
	at org.bukkit.event.Listener.onPlayerChangedWorld(Listener:0)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at net.minecraft.server.ServerConfigurationManagerAbstract.moveToWorld(ServerConfigurationManagerAbstract.java:412)
	at org.bukkit.craftbukkit.entity.CraftPlayer.teleport(CraftPlayer.java:378)
	at org.bukkit.craftbukkit.entity.CraftEntity.teleport(CraftEntity.java:162)
	at eu.wServers.CWarp.CWarp$1.run(CWarp.java:43)
	at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:52)
	at org.bukkit.craftbukkit.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
2012-09-02 16:47:37 [INFO] This error is logged only once: it could have occurred multiple times by now.
2012-09-02 16:47:37 [INFO] Please contact one of the authors of plugin 'CWarp': Wundark