?

2012-02-10 18:09:13 [INFO] Read timed out
at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:524)
at net.minecraft.server.World.doTick(World.java:1726)
at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:91)
at net.minecraft.server.World.a(World.java:2424)
java.lang.NullPointerException
2012-02-10 18:08:07 [SEVERE] Unexpected exception
2012-02-10 18:08:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
2012-02-10 18:08:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
2012-02-10 18:08:07 [SEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:524)
2012-02-10 18:08:07 [SEVERE] at net.minecraft.server.World.doTick(World.java:1726)
2012-02-10 18:08:07 [SEVERE] at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:91)
2012-02-10 18:08:07 [SEVERE] at net.minecraft.server.World.a(World.java:2424)
2012-02-10 18:08:07 [SEVERE] java.lang.NullPointerException