[00:16:48 WARN]: java.util.ConcurrentModificationException
[00:16:48 WARN]: at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
[00:16:48 WARN]: at java.util.HashMap$ValueIterator.next(HashMap.java:950)
[00:16:48 WARN]: at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:388)
[00:16:48 WARN]: at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:218)
[00:16:48 WARN]: at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:338)
[00:16:48 WARN]: at net.minecraft.world.gen.ChunkProviderServer.func_73156_b(ChunkProviderServer.java:483)
[00:16:48 WARN]: at com.bergerkiller.bukkit.common.internal.ChunkProviderServerHook.func_73156_b(ChunkProviderServerHook.java:209)
[00:16:48 WARN]: at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:254)
[00:16:48 WARN]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:920)
[00:16:48 WARN]: at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:423)
[00:16:48 WARN]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:798)
[00:16:48 WARN]: at net.minecraft.server.MinecraftServer.r