So I'm running a 1.7.10 Minecraft server, with a bunch of mods and Forge 10.13.3.1408 installed.

 

The server appears to be running pretty well, except I'm getting this error repeatedly spammed in my server console:

 

[19:46:09] [server thread/ERROR] [FML/]: Index: 4 Listeners:
[19:46:09] [server thread/ERROR] [FML/]: 0: NORMAL
[19:46:09] [server thread/ERROR] [FML/]: 1: ASM: cofh.core.world.WorldHandler@44f463a5 handleChunkSaveEvent(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:46:09] [server thread/ERROR] [FML/]: 2: ASM: erogenousbeef.bigreactors.common.BREventHandler@71b22b58 chunkSave(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:46:09] [server thread/ERROR] [FML/]: 3: ASM: mrtjp.core.world.SimpleGenHandler$@15560cb7 chunkSaveEvent(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:46:09] [server thread/ERROR] [FML/]: 4: ASM: codechicken.lib.world.WorldExtensionManager$WorldExtensionEventHandler@5e43a006 onChunkDataSave(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.NullPointerException
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at codechicken.lib.world.WorldExtension.saveChunkData(WorldExtension.java:62)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at codechicken.lib.world.WorldExtensionManager$WorldExtensionEventHandler.onChunkDataSave(WorldExtensionManager.java:42)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at cpw.mods.fml.common.eventhandler.ASMEventHandler_539_WorldExtensionEventHandler_onChunkDataSave_Save.invoke(.dynamic)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:198)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:256)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:302)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:809)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:318)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:569)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
[19:46:09] [server thread/INFO] [sTDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: 	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
[19:46:09] [server thread/ERROR] [FML/]: Exception caught during firing event net.minecraftforge.event.world.ChunkDataEvent$Save@67eaf94b:
java.lang.NullPointerException
at codechicken.lib.world.WorldExtension.saveChunkData(WorldExtension.java:62) ~[WorldExtension.class:?]
at codechicken.lib.world.WorldExtensionManager$WorldExtensionEventHandler.onChunkDataSave(WorldExtensionManager.java:42) ~[WorldExtensionManager$WorldExtensionEventHandler.class:?]
at cpw.mods.fml.common.eventhandler.ASMEventHandler_539_WorldExtensionEventHandler_onChunkDataSave_Save.invoke(.dynamic) ~[?:?]
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138) [EventBus.class:?]
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:198) [aqk.class:?]
at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:256) [ms.class:?]
at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:302) [ms.class:?]
at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:809) [mt.class:?]
at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:318) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:569) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]

 

Any idea what this means, or how I might start by fixing it? The entire server log can be found here: https://dl.dropboxusercontent.com/u/15335141/Forge%20Server%20Log.txt

I can provide more information if needed. It seems like maybe it's something messed up in the world? Is there any way for me to tell what block is messing things up, so I could perhaps remove it in MCedit?

 

at codechicken.lib.world.WorldExtension.saveChunkData(WorldExtension.java:62) ~[WorldExtension.class:?]

I wonder what mod could be causing it....

It's throwing exceptions from a couple different mods that handle chunks. I wasn't sure which of them could be the root, as couldn't one of the other mods be passing a null object to codechicken?

No clue, its NPEing inside CB's code not ours we cant do anything about it.