Problem Magicworld v7 - Codechicken/Chickenchunks chunk reset issue

[Moonz0r]

In the latest version of Magicworld, placing a chunkloader would cause that chunk to reset/regen.
Also, related, the server would throw a very generic sounding java error every few minutes that did not appear to inhibit the functioning of the server.

I back-reved CodeChickenCore to 0.7.0.2, and chickenchunks to 1.2.1.1, and both issues disappeared.

Chunk reset error looked like-

2013-01-29 02:51:30 [WARNING] Failed to handle packet for *snip*: java.lang.NullPointerException
java.lang.NullPointerException
    at com.google.common.collect.ImmutableSetMultimap$Builder.putAll(ImmutableSetMultimap.java:246)
    at net.minecraftforge.common.ForgeChunkManager.forceChunk(ForgeChunkManager.java:727)
    at codechicken.chunkloader.ChunkLoaderManager$TicketManager.addChunk(ChunkLoaderManager.java:113)
    at codechicken.chunkloader.ChunkLoaderManager$ChunkLoaderOrganiser.forceChunks(ChunkLoaderManager.java:235)
    at codechicken.chunkloader.ChunkLoaderManager$ChunkLoaderOrganiser.addChunkLoader(ChunkLoaderManager.java:184)
    at codechicken.chunkloader.ChunkLoaderManager.addChunkLoader(ChunkLoaderManager.java:637)
    at codechicken.chunkloader.TileChunkLoaderBase.activate(TileChunkLoaderBase.java:123)
    at codechicken.chunkloader.TileChunkLoaderBase.onBlockPlacedBy(TileChunkLoaderBase.java:85)
    at codechicken.chunkloader.BlockChunkLoader.a(BlockChunkLoader.java:101)
    at vq.placeBlockAt(ItemBlock.java:208)
    at vq.a(ItemBlock.java:97)
    at ur.a(SourceFile:88)
    at ir.a(ItemInWorldManager.java:424)
    at iv.a(NetServerHandler.java:578)
    at fk.a(SourceFile:58)
    at cg.b(TcpConnection.java:458)
    at iv.d(NetServerHandler.java:136)
    at iw.b(NetworkListenThread.java:57)
    at ht.b(SourceFile:30)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)
    at ho.r(DedicatedServer.java:269)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
    at fy.run(SourceFile:849)

I don't have a record of the error that was being thrown every few minutes due to the log file being overwritten, but it started with - ConcurrentModificationException

 

[Nessiroj]

Did the chunk also have an enderchest in it?

 

[Moonz0r]

It's possible. Is there a known issue with enderchests + chunkloaders?

 

[NooBxGockeL]

i have a similiar problem, if you solve the problem please post it here!

 

[Nessiroj]

It's possible. Is there a known issue with enderchests + chunkloaders?

Known is a big word, there have been some reports on the boards about this combo (hence why i was asking).
There is currently no fix for it that i know (not sure if the problem still persists in the new modpacks since i see a new version of ChickenCore)