Problem Random Error Message (need help troubleshooting)

[Choles2rol]

Hey there,

I'm getting the following recurring message and trying to isolate maybe what's causing it.

[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: java.util.ConcurrentModificationException
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at java.util.HashMap$ValueIterator.next(HashMap.java:950)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:367)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:197)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:256)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.gen.ChunkProviderServer.func_73156_b(ChunkProviderServer.java:343)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:165)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:625)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
[12:41:49] [Server thread/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)


Any ideas on how I can narrow this down? I've done some cursory googlage but haven't pinpointed it.

 

[mc.crab]

It's usually best to post the whole log, but based on the error I'm going to assume that you are trying to run a MC 1.6.4 modpack with Java 8. If that's the case, put this in your mods folder: http://files.minecraftforge.net/LegacyJavaFixer/legacyjavafixer-1.0.jar

 

[Choles2rol]

Hey there,

Thanks for getting back to me. I'm running Infinity Evolved with Java 1.7.0_91

We've had a few crashes in the past as well (I think from this) involving memory leaks as well. Here is the log for that which should hopefully shed more light on what is happening.

Any help is vastly appreciated.

 

[Choles2rol]

So the above crash was resolved by removing a mining age that I made in mystcraft. As for my recurring message - it's still happening but now I have more info after looking at the FML logs. So it seems like forge is related to the issue as it occurs when a world save happens. I'll keep troubleshooting - it seems somewhat benign but it is annoying nonetheless.

[17:16:03] [Server thread/DEBUG] [FML/]: Gathering id map for writing to world save world
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: java.util.ConcurrentModificationException
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at java.util.HashMap$ValueIterator.next(HashMap.java:950)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:367)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:197)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:256)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.gen.ChunkProviderServer.func_73156_b(ChunkProviderServer.java:343)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:165)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:625)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
[17:16:03] [Server thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStreamrintln:748]: at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

 

[mc.crab]

Full log?

 

[Choles2rol]

Here you go, it's too big for pastebin so had to zip it up - this is my latest FML log.

Thanks,

 

[mc.crab]

Try installing the mod I linked in the second post, it might fix it.

 

[Choles2rol]

Installed it - no difference - I have 2 servers so I'll set up some tests and see if I can figure it out.

Thanks,

 

[Choles2rol]

In case other people encounter this...

I've narrowed it down to something involving logistic pipes or thermal expansion.

Disabling one or the other stops the error from recurring. Gonna start breaking blocks and figure out the issue.

 

[Choles2rol]

Issue was caused by a player right clicking an LP system with an opaque LP upgrade - it got sucked into the system - upon breaking the LP issue resolved.