kcinnaJlol

Hi @MaSch
An OpenComputers program should never be able to crash your server.
Lets do a quick breakdown.
Here's your stacktrace:
Description: Exception in server tick loop java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(Unknown Source) at java.util.HashMap$KeyIterator.next(Unknown Source) at java.util.AbstractCollection.toArray(Unknown Source) at com.google.common.collect.ImmutableSet.copyOf(ImmutableSet.java:374) at elec332.core.grid.internal.GridEventInputHandler.tickEnd(GridEventInputHandler.java:91) at elec332.core.grid.internal.GridEventHandler.serverTick(GridEventHandler.java:49) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_304_GridEventHandler_serverTick_ServerTickEvent.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185) at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:261) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:657) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) at java.lang.Thread.run(Unknown Source) You can see there're two lines that don't look like they're not vanilla minecraft or forge related:
at elec332.core.grid.internal.GridEventInputHandler.tickEnd(GridEventInputHandler.java:91) at elec332.core.grid.internal.GridEventHandler.serverTick(GridEventHandler.java:49) A quick google reveals that the mod those methods belong to is (suprise suprise) eleccore.
I suggest you go to the github issue tracker and report your findings because this looks pretty much like the exact same thing that's happening to you.
 
Next up... what is eleccore used for and can we temporarily remove it? Well it looks like eleccore is used by Deep Resonance and that mod has worldgen. So removing it is a no-no. Duh....
So...what can we do?
Since we know that Deep Resonance is using eleccore, you can try to remove all your Deep Resonance machines and see if you're still able to reproduce the isse. Is it gone? Well... this means that you're no longer able to use DeepResonance without crashing your server... but at least you're no longer crashing the server so that's a start. Additionally go and look for the Deep Resonance issue tracker as well and tell them that using that there're some serious issues with the library they're using.
 
I hope this somehow helps you. Unfortunately there's nothing more I can do. Those are the joys of modded Minecraft
 
-XyFreak

No spoiler in the title. Just watch the video.
EDIT: Apparently someone's ComputerCraft fork is more findable on Google than the original OpenComputers repository, so here's the official source code: https://github.com/asiekierka/lunatic86
 
 

What's Netcoin? NetCoin is a cryptocurrency designed for OpenComputers, a Minecraft mod that adds computers in the game. It follows Bitcoin's original philosophy: a completely decentralized network of nodes, each one maintaining a ledger with everyone's transactions, grouped into blocks that miners need to create solving the proof-of-work (PoW). What's the crypto behind it? It uses Elliptic Curve Digital Signature Algorithm (ECDSA) to sign transactions and SHA-256 as a PoW. Cryptographic functions are not implemented by software, but OpenComputers provides a component (Data Card) that provides an API to run these functions. That makes cryptography extremely efficient, since it runs directly on Java Code and not by the Lua VM. Protocol details? Block time? Transaction fees? Block time is about 5 minutes; this is a trade-off between transaction speed (who wants to wait 30 minutes for that NTC payment to be confirmed in order to receive those 3 diamonds?) and space (computers have a limited disk space, so blockchain shouldn't grow too fast). NetCoin is a deflationary currency, meaning that block rewards are cut in half every 5000 blocks. There will be a point where miner's only incentive will be transaction fees. This feature hasn't been implemented yet, but it is planned on the future. I want to run this crypto! Great! Use wget or pastebin command from OpenOS with an Internet Card to download the code into one of your computers. Once you have it, you can transfer it in-game via floppy disks to as many computers as wou want. You will need: - A Data Card for using cryptography - 3-4 raids full of Tier 3 Hard Drives (4MB) to store the blockchain - Minimum 4MB of RAM Run a node. It will automatically set up a wallet for you generating a public/private keypair. You will want to share your pubkey stored in wallet.pk, this is your official NetCoin address in which you will receive money. NEVER SHARE YOUR SECRET KEY STORED IN WALLET.SK! You will need to provide at least one node IP address (modem address) for it to connect to the network. It will automatically synchronize with the rest of the network: blocks, other nodes known... To be a miner, you need a node and enable "isMiner" variable. Then you need a mining controller computer connected to the node. Finally, you will connect all your mining computers to the controller, and use "mine" command on the node. You're mining now! Notes
The full code can be found on https://github.com/Juanan7676/netcoin. This is a work in progress project, bugs and security issues are very common, use with caution!