Game crashes when loading world
Here is log: https://paste.ee/p/9hUTs
Also the game has foamfix and optifine if it matters
forge: 2282
and atg version 2.0,1 for mc 1.11.2

Somebody is asking the world to generate chunks on another thread... probably optifine's mutli-thread loading stuff. Could you test without that to confirm?

Looks like I'll have to switch to concurrent caching after all.

I am also having a similar crash on the 1.10 Coop Life server.
https://gist.github.com/Gyvavaizdis/8f5fa9bae3fde1516630ac790a998430
I am not using Optifine. (was reading prior messages on here)

ChunkCache is used instead of World for things that need to access chunks for render information, and it is used on a render thread, not the main thread. Since modders can call ChunkCache.getBiome from the rendering thread, your implementation probably needs to be concurrent.

Fixed as of 2.1.3, as far as I can tell.