With no one logged in my server is repetitively crashing. I've tried overwriting the world from a backup a few days old but the issue persists.

I've put the relevant crash reports on my server for viewing here (opens in browser, not download) as well as the last fml-server-latest.log (old ones are deleted just before startup)

Mod listing and versions

I would try to give more information but I'm not sure what the issue is.

It looks like something went wrong with the buffer refreshes for some of the tiles, and all of them seem to be valid indexes.

(Index 2, size 6 is valid, right? Or am I really confused?)

Although after a bit of looking, it looks like world.getTileEntity is crashing, so I think KCauldron is to blame here (try updating it?)

@AlexIIL index 2 size 6 is valid yes

KCauldron updated to 1.7.10-1614.201 and has yet to crash. Wasn't updating because I had seen some strange behaviors before, but so far everything looks as though it's fine (after a bit of fixing in-game.)