Server crash on start up.

Log: http://pastebin.com/Ai6G6X9j

If you need more information, I can try to diagnose and find out if anyone knows what happened. However, I'm pretty cut for information.

Thanks!

I believe this was caused by a drone tree farm I made on the server

It used sorting barrels connected to an input chest. the drone dumped stuff in the chest, then pulled saplings out of the (upgraded with iron structure + storage) sorting barrel.

This system worked fine for quite a while before the crash happened.

the crash indicates that the crash occured when the drone was extracting from the barrel

Hope this helps