http://pastebin.com/be5Ddv09

Using Malisis Doors 1.4.2
Forge 10.13.2.1263

Happened pretty much randomly on the server. I saw an 1.4.3 update of Malisis with changelog: Fixed crash on dedi servers, but when looking in the commit 9a6df1f so I am not sure if its the same. :)

That shouldn't be possible. Could you provide full log to see if maybe there is something else messing with the registry ?

Here it is: https://www.dropbox.com/s/to1taq97xtkneze/fml-server-3.log?dl=0

I am going through all issues reported for my modpack, so just would like to ask. Any progress or idea what can be causing this crash @Ordinastie?

Players are saying it is no longer happening. Gonna close it.