I'm not sure if this is an issue with BukkitForge, or with TickThreading (Which I recently added to the server) - But the error trace seems to mention BukkitForge so I'm posting it here in the hope that you'll be able to help.
In some specific chunks, at some specific heights, players are kicked with this error when they try to place blocks (However they can destroy blocks):
https://gist.github.com/AlexRichman/5282331
Note that they can place blocks in some areas of the chunk. For example there are 4 chunks where placing bellow y=50 will kick you, but above y=50 is fine.
Apart from TickThreading, the server is using all of the mods in the FTB Ultimate modpack.
I'm not sure if this is an issue with BukkitForge, or with TickThreading (Which I recently added to the server) - But the error trace seems to mention BukkitForge so I'm posting it here in the hope that you'll be able to help.
In some specific chunks, at some specific heights, players are kicked with this error when they try to place blocks (However they can destroy blocks): https://gist.github.com/AlexRichman/5282331
Note that they can place blocks in some areas of the chunk. For example there are 4 chunks where placing bellow y=50 will kick you, but above y=50 is fine.
Apart from TickThreading, the server is using all of the mods in the FTB Ultimate modpack.
Thanks for your help,