Possible Fixes

Yes

Modpack Version

9-0.2.53

What happened?

Every time one of my friends wants to explore the world with the jetpack, he gets a few chunks far and then he has to wait 3-10 minutes until the chunks are loaded. If he is not careful and flies into the unloaded chunk, the server crashes immediately.

The server has a Ryzen 7 3700X and enough RAM, but that can't be the problem as other Minecraft servers also run on it without any problems.

At the beginning of ATM9 I also created a server that ran without any problems.

Crash Log

https://gist.github.com/DenisKoether/2600dd48ae48f38bd6258d71618e8516

Latest.Log

No response

I set "Max tick time=-1" now the server no longer crashes but you are kicked out of the server until the chunks are loaded...

I see you have the same problem as i have...
Here
It is annoying waiting for the world to load every like 5-10 minutes due to this bug.

I use AMP and the fix was to disable "Use Synchronous IO".