My server has not responded

https://www.dropbox.com/s/v8pra57ab81bfu4/latest.log?dl=1

my server shut down suddenly, It worked without problems for a month. Can you see the log and give some help? Can’t find reason

This log didn’t give us lot of information, sorry.

My guess … This is rare case call “Dead lock”…
How old is your map? did you generate new map on 1.16.1?
If you’re playing old map (Generate before 1.16.1) don’t forget to upgrade chunk first

Is your server crash again after restart? if yes, please let me know

the map generated in 1.15.2

and my servercrashed again after restart

Start server again with “–forceUpgrade” flag

java -jar paper-xxx.jar --forceUpgrade