The server crashes reproducably without any significant error message - see the logs.

what would be the appropriate following step.

I tried to find any meaningful action or error pointing to the source of the problem but nothing so far. Ok it seems to happen close to a wich farm or a specific chunk.

Do you have any suggestion?

Thanks for the help!

Log -the log is in inverted order so to is most recent bottom is oldest. It is after the server booted and the first player logs in.