Dedging the log, I saw sequences like this:
Jun 23 19:34:29.946265 afpd[10829] {logger.c:405} (D5:Logger): Setup file logging: type: Default, level: LOG_MAXDEBUG, file: /var/log/afpd.log
Jun 23 19:34:35.952955 afpd[10829] {afp_config.c:302} (I:AFPDaemon): pi:AFPServer@* started on 65280.81:129...