With aozan 3.0.2 in legacy mode (aozan.sh $AOZAN_CONF), no logs are generated (even INFO level), either in stderr or log file, with the following configuration parameter:
aozan.log.path=/my/path/aozan.log
I needed to replace this parameter by the two other parameters below, to have INFO logs generated into the log file:
aozan.logger=file
aozan.log=/my/path/aozan.log
and all log levels were written in the file by adding log.level=all as well