The first step is to change the mk_log_level in the web/config/hanlon_server.conf.
mk_log_level: Logger::DEBUG
The quickest way to restart hanlon is through pumactl. Lets get PID first.
# ps -ef | grep puma
root 31 1 0 Feb24 ? 00:00:56 puma 2.15.3 (tcp://0.0.0.0:8026) [web]