I'm using Rails, Puma, Capistrano3. I have installed the gem capistrano3-puma as well. I started Puma with Puma Jungle https://github.com/puma/puma/tree/master/tools/jungle/upstart
How do I restart Puma during deployment?
You can restart manually using the following command
bundle exec pumactl -P /home/deploy/.pids/puma.pid restart
Make sure you point to the correct pid path.