Puma process/server didn't stops after procofile stop (production) or ctrl-c (--dev)

Hi!
Here is a simple sinatra app with puma as a server: https://github.com/vfreefly/simple_app
Procfile from app: web: bundle exec puma -t 5:5 -p ${PORT:-3000} -e ${RACK_ENV:-development}

Environment: ubuntu 16.04
Steps to reproduce:

git clone https://github.com/vfreefly/simple_app.git
cd simple_app

rbenv local 2.5.1
gem install procodile

bundle install
procodile start
procodile stop

After these steps app still works on localhost:3000 and puma process is still alive:

Btw, in case of foreman or heroku local all is fine and app with puma stops correctly. Looks like procofile incorrectly determines puma's real process pid.

[brunow]

Hi,

I had the same issue, have you fix it in any way ?

[antonyr]

I see that child processes are not getting killed.