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ruby-on-railsherokuresque

Heroku not starting workers

My Heroku app is not starting any workers. I scale the worker first:

heroku ps:scale resque=1 -a test-eagle
Scaling dynos... done, now running resque at 1:Free

Then when I check the workers, I see:

heroku ps:workers -a test-eagle
<app> is running 0 workers

What could be worng here? This is how my Procfile looks:

web: bundle exec puma -C config/puma.rb
resque: env TERM_CHILD=1 bundle exec rake resque:work QUEUE=* COUNT=1

Or is it because it is a free app which can only handle 1 web worker and no other dynos?

Edit:

When I check with heroku ps -a <appname> I see that just after starting the worker is crashed: worker.1: crashed. This is without doing anything in the application itself.

Solution

  • UPDATE: Well, I have a "free" app running that happens to run Puma, too. So, I updated Procfile as follows:

    web: bundle exec puma -C config/puma.rb
resque: env TERM_CHILD=1 bundle exec rake resque:work QUEUE=* COUNT=1

    After that, I pushed the app to Heroku and ran heroku ps:scale, as you specified. It worked as follows:

    D:\Bitnami\rubystack-2.2.5-3\projects\kctapp>heroku ps -a kctapp
=== web (Free): bundle exec puma -C config/puma.rb (1)
web.1: up 2016/06/06 19:38:24 -0400 (~ 1s ago)


D:\Bitnami\rubystack-2.2.5-3\projects\kctapp>heroku ps:scale resque=1 -a kctapp
Scaling dynos... done, now running resque at 1:Free

D:\Bitnami\rubystack-2.2.5-3\projects\kctapp>heroku ps -a kctapp
=== web (Free): bundle exec puma -C config/puma.rb (1)
web.1: up 2016/06/06 19:38:24 -0400 (~ 51s ago)

=== resque (Free): env TERM_CHILD=1 bundle exec rake resque:work QUEUE=* COUNT=1 (1)
resque.1: crashed 2016/06/06 19:39:18 -0400 (~ -3s ago)

    Note that it did crash. But, I don't have any code running there, so that could be why? Also, note that I use the "heroku ps" command as "heroku ps:workers" for me throws an error saying it is deprecated.

    This is my config/puma.rb, if that helps:

    workers Integer(ENV['WEB_CONCURRENCY'] || 4)
threads_count = Integer(ENV['MAX_THREADS'] || 8)
threads threads_count, threads_count

preload_app!

rackup      DefaultRackup
port        ENV['PORT']     || 5000
environment ENV['RACK_ENV'] || 'development'

    With edit: I missed the scale command...

    See scaling in Heroku here. The options that I see are web, worker, rake or console, not resque. I tried your command and it didn't recognize "that formation". I'm curious about it.

    Checking a free app, it does not give you the option to add a worker dyno. Checking a hobby app, you can add workers to it. With professional apps, you can mix and match the dyno type between web and worker using 1X, 2X, and Performance dynos.