"cannot load such file -- rack/handler/puma" unless launching Puma directly about puma

[ezkl]

@TrevorBramble Try giving bundle exec rails s puma and bundle exec rackup -s puma a go. I just ran into a similar issue myself.

[ezkl]

Out of curiosity, do you have puma listed in your Gemfile?

[TrevorBramble]

@ezkl I do indeed. Just gem 'puma', no version.

[TrevorBramble]

@ezkl Yup. Those work. Thanks!

Strange, same versions of rack and puma are available outside of the bundle.

Not sure if this requires updated docs or any other code change, so leaving the issue open for a maintainer to review.

[evanphx]

Bundler currently neuters rubygems so the version outside the bundle won't be found. Because you're executing rackup and not rails s, you have to run it under bundle exec manually.

All that being said, it's odd that rails s puma didn't work. Maybe rails s isn't loading the Gemfile before looking for the server...

I'll ask the rails team. None the less, this isn't a puma bug we've figured out.

[linuxbender]

FYI: same issue same error msg..but if you run only puma (without: rails s puma) in the rails project dir - it works fine - and the rails project runs without any problem - in my case.