Я использую рельсы 5 с actioncable на Heroku и у меня есть эта ошибка только в производствеRails 5 в производстве с Heroku
WebSocket connection to 'wss://adham-chatty.heroku.com/cable' failed: WebSocket opening handshake was canceled
я думаю, что из-за пумы
2016-01-21T23:33:56.372977+00:00 heroku[web.1]: Starting process with command `bundle exec puma -t 5:5 -p ${PORT:-3000} -e ${RACK_ENV:-development}`
2016-01-21T23:33:57.651242+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2016-01-21T23:33:58.721808+00:00 app[web.1]: [3] - Gracefully shutting down workers...
2016-01-21T23:33:58.873303+00:00 app[web.1]: [3] === puma shutdown: 2016-01-21 23:33:58 +0000 ===
2016-01-21T23:33:58.873305+00:00 app[web.1]: [3] - Goodbye!
2016-01-21T23:33:58.910391+00:00 app[web.1]: [3] Puma starting in cluster mode...
2016-01-21T23:33:58.910405+00:00 app[web.1]: [3] * Version 2.15.3 (ruby 2.2.3-p173), codename: Autumn Arbor Airbrush
2016-01-21T23:33:58.910407+00:00 app[web.1]: [3] * Min threads: 5, max threads: 5
2016-01-21T23:33:58.910409+00:00 app[web.1]: [3] * Environment: production
2016-01-21T23:33:58.910429+00:00 app[web.1]: [3] * Process workers: 2
2016-01-21T23:33:58.910453+00:00 app[web.1]: [3] * Preloading application
2016-01-21T23:33:59.632680+00:00 heroku[web.1]: Process exited with status 0
Можете ли вы показать нам свой конфигурационный файл puma? – Mario