Sidekiq: Rails 5beta2 errors on load when I require sidekiq/web

[hmistry]

Hi

In my Rails app, the app gives the following error on load and fails to start when I tried to add the Sidekiq web ui to monitor it. I isolated the line to require 'sidekiq/web' in routes.rb! I couldn't find any hints online for this. Any suggestions on how I can solve this?

Thanks,
Hiren

Using Ruby 2.3.0, Rails 5.0.0.beta2 and Sidekiq 4.1.1.

/Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require': cannot load such file -- rack/showexceptions (LoadError)
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `block in require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in `load_dependency'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/sinatra-1.0/lib/sinatra/showexceptions.rb:1:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `block in require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in `load_dependency'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/sinatra-1.0/lib/sinatra/base.rb:6:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `block in require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in `load_dependency'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/sidekiq-4.1.1/lib/sidekiq/web.rb:3:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `block in require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in `load_dependency'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config/routes.rb:1:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:296:in `load'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:296:in `block in load'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in `load_dependency'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:296:in `load'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:40:in `each'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:40:in `load_paths'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:16:in `reload!'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:26:in `block in updater'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/file_update_checker.rb:75:in `execute'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:27:in `updater'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:30:in `instance_exec'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:30:in `run'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:55:in `block in run_initializers'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `call'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
  from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:54:in `run_initializers'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application.rb:350:in `initialize!'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config/environment.rb:5:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `block in require'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in `load_dependency'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in `require'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config.ru:3:in `block in <main>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:55:in `instance_eval'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:55:in `initialize'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config.ru:in `new'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config.ru:in `<main>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:49:in `eval'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:49:in `new_from_string'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:40:in `parse_file'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/server.rb:318:in `build_app_and_options_from_config'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/server.rb:218:in `app'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/server.rb:58:in `app'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/server.rb:353:in `wrapped_app'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/server.rb:136:in `log_to_stdout'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/server.rb:76:in `start'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:90:in `block in server'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:85:in `tap'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:85:in `server'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/command.rb:20:in `run'
  from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands.rb:19:in `<top (required)>'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/rails:9:in `require'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/rails:9:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client/rails.rb:28:in `load'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client/rails.rb:28:in `call'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client/command.rb:7:in `call'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client.rb:28:in `run'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/bin/spring:49:in `<top (required)>'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/binstub.rb:11:in `load'
  from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/binstub.rb:11:in `<top (required)>'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/spring:13:in `require'
  from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/spring:13:in `<top (required)>'
  from bin/rails:3:in `load'
  from bin/rails:3:in `<main>'

[mperham]

Upgrade to rails 5rc1.

On May 6, 2016, at 19:19, hmistry [email protected] wrote:

Hi

In my Rails app, the app gives the following error on load and fails to start when I tried to add the Sidekiq web ui to monitor it. I isolated the line to require 'sidekiq/web' in routes.rb! I couldn't find any hints online for this. Any suggestions on how I can solve this?

Thanks,
Hiren

Using Ruby 2.3.0, Rails 5.0.0.beta2 and Sidekiq 4.1.1.

/Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in require': cannot load such file -- rack/showexceptions (LoadError) from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inblock in require'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in load_dependency' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inrequire'
from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/sinatra-1.0/lib/sinatra/showexceptions.rb:1:in <top (required)>' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inrequire'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in block in require' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:inload_dependency'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in require' from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/sinatra-1.0/lib/sinatra/base.rb:6:in from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in require' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inblock in require'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in load_dependency' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inrequire'
from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/sidekiq-4.1.1/lib/sidekiq/web.rb:3:in <top (required)>' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inrequire'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in block in require' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:inload_dependency'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in require' from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config/routes.rb:1:in from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:296:in load' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:296:inblock in load'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in load_dependency' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:296:inload'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:40:in block in load_paths' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:40:ineach'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:40:in load_paths' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:16:inreload!'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:26:in block in updater' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/file_update_checker.rb:75:inexecute'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:27:in updater' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/routes_reloader.rb:7:inexecute_if_updated'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application/finisher.rb:69:in block in <module:Finisher>' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:30:ininstance_exec'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:30:in run' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:55:inblock in run_initializers'
from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:in block in tsort_each' from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:inblock (2 levels) in each_strongly_connected_component'
from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:in each_strongly_connected_component_from' from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:inblock in each_strongly_connected_component'
from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in each' from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:incall'
from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in each_strongly_connected_component' from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:intsort_each'
from /Users/hm/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:in tsort_each' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/initializable.rb:54:inrun_initializers'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/application.rb:350:in initialize!' from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config/environment.rb:5:in from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:in require' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inblock in require'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:268:in load_dependency' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/activesupport-5.0.0.beta2/lib/active_support/dependencies.rb:302:inrequire'
from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config.ru:3:in block in <main>' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:55:ininstance_eval'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:55:in initialize' from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config.ru:innew'
from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/config.ru:in <main>' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:49:ineval'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:49:in new_from_string' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/builder.rb:40:inparse_file'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/server.rb:318:in build_app_and_options_from_config' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/server.rb:218:inapp'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/server.rb:58:in app' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/rack-2.0.0.alpha/lib/rack/server.rb:353:inwrapped_app'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/server.rb:136:in log_to_stdout' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/server.rb:76:instart'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:90:in block in server' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:85:intap'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:85:in server' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands/commands_tasks.rb:49:inrun_command!'
from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/command.rb:20:in run' from /Users/hm/.rvm/gems/ruby-2.3.0@global/gems/railties-5.0.0.beta2/lib/rails/commands.rb:19:in from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/rails:9:in require' from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/rails:9:in from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client/rails.rb:28:in load' from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client/rails.rb:28:incall'
from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client/command.rb:7:in call' from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/client.rb:28:inrun'
from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/bin/spring:49:in <top (required)>' from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/binstub.rb:11:inload'
from /Users/hm/.rvm/gems/ruby-2.3.0@loop_server/gems/spring-1.6.3/lib/spring/binstub.rb:11:in <top (required)>' from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/spring:13:inrequire'
from /Users/hm/Documents/Loop/Server/Rails Projects/loop_server/bin/spring:13:in <top (required)>' from bin/rails:3:inload'
from bin/rails:3:in `

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[hmistry]

@mperham Can we reopen this issue? I updated my Rails app to 5rc1 and all my gems to the latest ones bundler resolves to. However it's still failing with the same error.

I also tried creating a fresh new rails project with default settings, edited the Gemfile and added sidekiq and sinatra to it. Ran bundle and then add the require 'sidekiq/web and mount Sidekiq::Web => '/sidekiq' in routes and still same error. This is a clean fresh project with nothing inside. Rails works if I comment those 2 lines out.

I also noticed Sinatra v1.0 is being installed by bundler while the new version is 1.4.7. Is that causing the issue?

[mperham]

This is because you aren't using the proper rack version. You need 2.0.alpha.

On May 10, 2016, at 01:24, hmistry [email protected] wrote:

@mperham Can we reopen this issue? I updated my Rails app to 5rc1 and all my gems to the latest ones bundler resolves to. However it's still failing with the same error.

I also tried creating a fresh new rails project with default settings, edited the Gemfile and added sidekiq and sinatra to it. Ran bundle and then add the require 'sidekiq/web and mount Sidekiq::Web => '/sidekiq' in routes and still same error. This is a clean fresh project with nothing inside. Rails works if I comment those 2 lines out.

I also noticed Sinatra v1.0 is being installed by bundler while the new version is 1.4.7. Is that causing the issue?

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[ujh]

But Sinatra has a dependency on rack ~> 1.5 so until they release a new version that allows usage of rack 2 it's not possible to use the Sidekiq web, isn't it?

[mperham]

You need Sinatra master. They have not released a prerelease gem.

On May 10, 2016, at 06:34, Urban Hafner [email protected] wrote:

But Sinatra has a dependency on rack ~> 1.5 so until they release a new version that allows usage of rack 2 it's not possible to use the Sidekiq web, isn't it?

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[ujh]

I see, thank you! 👍

[hmistry]

@mperham I was using Rack 2.0.0.rc1, which I assume is ok. The correct answer is forcing Sinatra to use master.

Thanks for your help and quick responses!

[chrisnicola]

This is still a problem with the Rails release and Rack 2.0.1 without both sinatra and sinatra/rack-protection installed from master.

  # Required for Sidekiq::Web
  gem 'sinatra', github: 'sinatra', require: false 
  gem 'rack-protection', github: 'sinatra/rack-protection', require: false
  # Required for Sidekiq::Web

Works.