ERROR: worker mode not supported on JRuby or Windows

[MartinStyk]

To resolve this issue comment line workers Integer(ENV['WEB_CONCURRENCY'] || 2) in file puma.rb

[Ryanrj]

@MartinStyk , just had this error, commented out that line from my puma.rb file. thanks!

[hshoja]

To resolve this issue comment line workers Integer(ENV['WEB_CONCURRENCY'] || 2) in file puma.rb

Thanks Martin, I changed that and it works now , Doesn't it make any issue for Linux base os ?

[Deepakmukka1]

If you are on the latest version of rails

workers ENV.fetch('WEB_CONCURRENCY') { 2 } comment this in puma.rb

[smilephoenix103]

comment
workers ENV.fetch('WEB_CONCURRENCY', 2)
in puma.rb