Verifique que Redis se esté ejecutando
$ redis-cli ping
PONG
Kirk-Patrick Brown
$ redis-cli ping
PONG
$ redis-serverif Rails.env.production?
puts "production: #{ENV['REDIS_URL']}"
uri = URI.parse(ENV["REDIS_URL"])
else
puts "not production"
uri = URI.parse("redis://localhost:6379")
end