RestClient::ServiceUnavailable: 503 Service Unavailable

[toyokappa]

View details in Rollbar: https://rollbar.com/toyokappa/bestcode/items/6/

RestClient::ServiceUnavailable: 503 Service Unavailable
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/abstract_response.rb", line 223, in exception_with_response
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/abstract_response.rb", line 103, in return!
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb", line 809, in process_result
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb", line 725, in block in transmit
  File "/usr/local/lib/ruby/2.5.0/net/http.rb", line 910, in start
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb", line 715, in transmit
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb", line 145, in execute
  File "/usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb", line 52, in execute
  File "/usr/local/bundle/gems/mailgun_rails-0.9.0/lib/mailgun_rails/client.rb", line 15, in send_message
  File "/usr/local/bundle/gems/mailgun_rails-0.9.0/lib/mailgun_rails/deliverer.rb", line 24, in deliver!
  File "/usr/local/bundle/gems/mail-2.7.0/lib/mail/message.rb", line 2160, in do_delivery
  File "/usr/local/bundle/gems/mail-2.7.0/lib/mail/message.rb", line 260, in block in deliver
  File "/usr/local/bundle/gems/actionmailer-5.2.0/lib/action_mailer/base.rb", line 560, in block in deliver_mail
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/notifications.rb", line 168, in block in instrument
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/notifications/instrumenter.rb", line 23, in instrument
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/notifications.rb", line 168, in instrument
  File "/usr/local/bundle/gems/actionmailer-5.2.0/lib/action_mailer/base.rb", line 558, in deliver_mail
  File "/usr/local/bundle/gems/mail-2.7.0/lib/mail/message.rb", line 260, in deliver
  File "/usr/local/bundle/gems/actionmailer-5.2.0/lib/action_mailer/message_delivery.rb", line 114, in block in deliver_now
  File "/usr/local/bundle/gems/actionmailer-5.2.0/lib/action_mailer/rescuable.rb", line 17, in handle_exceptions
  File "/usr/local/bundle/gems/actionmailer-5.2.0/lib/action_mailer/message_delivery.rb", line 113, in deliver_now
  File "/usr/local/bundle/gems/actionmailer-5.2.0/lib/action_mailer/delivery_job.rb", line 16, in perform
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/execution.rb", line 39, in block in perform_now
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 109, in block in run_callbacks
  File "/usr/local/bundle/gems/i18n-1.0.1/lib/i18n.rb", line 284, in with_locale
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/translation.rb", line 9, in block (2 levels) in <module:Translation>
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 118, in instance_exec
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 118, in block in run_callbacks
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/logging.rb", line 26, in block (4 levels) in <module:Logging>
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/notifications.rb", line 168, in block in instrument
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/notifications/instrumenter.rb", line 23, in instrument
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/notifications.rb", line 168, in instrument
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/logging.rb", line 25, in block (3 levels) in <module:Logging>
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/logging.rb", line 46, in block in tag_logger
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/tagged_logging.rb", line 71, in block in tagged
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/tagged_logging.rb", line 28, in tagged
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/tagged_logging.rb", line 71, in tagged
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/logging.rb", line 46, in tag_logger
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/logging.rb", line 22, in block (2 levels) in <module:Logging>
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 118, in instance_exec
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 118, in block in run_callbacks
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 136, in run_callbacks
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/execution.rb", line 35, in perform_now
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/execution.rb", line 24, in block in execute
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 109, in block in run_callbacks
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/railtie.rb", line 28, in block (4 levels) in <class:Railtie>
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/execution_wrapper.rb", line 87, in wrap
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/reloader.rb", line 73, in block in wrap
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/execution_wrapper.rb", line 83, in wrap
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/reloader.rb", line 72, in wrap
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/railtie.rb", line 27, in block (3 levels) in <class:Railtie>
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 118, in instance_exec
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 118, in block in run_callbacks
  File "/usr/local/bundle/gems/activesupport-5.2.0/lib/active_support/callbacks.rb", line 136, in run_callbacks
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/execution.rb", line 22, in execute
  File "/usr/local/bundle/gems/activejob-5.2.0/lib/active_job/queue_adapters/sidekiq_adapter.rb", line 42, in perform
  File "/usr/local/bundle/gems/sidekiq-5.1.3/lib/sidekiq/processor.rb", line 187, in execute_job
  File "/usr/local/bundle/gems/sidekiq-5.1.3/lib/sidekiq/processor.rb", line 169, in block (2 levels) in process
  File "/usr/local/bundle/gems/sidekiq-5.1.3/lib/sidekiq/middleware/chain.rb", line 128, in block in invoke
  File "/usr/local/bundle/gems/rollbar-2.16.4/lib/rollbar/plugins/sidekiq/plugin.rb", line 11, in call
  File "/usr/local/bundle/gems/sidekiq-5.1.3/lib/sidekiq/middleware/chain.rb", line 130, in block in invoke
  File "/usr/local/bundle/gems/sidekiq-5.1.3/lib/sidekiq/middleware/chain.rb", line 133, in invoke
  File