Retry mailer jobs on common networking errors

ref: https://app.fizzy.do/5986089/cards/3300

Author: flavorjones

app/jobs/notification/bundle/deliver_job.rb

@@ -1,6 +1,8 @@
 class Notification::Bundle::DeliverJob < ApplicationJob
   queue_as :backend
 
+  retry_on Net::OpenTimeout, Net::ReadTimeout, Socket::ResolutionError, wait: :polynomially_longer
+
   def perform(bundle)
     bundle.deliver
   end

lib/rails_ext/action_mailer_mail_delivery_job.rb

@@ -0,0 +1,12 @@
+module ActionMailerMailDeliveryJobExtension
+  extend ActiveSupport::Concern
+
+  included do
+    # ref: https://app.fizzy.do/5986089/cards/3300
+    retry_on Net::OpenTimeout, Net::ReadTimeout, Socket::ResolutionError, wait: :polynomially_longer
+  end
+end
+
+ActiveSupport.on_load :action_mailer do
+  ActionMailer::MailDeliveryJob.include ActionMailerMailDeliveryJobExtension
+end