show in the retry page any other information added to the job by middlewares

lib/sidekiq/web.rb

@@ -107,6 +107,19 @@ module Sidekiq
         args.map { |arg| a = arg.inspect; a.size > count ? "#{a[0..count]}..." : a }.join(", ")
       end
 
+      def display_extra_items(retry_job)
+        regular_keys = [
+          "queue", "class", "args", "retry_count", "retried_at", "failed_at",
+          "retry", "jid", "error_message", "error_class", "backtrace", "error_backtrace"
+        ]
+
+        {}.tap do |extra|
+          retry_job.item.each do |key, value|
+            extra[key] = value unless regular_keys.include?(key)
+          end
+        end
+      end
+
       def tabs
         @tabs ||= {
           "Dashboard" => '',

web/views/retry.slim

@@ -19,6 +19,10 @@ table class="retry table table-bordered table-striped"
       th JID
       td
         code= @retry.jid
+    tr
+      th Extras
+      td
+        code= display_args(display_extra_items(@retry), 1000)
     - if @retry['retry_count'] > 0
       tr
         th = t('RetryCount')