Merge branch 'sidekiq_set_retries' into 'master'

Disable retries for remote mirror update worker

By default, Sidekiq will retry 25 times with an exponential backoff.
This may result in jobs retrying for up to 21 days. That could lead
to an ever-increasing queue size for the remote mirror updates. The
mirrors will attempt to update again within an interval, which should
be sufficient.

See merge request !848

app/workers/repository_update_mirror_worker.rb

@@ -4,7 +4,8 @@ class RepositoryUpdateMirrorWorker
   include Sidekiq::Worker
   include Gitlab::ShellAdapter
-  sidekiq_options queue: :gitlab_shell
+  # Retry not neccessary. It will try again at the next update interval.
+  sidekiq_options queue: :gitlab_shell, retry: false
   attr_accessor :project, :repository, :current_user

changelogs/unreleased-ee/sidekiq_set_retries.yml

+---
+title: Disable retries for remote mirror update worker
+merge_request: 848
+author: