Merge branch 'catch-redis-address-error' into 'master'

Catch redis address error

Closes omnibus-gitlab#2545

See merge request !12542

config/initializers/sidekiq.rb

@@ -74,5 +74,5 @@
       end
     end
   end
-rescue Redis::BaseError, SocketError, Errno::ENOENT, Errno::EAFNOSUPPORT, Errno::ECONNRESET, Errno::ECONNREFUSED
+rescue Redis::BaseError, SocketError, Errno::ENOENT, Errno::EADDRNOTAVAIL, Errno::EAFNOSUPPORT, Errno::ECONNRESET, Errno::ECONNREFUSED
 end

lib/gitlab/current_settings.rb

@@ -25,7 +25,7 @@ def ensure_application_settings!
     def cached_application_settings
       begin
         ::ApplicationSetting.cached
-      rescue ::Redis::BaseError, ::Errno::ENOENT
+      rescue ::Redis::BaseError, ::Errno::ENOENT, ::Errno::EADDRNOTAVAIL
         # In case Redis isn't running or the Redis UNIX socket file is not available
       end
     end