Bail-out quickly from a timeout error

Gemfile.lock

 PATH
   remote: .
   specs:
-    gitlab-monitor (0.0.20)
+    gitlab-monitor (0.0.21)
       pg (~> 0.18.4)
       quantile (~> 0.2.0)
       redis-namespace (~> 1.5.2)

lib/gitlab_monitor/sidekiq.rb

@@ -15,7 +15,7 @@ module GitLab
         @metrics = metrics
         Sidekiq.configure_client do |config|
-          config.redis = { url: opts[:redis_url], namespace: "resque:gitlab" }
+          config.redis = { url: opts[:redis_url], namespace: "resque:gitlab", connect_timeout: 1 }
         end
         ensure_queue_job_stats_script_loaded
@@ -103,7 +103,7 @@ module GitLab
                          end
                          true
                        end
-      rescue Redis::CannotConnectError # rubocop:disable Lint/HandleExceptions
+      rescue Redis::CannotConnectError, Redis::TimeoutError # rubocop:disable Lint/HandleExceptions
         # Maybe we're trying connecting to a slave
       end

lib/gitlab_monitor/version.rb

 module GitLab
   module Monitor
-    VERSION = "0.0.20".freeze
+    VERSION = "0.0.21".freeze
   end
 end