Let mutex be initialized only once

1ac96603 · Pawel Chojnacki · 05373c24 · 1ac96603
Commit 1ac96603 authored Jan 22, 2018 by Pawel Chojnacki
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lib/gitlab/metrics/concern.rb lib/gitlab/metrics/concern.rb +1 -1

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--- a/lib/gitlab/metrics/concern.rb
+++ b/lib/gitlab/metrics/concern.rb
@@ -6,7 +6,7 @@ module Gitlab
      extend ActiveSupport::Concern
      included do
-        @@_metric_provider_mutex = Mutex.new
+        @@_metric_provider_mutex ||= Mutex.new
        @_metrics_provider_cache = {}
      end