Close low level rugged repository in project cache worker

app/models/project.rb

@@ -511,10 +511,13 @@ class Project < ActiveRecord::Base
     @repository ||= Repository.new(full_path, self, disk_path: disk_path)
   end
 
-  def reload_repository!
+  def cleanup
+    @repository&.cleanup
     @repository = nil
   end
 
+  alias_method :reload_repository!, :cleanup
+
   def container_registry_url
     if Gitlab.config.registry.enabled
       "#{Gitlab.config.registry.host_port}/#{full_path.downcase}"

app/models/repository.rb

@@ -93,6 +93,10 @@ class Repository
 
   alias_method :raw, :raw_repository
 
+  def cleanup
+    @raw_repository&.cleanup
+  end
+
   # Return absolute path to repository
   def path_to_repo
     @path_to_repo ||= File.expand_path(

app/workers/project_cache_worker.rb

@@ -18,6 +18,8 @@ class ProjectCacheWorker
     update_statistics(project, statistics.map(&:to_sym))
 
     project.repository.refresh_method_caches(files.map(&:to_sym))
+
+    project.cleanup
   end
 
   def update_statistics(project, statistics = [])

changelogs/unreleased/42730-close-rugged-repository.yml

+---
+title: Close low level rugged repository in project cache worker
+merge_request: 16930
+author: Bastian Blank
+type: fixed

lib/gitlab/git/repository.rb

@@ -128,6 +128,10 @@ module Gitlab
         raise NoRepository.new('no repository for such path')
       end
 
+      def cleanup
+        @rugged&.close
+      end
+
       def circuit_breaker
         @circuit_breaker ||= Gitlab::Git::Storage::CircuitBreaker.for_storage(storage)
       end