Backports EE mirror stuck handling feature...

Backports EE mirror stuck handling feature (https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2628) to CE

Gemfile

@@ -144,8 +144,6 @@ end
 
 # State machine
 gem 'state_machines-activerecord', '~> 0.4.0'
-# Run events after state machine commits
-gem 'after_commit_queue', '~> 1.3.0'
 
 # Issue tags
 gem 'acts-as-taggable-on', '~> 4.0'

Gemfile.lock

@@ -46,8 +46,6 @@ GEM
       ice_nine (~> 0.11.0)
       memoizable (~> 0.4.0)
     addressable (2.3.8)
-    after_commit_queue (1.3.0)
-      activerecord (>= 3.0)
     akismet (2.0.0)
     allocations (1.0.5)
     arel (6.0.4)
@@ -963,7 +961,6 @@ DEPENDENCIES
   activerecord_sane_schema_dumper (= 0.2)
   acts-as-taggable-on (~> 4.0)
   addressable (~> 2.3.8)
-  after_commit_queue (~> 1.3.0)
   akismet (~> 2.0)
   allocations (~> 1.0)
   asana (~> 0.6.0)

app/models/project.rb

@@ -369,7 +369,10 @@ class Project < ActiveRecord::Base
     state :failed
 
     after_transition [:none, :finished, :failed] => :scheduled do |project, _|
-      project.run_after_commit { add_import_job }
+      project.run_after_commit do
+        job_id = add_import_job
+        update(import_jid: job_id) if job_id
+      end
     end
 
     after_transition started: :finished do |project, _|
@@ -524,17 +527,26 @@ class Project < ActiveRecord::Base
   def add_import_job
     job_id =
       if forked?
-        RepositoryForkWorker.perform_async(id, forked_from_project.repository_storage_path,
+        RepositoryForkWorker.perform_async(id,
+                                           forked_from_project.repository_storage_path,
                                            forked_from_project.full_path,
                                            self.namespace.full_path)
       else
         RepositoryImportWorker.perform_async(self.id)
       end
 
+    log_import_activity(job_id)
+
+    job_id
+  end
+
+  def log_import_activity(job_id, type: :import)
+    job_type = type.to_s.capitalize
+
     if job_id
-      Rails.logger.info "Import job started for #{full_path} with job ID #{job_id}"
+      Rails.logger.info("#{job_type} job scheduled for #{full_path} with job ID #{job_id}.")
     else
-      Rails.logger.error "Import job failed to start for #{full_path}"
+      Rails.logger.error("#{job_type} job failed to create for #{full_path}.")
     end
   end
 
@@ -543,6 +555,7 @@ class Project < ActiveRecord::Base
       ProjectCacheWorker.perform_async(self.id)
     end
 
+    update(import_error: nil)
     remove_import_data
   end
 

app/workers/repository_fork_worker.rb

@@ -5,14 +5,17 @@ class RepositoryForkWorker
   include Gitlab::ShellAdapter
   include DedicatedSidekiqQueue
 
+  sidekiq_options status_expiration: StuckImportJobsWorker::IMPORT_JOBS_EXPIRATION
+
   def perform(project_id, forked_from_repository_storage_path, source_path, target_path)
+    project = Project.find(project_id)
+
+    return unless start_fork(project)
+
     Gitlab::Metrics.add_event(:fork_repository,
                               source_path: source_path,
                               target_path: target_path)
 
-    project = Project.find(project_id)
-    project.import_start
-
     result = gitlab_shell.fork_repository(forked_from_repository_storage_path, source_path,
                                           project.repository_storage_path, target_path)
     raise ForkError, "Unable to fork project #{project_id} for repository #{source_path} -> #{target_path}" unless result
@@ -33,6 +36,13 @@ class RepositoryForkWorker
 
   private
 
+  def start_fork(project)
+    return true if project.import_start
+
+    Rails.logger.info("Project #{project.full_path} was in inconsistent state (#{project.import_status}) while forking.")
+    false
+  end
+
   def fail_fork(project, message)
     Rails.logger.error(message)
     project.mark_import_as_failed(message)

app/workers/repository_import_worker.rb

@@ -4,23 +4,18 @@ class RepositoryImportWorker
   include Sidekiq::Worker
   include DedicatedSidekiqQueue
 
-  sidekiq_options status_expiration: StuckImportJobsWorker::IMPORT_EXPIRATION
-
-  attr_accessor :project, :current_user
+  sidekiq_options status_expiration: StuckImportJobsWorker::IMPORT_JOBS_EXPIRATION
 
   def perform(project_id)
-    @project = Project.find(project_id)
-    @current_user = @project.creator
+    project = Project.find(project_id)
 
-    project.import_start
+    return unless start_import(project)
 
     Gitlab::Metrics.add_event(:import_repository,
-                              import_url: @project.import_url,
-                              path: @project.full_path)
-
-    project.update_columns(import_jid: self.jid, import_error: nil)
+                              import_url: project.import_url,
+                              path: project.full_path)
 
-    result = Projects::ImportService.new(project, current_user).execute
+    result = Projects::ImportService.new(project, project.creator).execute
     raise ImportError, result[:message] if result[:status] == :error
 
     project.repository.after_import
@@ -37,6 +32,13 @@ class RepositoryImportWorker
 
   private
 
+  def start_import(project)
+    return true if project.import_start
+
+    Rails.logger.info("Project #{project.full_path} was in inconsistent state (#{project.import_status}) while importing.")
+    false
+  end
+
   def fail_import(project, message)
     project.mark_import_as_failed(message)
   end

app/workers/stuck_import_jobs_worker.rb

@@ -2,36 +2,60 @@ class StuckImportJobsWorker
   include Sidekiq::Worker
   include CronjobQueue
 
-  IMPORT_EXPIRATION = 15.hours.to_i
+  IMPORT_JOBS_EXPIRATION = 15.hours.to_i
 
   def perform
-    stuck_projects.find_in_batches(batch_size: 500) do |group|
+    projects_without_jid_count = mark_projects_without_jid_as_failed!
+    projects_with_jid_count = mark_projects_with_jid_as_failed!
+
+    Gitlab::Metrics.add_event(:stuck_import_jobs,
+                             projects_without_jid_count: projects_without_jid_count,
+                             projects_with_jid_count: projects_with_jid_count)
+  end
+
+  private
+
+  def mark_projects_without_jid_as_failed!
+    started_projects_without_jid.each do |project|
+      project.mark_import_as_failed(error_message)
+    end.count
+  end
+
+  def mark_projects_with_jid_as_failed!
+    completed_jids_count = 0
+
+    started_projects_with_jid.find_in_batches(batch_size: 500) do |group|
       jids = group.map(&:import_jid)
 
       # Find the jobs that aren't currently running or that exceeded the threshold.
-      completed_jids = Gitlab::SidekiqStatus.completed_jids(jids)
+      completed_jids = Gitlab::SidekiqStatus.completed_jids(jids).to_set
 
       if completed_jids.any?
-        completed_ids = group.select { |project| completed_jids.include?(project.import_jid) }.map(&:id)
-
-        fail_batch!(completed_jids, completed_ids)
+        completed_jids_count += completed_jids.count
+        group.each do |project|
+          project.mark_import_as_failed(error_message) if completed_jids.include?(project.import_jid)
         end
+
+        Rails.logger.info("Marked stuck import jobs as failed. JIDs: #{completed_jids.to_a.join(', ')}")
       end
     end
 
-  private
+    completed_jids_count
+  end
 
-  def stuck_projects
-    Project.select('id, import_jid').with_import_status(:started).where.not(import_jid: nil)
+  def started_projects
+    Project.with_import_status(:started)
   end
 
-  def fail_batch!(completed_jids, completed_ids)
-    Project.where(id: completed_ids).update_all(import_status: 'failed', import_error: error_message)
+  def started_projects_with_jid
+    started_projects.where.not(import_jid: nil)
+  end
 
-    Rails.logger.info("Marked stuck import jobs as failed. JIDs: #{completed_jids.join(', ')}")
+  def started_projects_without_jid
+    started_projects.where(import_jid: nil)
   end
 
   def error_message
-    "Import timed out. Import took longer than #{IMPORT_EXPIRATION} seconds"
+    "Import timed out. Import took longer than #{IMPORT_JOBS_EXPIRATION} seconds"
   end
 end

lib/after_commit_queue.rb

+module AfterCommitQueue
+  extend ActiveSupport::Concern
+
+  included do
+    after_commit :_run_after_commit_queue
+    after_rollback :_clear_after_commit_queue
+  end
+
+  def run_after_commit(method = nil, &block)
+    _after_commit_queue << proc { self.send(method) } if method
+    _after_commit_queue << block if block
+    true
+  end
+
+  protected
+
+  def _run_after_commit_queue
+    while action = _after_commit_queue.pop
+      self.instance_eval(&action)
+    end
+  end
+
+  def _after_commit_queue
+    @after_commit_queue ||= []
+  end
+
+  def _clear_after_commit_queue
+    _after_commit_queue.clear
+  end
+end

lib/gitlab/sidekiq_status.rb

@@ -90,9 +90,14 @@ module Gitlab
     #
     # Returns an array of completed JIDs
     def self.completed_jids(job_ids)
-      Sidekiq.redis do |redis|
-        job_ids.reject { |jid| redis.exists(key_for(jid)) }
+      statuses = job_status(job_ids)
+
+      completed = []
+      job_ids.zip(statuses).each do |job_id, status|
+        completed << job_id unless status
       end
+
+      completed
     end
 
     def self.key_for(jid)

spec/lib/after_commit_queue_spec.rb

+require 'spec_helper'
+
+describe AfterCommitQueue do
+  it 'runs after transaction is committed' do
+    called = false
+    test_proc = proc { called = true }
+
+    project = build(:project)
+    project.run_after_commit(&test_proc)
+
+    project.save
+
+    expect(called).to be true
+  end
+end

spec/models/project_spec.rb

@@ -1610,8 +1610,7 @@ describe Project do
     it 'imports a project' do
       expect_any_instance_of(RepositoryImportWorker).to receive(:perform).and_call_original
 
-      project.import_schedule
-
+      expect { project.import_schedule }.to change { project.import_jid }
       expect(project.reload.import_status).to eq('finished')
     end
   end
@@ -1624,6 +1623,13 @@ describe Project do
         allow(Projects::HousekeepingService).to receive(:new) { housekeeping_service }
       end
 
+      it 'resets project import_error' do
+        error_message = 'Some error'
+        mirror = create(:project_empty_repo, :import_started, import_error: error_message)
+
+        expect { mirror.import_finish }.to change { mirror.import_error }.from(error_message).to(nil)
+      end
+
       it 'performs housekeeping when an import of a fresh project is completed' do
         project = create(:project_empty_repo, :import_started, import_type: :github)
 
@@ -1730,17 +1736,21 @@ describe Project do
   end
 
   describe '#add_import_job' do
+    let(:import_jid) { '123' }
+
     context 'forked' do
       let(:forked_project_link) { create(:forked_project_link, :forked_to_empty_project) }
       let(:forked_from_project) { forked_project_link.forked_from_project }
       let(:project) { forked_project_link.forked_to_project }
 
       it 'schedules a RepositoryForkWorker job' do
-        expect(RepositoryForkWorker).to receive(:perform_async)
-          .with(project.id, forked_from_project.repository_storage_path,
-              forked_from_project.disk_path, project.namespace.full_path)
+        expect(RepositoryForkWorker).to receive(:perform_async).with(
+          project.id,
+          forked_from_project.repository_storage_path,
+          forked_from_project.disk_path,
+          project.namespace.full_path).and_return(import_jid)
 
-        project.add_import_job
+        expect(project.add_import_job).to eq(import_jid)
       end
     end
 
@@ -1748,9 +1758,8 @@ describe Project do
       it 'schedules a RepositoryImportWorker job' do
         project = create(:project, import_url: generate(:url))
 
-        expect(RepositoryImportWorker).to receive(:perform_async).with(project.id)
-
-        project.add_import_job
+        expect(RepositoryImportWorker).to receive(:perform_async).with(project.id).and_return(import_jid)
+        expect(project.add_import_job).to eq(import_jid)
       end
     end
   end

spec/workers/repository_import_worker_spec.rb

@@ -22,8 +22,8 @@ describe RepositoryImportWorker do
       it 'hide the credentials that were used in the import URL' do
         error = %q{remote: Not Found fatal: repository 'https://user:pass@test.com/root/repoC.git/' not found }
 
+        project.update_attributes(import_jid: '123')
         expect_any_instance_of(Projects::ImportService).to receive(:execute).and_return({ status: :error, message: error })
-        allow(subject).to receive(:jid).and_return('123')
 
         expect do
           subject.perform(project.id)

spec/workers/stuck_import_jobs_worker_spec.rb

@@ -8,29 +8,29 @@ describe StuckImportJobsWorker do
     allow_any_instance_of(Gitlab::ExclusiveLease).to receive(:try_obtain).and_return(exclusive_lease_uuid)
   end
 
-  describe 'long running import' do
-    let(:project) { create(:project, import_jid: '123', import_status: 'started') }
+  describe 'with started import_status' do
+    let(:project) { create(:project, :import_started, import_jid: '123') }
 
-    before do
+    describe 'long running import' do
+      it 'marks the project as failed' do
         allow(Gitlab::SidekiqStatus).to receive(:completed_jids).and_return(['123'])
-    end
 
-    it 'marks the project as failed' do
         expect { worker.perform }.to change { project.reload.import_status }.to('failed')
       end
     end
 
     describe 'running import' do
-    let(:project) { create(:project, import_jid: '123', import_status: 'started') }
-
-    before do
+      it 'does not mark the project as failed' do
         allow(Gitlab::SidekiqStatus).to receive(:completed_jids).and_return([])
-    end
 
-    it 'does not mark the project as failed' do
-      worker.perform
+        expect { worker.perform }.not_to change { project.reload.import_status }
+      end
 
-      expect(project.reload.import_status).to eq('started')
+      describe 'import without import_jid' do
+        it 'marks the project as failed' do
+          expect { worker.perform }.to change { project.reload.import_status }.to('failed')
+        end
+      end
     end
   end
 end