Add retry mechanisam to after import

- use import_failure_service
- add missing specs

app/services/projects/after_import_service.rb

@@ -12,7 +12,9 @@ module Projects
       service = Projects::HousekeepingService.new(@project)
 
       service.execute do
-        repository.delete_all_refs_except(RESERVED_REF_PREFIXES)
+        import_failure_service.with_retry(action: 'delete_all_refs') do
+          repository.delete_all_refs_except(RESERVED_REF_PREFIXES)
+        end
       end
 
       # Right now we don't actually have a way to know if a project
@@ -26,6 +28,10 @@ module Projects
 
     private
 
+    def import_failure_service
+      @import_failure_service ||= Gitlab::ImportExport::ImportFailureService.new(@project)
+    end
+
     def repository
       @repository ||= @project.repository
     end

spec/services/projects/after_import_service_spec.rb

@@ -20,7 +20,7 @@ describe Projects::AfterImportService do
       allow(housekeeping_service)
         .to receive(:execute).and_yield
 
-      expect(housekeeping_service).to receive(:increment!)
+      allow(housekeeping_service).to receive(:increment!)
     end
 
     it 'performs housekeeping' do
@@ -58,6 +58,53 @@ describe Projects::AfterImportService do
       end
     end
 
+    context 'when after import action throw non-retriable exception' do
+      let(:exception) { StandardError.new('after import error') }
+
+      before do
+        allow(repository)
+          .to receive(:delete_all_refs_except)
+          .and_raise(exception)
+      end
+
+      it 'throws after import error' do
+        expect { subject.execute }.to raise_exception('after import error')
+      end
+    end
+
+    context 'when after import action throw retriable exception one time' do
+      let(:exception) { GRPC::DeadlineExceeded.new }
+
+      before do
+        repository.write_ref('refs/pull/1/head', sha)
+        expect(repository)
+          .to receive(:delete_all_refs_except)
+          .and_raise(exception)
+        expect(repository)
+          .to receive(:delete_all_refs_except)
+        .and_call_original
+
+        subject.execute
+      end
+
+      it 'removes refs/pull/**/*' do
+        expect(rugged.references.map(&:name))
+          .not_to include(%r{\Arefs/pull/})
+      end
+
+      it 'records the failures in the database', :aggregate_failures do
+        import_failure = ImportFailure.last
+
+        expect(import_failure.source).to eq('delete_all_refs')
+        expect(import_failure.project_id).to eq(project.id)
+        expect(import_failure.relation_key).to be_nil
+        expect(import_failure.relation_index).to be_nil
+        expect(import_failure.exception_class).to eq('GRPC::DeadlineExceeded')
+        expect(import_failure.exception_message).to be_present
+        expect(import_failure.correlation_id_value).not_to be_empty
+      end
+    end
+
     def rugged
       rugged_repo(repository)
     end