add spec

app/models/project.rb

@@ -569,6 +569,7 @@ class Project < ActiveRecord::Base
                                            forked_from_project.repository_storage_path,
                                            forked_from_project.disk_path)
       elsif gitlab_project_import?
+        # Do not retry on Import/Export until https://gitlab.com/gitlab-org/gitlab-ce/issues/26189 is solved.
         RepositoryImportWorker.set(retry: false).perform_async(self.id)
       else
         RepositoryImportWorker.perform_async(self.id)

app/workers/repository_import_worker.rb

@@ -21,7 +21,6 @@ class RepositoryImportWorker
     return if service.async?
 
     if result[:status] == :error
-
       fail_import(project, result[:message]) if project.gitlab_project_import?
 
       raise result[:message]

spec/workers/repository_import_worker_spec.rb

@@ -52,6 +52,19 @@ describe RepositoryImportWorker do
         end.to raise_error(StandardError, error)
         expect(project.reload.import_jid).not_to be_nil
       end
+
+      it 'updates the error on Import/Export' do
+        error = %q{remote: Not Found fatal: repository 'https://user:pass@test.com/root/repoC.git/' not found }
+
+        project.update_attributes(import_jid: '123', import_type: 'gitlab_project')
+        expect_any_instance_of(Projects::ImportService).to receive(:execute).and_return({ status: :error, message: error })
+
+        expect do
+          subject.perform(project.id)
+        end.to raise_error(StandardError, error)
+
+        expect(project.reload.import_error).not_to be_nil
+      end
     end
 
     context 'when using an asynchronous importer' do