disable retry attempts for Import/Export until that is fixed

app/models/project.rb

@@ -568,6 +568,8 @@ class Project < ActiveRecord::Base
         RepositoryForkWorker.perform_async(id,
                                            forked_from_project.repository_storage_path,
                                            forked_from_project.disk_path)
+      elsif gitlab_project_import?
+        RepositoryImportWorker.set(retry: false).perform_async(self.id)
       else
         RepositoryImportWorker.perform_async(self.id)
       end

app/workers/repository_import_worker.rb

@@ -20,7 +20,12 @@ class RepositoryImportWorker
     # to those importers to mark the import process as complete.
     return if service.async?
 
-    raise result[:message] if result[:status] == :error
+    if result[:status] == :error
+
+      fail_import(project, result[:message]) if project.gitlab_project_import?
+
+      raise result[:message]
+    end
 
     project.after_import
   end
@@ -33,4 +38,8 @@ class RepositoryImportWorker
     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
 end

lib/gitlab/import_export/shared.rb

@@ -20,7 +20,7 @@ module Gitlab
         error_out(error.message, caller[0].dup)
         @errors << error.message
         # Debug:
-        Rails.logger.error(error.backtrace.join("\n"))
+        Rails.logger.error(error.backtrace&.join("\n"))
       end
 
       private