exit set_metadata with error

                if filename and object_id:

                    unnamed_id_to_path[object_id] = os.path.join(job_context.job_working_directory, filename)

    set_meta_ok = True

    for output_name, output_dict in outputs.items():

        dataset_instance_id = output_dict["id"]

        klass = getattr(galaxy.model, output_dict.get("model_class", "HistoryDatasetAssociation"))

        except Exception:

            with open(filename_results_code, "w+") as tf:

                json.dump((False, traceback.format_exc()), tf)  # setting metadata has failed somehow

            set_meta_ok = False

    if export_store:

        export_store.push_metadata_files()

        export_store._finalize()

    write_job_metadata(tool_job_working_directory, job_metadata, set_meta, tool_provided_metadata)

    if not set_meta_ok:

        os.exit(1)

def validate_and_load_datatypes_config(datatypes_config):