XD-DENG commented on a change in pull request #3698: [AIRFLOW-2855] Check Cron
Expression Validity in DagBag.process_file()
URL: https://github.com/apache/incubator-airflow/pull/3698#discussion_r207788097
##########
File path: airflow/models.py
##########
@@ -414,6 +427,16 @@ def process_file(self, filepath, only_if_updated=True,
safe_mode=True):
self.bag_dag(dag, parent_dag=dag, root_dag=dag)
found_dags.append(dag)
found_dags += dag.subdags
+ if isinstance(dag._schedule_interval,
six.string_types):
+ croniter(dag._schedule_interval)
+ except (CroniterBadCronError,
+ CroniterBadDateError,
+ CroniterNotAlphaError) as cron_e:
+ self.log.exception("Failed to bag_dag: %s",
dag.full_filepath)
+ self.import_errors[dag.full_filepath] = \
+ "Invalid Cron expression: " + str(cron_e)
+ self.file_last_changed[dag.full_filepath] = \
+ file_last_changed_on_disk
Review comment:
One is for `.py` DAG file, and the another is for package DAG file (`.zip`
file).
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