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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2019/09/24 11:34:26 UTC
[GitHub] [airflow] potiuk commented on a change in pull request #6175:
[AIRFLOW-5545] Fixes recursion in DAG cycle testing
potiuk commented on a change in pull request #6175: [AIRFLOW-5545] Fixes recursion in DAG cycle testing
URL: https://github.com/apache/airflow/pull/6175#discussion_r327562210
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File path: airflow/models/dag.py
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@@ -1467,22 +1467,26 @@ def _test_cycle_helper(self, visit_map, task_id):
"""
from airflow.models.dagbag import DagBag # Avoid circular imports
- # print('Inspecting %s' % task_id)
- if visit_map[task_id] == DagBag.CYCLE_DONE:
- return False
-
- visit_map[task_id] = DagBag.CYCLE_IN_PROGRESS
-
- task = self.task_dict[task_id]
- for descendant_id in task.get_direct_relative_ids():
- if visit_map[descendant_id] == DagBag.CYCLE_IN_PROGRESS:
- msg = "Cycle detected in DAG. Faulty task: {0} to {1}".format(
- task_id, descendant_id)
+ path, visited = [task_id], []
+
+ while path:
+ current_task_id = path.pop()
+ if visit_map[current_task_id] == DagBag.CYCLE_DONE:
+ return False
Review comment:
return False -> return
The return value does not seem to be checked and there is no 'return True'
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