I have following dag
task_a >> task_b>> task_c
task_b has all_done trigger rule
task_c has all_success trigger rule
if task a fails, will task_c will get executed?
Airflow trigger_rule for grandparent tasks
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1 Answers
Yes, in that scenario task_c will be executed.
Trigger Rules consider the statuses of directly upstream tasks.
In your case the end result if task_a failed will be:
Explanation: task_a fails, task_b is executed because task_a is finished (due to all_done rule), task_c consider only task_b status which is all_success thus task_c can also run.
If you don't want task_c to be executed when task_a fails you need to define:
task_a >> task_b>> task_c
task_a >> task_c
Which will give:
in that scenario task_c is set to upstream_failed.
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