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https://issues.apache.org/jira/browse/AIRFLOW-5500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17088260#comment-17088260
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ASF GitHub Bot commented on AIRFLOW-5500:
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cBournhonesque commented on issue #8081:
URL: https://github.com/apache/airflow/pull/8081#issuecomment-616934693
It seems like one side-effect is that clicking on 'clear tasks recursive' on
the UI only clears the tasks of the direct subdags, not all nested subdags.
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> Bug in trigger api endpoint
> ----------------------------
>
> Key: AIRFLOW-5500
> URL: https://issues.apache.org/jira/browse/AIRFLOW-5500
> Project: Apache Airflow
> Issue Type: Bug
> Components: api
> Affects Versions: 1.10.1
> Reporter: Deavarajegowda M T
> Priority: Critical
> Attachments: 3level.py
>
>
> Unable to trigger workflow with nested sub dags, getting following error:
> sqlalchemy.exc.IntegrityError: (psycopg2.IntegrityError) duplicate key value
> (dag_id,execution_date)=('dummy.task1.task_level1.task_level2','2019-09-10
> 13:00:27+00:00') violates unique constraint
> "dag_run_dag_id_execution_date_key"
> trigger_dag for nested sub_dags is called twice.
>
> fix:
> in airflow/api/common/experimental/trigger_dag.py -
> while populating subdags for a dag, each subdag's subdags is also populated
> to main dag.
> So no need to repopulate subdags for each subdag separately.
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