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From "Alessio Palma (JIRA)" <>
Subject [jira] [Created] (AIRFLOW-1778) Task_instance and Dag_run recycle
Date Thu, 02 Nov 2017 14:30:00 GMT
Alessio Palma created AIRFLOW-1778:

             Summary: Task_instance and Dag_run recycle
                 Key: AIRFLOW-1778
             Project: Apache Airflow
          Issue Type: Wish
          Components: DagRun
    Affects Versions: 1.8.1
            Reporter: Alessio Palma

Hello, I'm not sure this is a real issue but something strange happened on our airflow installation.

We started a dag which did not complete due to some issues on Hadoop, so we delete all the
dag_run affected and left untouched the task_instances  waited for it to complete but... 

1. Every dag restarted with the correct execution date
2. No processor executed for real
3. airflow used the old task_instance record.

So the question is... it was so bad just to delete the dag_run without deleting the task_instances?
 Also... If it is bad to delete the dag_run, why it is possible to execute this action from
the admin menu? 

Should the delete dag_run option to be removed? 

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