[jira] [Created] (AIRFLOW-5198) Avoid loading DAGs during migration cc1e65623dc7_add_max_tries_column_to_task_instance

["Victor Villas Bôas Chaves (JIRA)" <ji...@apache.org>]

Victor Villas Bôas Chaves created AIRFLOW-5198:
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             Summary: Avoid loading DAGs during migration cc1e65623dc7_add_max_tries_column_to_task_instance
                 Key: AIRFLOW-5198
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-5198
             Project: Apache Airflow
          Issue Type: Improvement
          Components: database
    Affects Versions: 1.10.4
            Reporter: Victor Villas Bôas Chaves


https://issues.apache.org/jira/browse/AIRFLOW-1366 introduced a migration to add a `max_tries` column to the `task_instance` table.

Currently, that migration imports and instantiates the `DagBag` object, which will load example DAGs if the setting is activated, and will fail. It fails because at this point because loading DAGs requires later migrations to have been run.

A simple fix would be to force `{color:#e01e5a}include_examples=False{color}` in the DagBag, but we should strive not lot load DAGs at all and only retrieve the necessary data for the migration.



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