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From "Joe Schmid (JIRA)" <>
Subject [jira] [Commented] (AIRFLOW-1142) SubDAG Tasks Not Executed Even Though All Dependencies Met
Date Tue, 25 Apr 2017 05:11:04 GMT


Joe Schmid commented on AIRFLOW-1142:

We didn't do extensive testing on 1.8, but I just ran that test DAG successfully 5 times in
a row on 1.8 (installed via pip). Based on that, it seems like a bug introduced in 1.8.1.

> SubDAG Tasks Not Executed Even Though All Dependencies Met
> ----------------------------------------------------------
>                 Key: AIRFLOW-1142
>                 URL:
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: subdag
>    Affects Versions: 1.8.1
>         Environment: 1.8.1rc1+incubating, Celery
>            Reporter: Joe Schmid
>            Priority: Blocker
>         Attachments: 2017-04-24T23-20-38-776547, Test_Nested_SubDAG_0.png, Test_Nested_SubDAG_1-Zoomed.png,
> Testing on 1.8.1rc1, we noticed that tasks in subdags were not getting executed even
though all dependencies had been met.
> We were able to create a simple test DAG that re-creates the issue. Attached is a test
DAG, the log file of the subdag operator that shows it fails to run even though dependencies
are met, and screenshots of what the UI looks like.
> This is definitely a regression as we have many similarly constructed DAGs that have
been running successfully on a pre-v1.8 version (a fork of for some time.

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