Hi Niebler, Like Ash mentioned this is fixed for 1.10.11 already.
This was first reported in following Github issue: - https://github.com/apache/airflow/issues/8247 And PR that fixes it for v1-10-test: https://github.com/apache/airflow/pull/8411 And https://github.com/apache/airflow/pull/8501 also fixes it in Master. Regards, Kaxil On Mon, May 4, 2020, 09:21 Ash Berlin-Taylor <a...@apache.org> wrote: > I think this was fixed by this PR - aiming for 1.10.11 > > https://github.com/apache/airflow/pull/8501 > > On 4 May 2020 07:41:55 BST, "Niebler Thomas (DC-IH/SDL1)" > <thomas.nieb...@boschrexroth.de.INVALID> wrote: > >Hi all, > > > >I have a probably rather special use case scenario: > >Using Airflow 1.10.10, I would like to physically decouple the > >Webserver and the Scheduler for some secure access reasons. According > >to https://airflow.apache.org/docs/stable/dag-serialization.html, this > >should be a piece of cake with Airflow 1.10.10, since DAGs are stored > >in the Metadata database and the webserver does not need to access the > >DAG files anymore. The metadata database is of course reachable by both > >Airflow instances: > > > >Docker Image Instance: Airflow Webserver <----> Docker Image Instance: > >Metadata database <----> Physical Machine: Airflow Scheduler > > > >However, every time I start a DAG manually, it crashes with a rather > >lengthy error message: > > > >File "/usr/local/lib/python3.7/site-packages/airflow/www/views.py", > >line 1255, in trigger > > external_trigger=True > >File "/usr/local/lib/python3.7/site-packages/airflow/utils/db.py", line > >74, in wrapper > > return func(*args, **kwargs) > >File "/usr/local/lib/python3.7/site-packages/airflow/models/dag.py", > >line 1818, in create_dagrun > > return self.get_dag().create_dagrun(run_id=run_id, > >AttributeError: 'NoneType' object has no attribute 'create_dagrun' > > > >This basically boils down to self.get_dag() not having set the Boolean > >flag store_serialized_flags to True (or whatever value the config is > >set to), but always using False (the default value). > >This then leads to Airflow attempting to read the DAG file, ignoring > >the DAG database entry and returning None, which obviously has no > >attribute create_dagrun. > > > >I’ve got several questions here now: > > > >1. Is my scenario even possible or am I overlooking something rather > >obvious? > >2. Is the crashing DAG behavior intended like that? It rather seems > >like a bug to me. > >3. Is it worth fixing this issue (if it is one) for Airflow 1.10.x, > >considering that Airflow 2.0.0 does not even contain the corresponding > >classes anymore and takes a different path? > > > >Mit freundlichen Grüßen / Best regards > > > >Dr. Thomas Niebler > >Data Scientist > >Sales Data Lab, Analytics DC-IH/SDL1 > > > >Tel. +49 9352 18-2392 > >Fax +49 9352 18-0 > >thomas.nieb...@boschrexroth.de<mailto:thomas.nieb...@boschrexroth.de> > >www.boschrexroth.com > > > >Bosch Rexroth AG > >Partensteiner Straße 23 > >97816 Lohr am Main > >GERMANY > > > >[BOSCH REXROTH]<http://www.boschrexroth.com/> > > > > > > > >Sitz: Stuttgart, Registergericht: Amtsgericht Stuttgart HRB 23192 > >Vorstand: Rolf Najork (Vorsitzender), Dr. Markus Forschner, Dr. Heiner > >Lang, Reinhard Schäfer, Dr. Marc Wucherer > >Vorsitzender des Aufsichtsrats: Christoph Kübel > > > >
