trigger_dag writes creates dag_run record but doesn't start DAG. Example example_trigger_controller_dag doesn't start also

[Serega Sheypak]

Hi, I'm trying to figure out how does trigger_dag works.

here is my command and output:

bash-4.1# airflow trigger_dag c1604_na 

[2016-04-19 14:15:06,454] {__init__.py:36} INFO - Using executor SequentialExecutor 

[2016-04-19 14:15:06,692] {cli.py:107} INFO - Created <DagRun c1604_na @ 2016-04-19 14:15:06.673657: manual__2016-04-19T14:15:06.673657, externally triggered: True>

I go to webserver UI and see that there is the dag_run in RUNNING stage.

Database table has the the record for the dag_run I see. But nothing happens. DAG doesn't start.

My DAG default args are:

default_args = {

    'owner': 'airflow',

    'start_date': datetime.now()

}

DAG schedule_interval is set to '@once'

BTW, I tried to run example_trigger_controller_dag

bash-4.1# airflow trigger_dag example_trigger_controller_dag

[2016-04-19 14:21:42,073] {__init__.py:36} INFO - Using executor SequentialExecutor

[2016-04-19 14:21:42,318] {cli.py:107} INFO - Created <DagRun example_trigger_controller_dag @ 2016-04-19 14:21:42.299106: manual__2016-04-19T14:21:42.299106, externally triggered: True>

Webserver UI tab named "DAGs" is not updated also. I see DAGs there, but their statues are not updated. 

[Siddharth Anand]

Are you running a scheduler? Also, is your entire system running on UTC (DB, scheduler, webserver)?

-s

[Serega Sheypak]

Hi, yes, you are right, it was my mistake.

Backfill worked out of the box w/o scheduler and it confused me. I've started scheduler and now it runs.