问题
I have a dynamic airflow dag(backfill_dag) that basically reads admin variable(Json) and builds it self. Backfill_dag is used for backfilling/history loading, so for example if I wants to history load dag x,y, n z in some order(x n y run in parallel, z depends on x) then I will mention this in a particular json format and put it in admin variable of backfill_dag.
Backfill_dag now:
parses the Json, renders the tasks of the dags x,y, and z, and builds itself dynamically with x and y in parallel and z depends on x
Issue:
It works good as long as Backfill_dag can list_dags in 30 seconds.
Since Backfill_dag is bit complex here, it takes more than 30 seconds to list(airflow list_dags -sd Backfill_dag.py), hence it times out and the dag breaks.
Tried:
I tried to set a parameter, dagbag_import_timeout = 100, in airflow.cfg file of the scheduler, but that did not help.
回答1:
I fixed my code.
Fix: I had some aws s3 cp command in my dag that were running durring compilation hence my list_dags command was taking more than 30 seconds, i removed them(or had then in a BashOperator task), now my code compiles(list_dags) in couple of seconds.
来源：https://stackoverflow.com/questions/51603882/airflow-list-dag-times-out-exactly-after-30-seconds