ashb commented on code in PR #54103:
URL: https://github.com/apache/airflow/pull/54103#discussion_r2480697365
##########
airflow-core/src/airflow/jobs/scheduler_job_runner.py:
##########
@@ -408,10 +433,63 @@ def _executable_task_instances_to_queued(self, max_tis:
int, session: Session) -
.where(~DM.is_paused)
.where(TI.state == TaskInstanceState.SCHEDULED)
.where(DM.bundle_name.is_not(None))
+ .join(
+ dr_task_concurrency_subquery,
+ TI.run_id == dr_task_concurrency_subquery.c.run_id,
+ isouter=True,
+ )
+ .where(func.coalesce(dr_task_concurrency_subquery.c.dr_count,
0) < DM.max_active_tasks)
Review Comment:
Yup, you are likely right.
I'm testing now with
```
for dag in dag_45_tasks dag_250_tasks dag_470_tasks dag_10_tasks
dag_1000_tasks ;do airflowctl dagrun trigger --dag-id $dag --dag-run-id run1;
done
for dag in dag_45_tasks dag_250_tasks dag_470_tasks dag_10_tasks
dag_1000_tasks ;do airflowctl dagrun trigger --dag-id $dag --dag-run-id run2;
done
```
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