ephraimbuddy commented on code in PR #66773:
URL: https://github.com/apache/airflow/pull/66773#discussion_r3228063001
##########
airflow-core/src/airflow/jobs/scheduler_job_runner.py:
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@@ -2938,7 +2944,10 @@ def _find_task_instances_without_heartbeats(self, *,
session: Session) -> list[T
.join(DM, TI.dag_id == DM.dag_id)
.where(
TI.state.in_((TaskInstanceState.RUNNING,
TaskInstanceState.RESTARTING)),
- TI.last_heartbeat_at < limit_dttm,
+ or_(
+ TI.last_heartbeat_at < limit_dttm,
Review Comment:
Can you walk me through how `TI.last_heartbeat_at ` can be null for a
running task as I thought it's set here:
https://github.com/apache/airflow/blob/07bf075b94fb8679ac3f83b02c04226e5696fe0b/airflow-core/src/airflow/api_fastapi/execution_api/routes/task_instances.py#L237
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