Airflow ExternalTask​​Sensor 执行超时 [英] Airflow ExternalTaskSensor execution timeout

问题描述

我正在使用 airflow.operators.sensors.ExternalTask​​Sensor 让一个 Dag 等待另一个.

I'm using airflow.operators.sensors.ExternalTaskSensor to make one Dag wait for another.

dag = DAG(
    'dag2',
    default_args={
        'owner': 'Me',
        'depends_on_past': False,
        'start_date': start_datetime,
        'email': ['[e-mail]'],
        'email_on_failure': True,
        'email_on_retry': False,
        'retries': 2,
        'retry_delay': timedelta(minutes=10),
    },
    template_searchpath="%s/me/resources/" % DAGS_FOLDER,
    schedule_interval="{} {} * * *".format(minute, hour),
    max_active_runs=1
)

wait_for_dag1 = ExternalTaskSensor(
    task_id='wait_for_dag1',
    external_dag_id='dag1',
    external_task_id='dag1_task1',
    dag=dag
)

如果上游 Dag 发生严重错误并且未能在给定时间段内完成，我希望上游 Dag(ExternalTask​​Sensor 运算符)也崩溃，而不是永远挂起.

If something seriously wrong happens with upstream Dag and it fails to complete during the given time period, I want upstream Dag (ExternalTaskSensor operator) crash as well, instead of hanging forever.

如何向 ExternalTask​​Sensor 添加超时?

我正在查看文档，但它似乎没有 timeout 参数或类似的参数.我该怎么办?
https://airflow.readthedocs.io/en/stable/_modules/airflow/sensors/external_task_sensor.html

I'm looking into documentation, but it does not seem to have a timeout parameter or something similar. What should I do?
https://airflow.readthedocs.io/en/stable/_modules/airflow/sensors/external_task_sensor.html

推荐答案

ExternalTask​​Sensor 确实以秒为单位接受 timeout 参数.它从 BaseSensorOperator (https://airflow.apache.org/docs/apache-airflow/stable/_api/airflow/sensors/base/index.html).如果你在实例化时传递它 timeout=60，它会在 60 秒后失败.

The ExternalTaskSensor does take a timeout argument in seconds. It inherits the argument from BaseSensorOperator (https://airflow.apache.org/docs/apache-airflow/stable/_api/airflow/sensors/base/index.html). If you pass it timeout=60 on instantiation, it will fail after 60 seconds.

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