Python AirflowException:conn_id`http_default`isn'；尝试在应用程序中运行HTTP运算符时出现t定义的错误

我有一个DAG，作为最后一个任务，它需要发送一个HTTP请求来触发Google云功能。我正在测试它，但是HTTP任务失败了

任务定义：

send_standby_signal = ho.SimpleHttpOperator(
        task_id = 'send-k8s-cluster-standby-signal',
        endpoint = 'https://path-to-function-endpoint', 
        method = 'POST',
        data = '',
        trigger_rule = trigger_rule.TriggerRule.ALL_DONE
)

错误：

[2019-10-02 13:57:29,088] {http_operator.py:87} INFO - Calling HTTP method
[2019-10-02 13:57:29,122] {__init__.py:1580} ERROR - The conn_id `http_default` isn't defined
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/airflow/models/__init__.py", line 1441, in _run_raw_task
    result = task_copy.execute(context=context)
  File "/usr/local/lib/python3.7/site-packages/airflow/operators/http_operator.py", line 92, in execute
    self.extra_options)
  File "/usr/local/lib/python3.7/site-packages/airflow/hooks/http_hook.py", line 101, in run
    session = self.get_conn(headers)
  File "/usr/local/lib/python3.7/site-packages/airflow/hooks/http_hook.py", line 60, in get_conn
    conn = self.get_connection(self.http_conn_id)
  File "/usr/local/lib/python3.7/site-packages/airflow/hooks/base_hook.py", line 80, in get_connection
    conn = random.choice(cls.get_connections(conn_id))
  File "/usr/local/lib/python3.7/site-packages/airflow/hooks/base_hook.py", line 75, in get_connections
    conns = cls._get_connections_from_db(conn_id)
  File "/usr/local/lib/python3.7/site-packages/airflow/utils/db.py", line 73, in wrapper
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/airflow/hooks/base_hook.py", line 58, in _get_connections_from_db
    "The conn_id `{0}` isn't defined".format(conn_id))
airflow.exceptions.AirflowException: The conn_id `http_default` isn't defined

---

答案很简单，真的。我没有在Airflow Connections中定义

http\u default

。多么尴尬。

我在airflow UI中定义了连接，但我仍然面临同样的问题。正在寻找解决方案。对我来说，同样的问题，连接是在Airflow UI上定义的，但DAG无法访问它。。。奇怪：(