terrynie123 opened a new issue #18621:
URL: https://github.com/apache/airflow/issues/18621


   ### Describe the issue with documentation
   
   I have a dag file like this:
   ```python
   from airflow import DAG
   from datetime import datetime, timedelta
   import amqp
   import json
   from airflow.operators.bash import BashOperator
   from airflow.utils.dates import days_ago
   import time
   
   args = {
       'owner': 'airflow',
       'depends_on_past': False,
       'start_date': datetime(2020, 2, 24),
       'email': ['[email protected]'],
       'email_on_failure': False,
       'email_on_retry': False,
       'retries': 1,
       'retry_delay': timedelta(minutes=5),
   }
   
   conn = amqp.Connection(host="localhost:5672", userid="xxxx", 
password="xxxx", virtual_host="/")
   conn.connect()
   channelx=conn.channel()
   
   channelx.queue_declare(queue="airflow", durable=True)
   
   def create_dag(dag_id, schedule_interval, command):
       with DAG(
           dag_id=dag_id,
           default_args=args,
           start_date=days_ago(2),
           schedule_interval=schedule_interval,
       ) as dag:
           task = BashOperator(
               task_id="sdynamic.test." + dag_id,
               bash_command=command,
               default_args=args,
               dag=dag,
           )
       return dag
   
   def consumer(message):
       _json = json.loads(message.body.decode('utf-8'))
       _dag = dag.create_dag(_json["dag_id"], _json["schedule_interval"], 
_json["command"])
       globals()[_json["dag_id"]] = _dag
       channelx.basic_ack(message.delivery_tag)
   
   start_time = time.time()
   channelx.basic_consume("airflow", callback=consumer)
   while time.time() - start_time < 20:
        conn.drain_events()
   
   conn.close()
   ```
   
   this code can create dag successfully. but when trigger this dag, it will 
throw a exception:
   
   
![image](https://user-images.githubusercontent.com/62755872/135383518-7cdc11ac-2e2b-4f1a-9e9e-ec078ff89738.png)
   
   
   ### How to solve the problem
   
   _No response_
   
   ### Anything else
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
   


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