DAG not visible in Web-UI

Question

I am new to Airflow. I am following a tutorial and written following code.

from airflow import DAG
from airflow.operators.python_operator import PythonOperator
from datetime import datetime, timedelta
from models.correctness_prediction import CorrectnessPrediction

default_args = {
    'owner': 'abc',
    'depends_on_past': False,
    'start_date': datetime.now(),
    'email': ['[email protected]'],
    'email_on_failure': False,
    'email_on_retry': False,
    'retries': 1,
    'retry_delay': timedelta(minutes=5)
}

def correctness_prediction(arg):
    CorrectnessPrediction.train()

dag = DAG('daily_processing', default_args=default_args)

task_1 = PythonOperator(
    task_id='print_the_context',
    provide_context=True,
    python_callable=correctness_prediction,
    dag=dag)

On running the script, it doesn't show any errors but when I check for dags in Web-UI it doesn't show under Menu->DAGs

But I can see the scheduled job under Menu->Browse->Jobs

I also cannot see anything in $AIRFLOW_HOME/dags. Is it supposed to be like this only? Can someone explain why?

Answer 1

Run airflow list_dags to check, whether the dag file is located correctly.

For some reason, I didn't see my dag in the browser UI before I executed this. Must be issue with browser cache or something.

If that doesn't work, you should just restart the webserver with airflow webserver -p 8080 -D