How can you define a Celery task that retries automatically on failure up to 3 times with a 5-second delay between tries?

hard📝 Application Q9 of 15

Flask - Background Tasks

ASet <code>max_retries=3</code> in Flask app config and use <code>@celery_app.task</code> normally.

BManually call the task again 3 times inside the function.

CUse <code>@celery_app.task(retry=True, retries=3)</code> without extra code.

Use <code>@celery_app.task(bind=True, max_retries=3)</code> and call <code>self.retry(countdown=5)</code> inside the task on exception.

Step-by-Step Solution

Solution:

Step 1: Use bind=True to access task instance
This allows calling self.retry() inside the task.
Step 2: Configure retries and countdown
Set max_retries=3 in decorator and call self.retry(countdown=5) on exceptions to retry with delay.
Final Answer:
Use @celery_app.task(bind=True, max_retries=3) and call self.retry(countdown=5) inside the task on exception. -> Option D
Quick Check:
Bind task and call self.retry() for retries [OK]

Quick Trick: Use bind=True and self.retry() for retries [OK]

Common Mistakes:

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