Failed job handling in Laravel - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a failed job in Laravel?

A failed job is a queued task that did not complete successfully due to an error or exception during its execution.

beginner

How does Laravel store failed jobs by default?

Laravel stores failed jobs in a database table called failed_jobs which keeps details like the job payload, error message, and failure time.

beginner

Which Artisan command is used to retry all failed jobs in Laravel?

The command php artisan queue:retry all retries all jobs listed in the failed jobs table.

intermediate

What is the purpose of the failed() method in a Laravel job class?

The failed() method lets you define custom logic to run when a job fails, such as sending notifications or cleaning up resources.

intermediate

How can you configure Laravel to automatically delete failed jobs after a certain time?

You can schedule the queue:prune-failed Artisan command in Laravel's scheduler to remove failed jobs older than a specified number of days.

Where does Laravel store failed jobs by default?

A In the <code>failed_jobs</code> database table

B In the <code>jobs</code> table

C In log files only

D In cache memory

Laravel uses the failed_jobs table to keep track of jobs that did not complete successfully.

Which command retries a specific failed job by its ID?

A php artisan queue:retry {id}

B php artisan queue:work {id}

C php artisan queue:flush {id}

D php artisan queue:forget {id}

The queue:retry {id} command retries the failed job with the given ID.

What method can you add to a job class to handle failure logic?

A failHandler()

B handleFailure()

C onFail()

D failed()

The failed() method is called automatically when a job fails.

How do you remove all failed jobs from the database?

A php artisan queue:forget

B php artisan queue:clear

C php artisan queue:flush

D php artisan queue:prune-failed

The queue:flush command deletes all records from the failed jobs table.

What should you do to handle failed jobs gracefully in production?

A Ignore failed jobs as they fix themselves

B Implement the <code>failed()</code> method and monitor failed jobs regularly

C Delete the failed jobs table

D Disable the queue system

Handling failures with the failed() method and monitoring helps keep your app stable.

Explain how Laravel handles failed jobs and how you can retry them.

Think about where failures are saved and how you can fix them.

Describe how to clean up old failed jobs automatically in Laravel.

Consider how to keep the failed jobs table tidy over time.