BullMQ, a Node.js library for handling jobs and messages in a queue, provides mechanisms to handle errors. Here are various strategies:
When defining a processor for jobs, it's important to catch any potential errors that might be thrown. If uncaught, these exceptions could cause your queue processing to terminate unexpectedly.
In this example, any errors thrown during the processing of a job are caught and logged, then re-thrown. BullMQ automatically handles failed jobs by moving them to a dedicated
Failed jobs can be retried manually or automatically based on a retry strategy.
In the first part, BullMQ is configured to automatically retry failed jobs up to a fixed number of times. In the second part, failed jobs are manually retrieved and retried.
BullMQ emits events related to the life cycle of jobs which can be used to handle errors or track failures. For instance, you can listen for a
failed event on your job queue:
In the above code, an event listener is added to log any job failures.
Remember that error handling strategies depend on the specific requirements and nature of your jobs. Some jobs might be safe to retry multiple times, while others might need manual intervention after failure.