How can I handle errors in a Node.js pub/sub system?

How can I handle errors in a Node.js pub/sub system?

In a Node.js pub/sub system, you can handle errors by implementing try-catch blocks around your message processing logic.

What if the subscriber fails to process a message?

You can implement a retry mechanism or log the error for further analysis. Consider using a dead-letter queue for unprocessable messages.

Is there a way to notify the publisher about the error?

Yes, you can send an acknowledgment back to the publisher or emit an error event that the publisher can listen to.

Can you give me an example of a retry mechanism?

Sure! You can use a simple loop with a maximum retry count and a delay between attempts to retry processing the message.