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That’s all folks. We’ve covered creating SNS triggers for Lambda while also implementing a Dead Letter Queue to catch errors from failed invocations. Using serverless for various intermittent calculations is a valid use-case that will only grow in popularity in the future. May 30, 2019 · If you wish to learn more about dead-letter queues, here is a tutorial on Amazon’s website: Configuring an Amazon SQS Dead-Letter Queue. maxNumberOfMessages The ReceiveMessageRequest can receive more than one message at a time if more are available on a queue. Lambda offers two mechanisms for handling function exection failure: Dead Letter Queues (DLQ) and Lambda Destinations. Dead Letter Queues have been available since 2016 and are a great way to handle asynchronous failure situations.