If you‘ve used AWS Lambda to handle large amounts of data, you have probably also seen this error message: { "errorType": "Function.ResponseSizeTooLarge", "errorMessage": "Response payload size exceeded maximum allowed payload size (6291556 bytes)." } Whether you’re having trouble staying within the limit or just want to know more about it…

lambdashell.com was registered on July 26th, 2018 and hosts a website made by Caleb Sima, who has been Chief Security Officer at stock-trading app Robinhood since February 2021. The website has one page that asks the question “Is serverless insecure?” alongside the following challenge: This is a simple AWS lambda…

This is the first post in a two part series. The second part presents an alternate solution which is generally better, but has some trade-offs. I recommend reading both. Another Way to Trigger a Lambda Function Every 5–10 Seconds This follow up to my recent post presents another solution which uses Step Functions instead of Lambda & SQS. It has…zaccharles.medium.com Last week, Chase Douglas sent out a serverless bat signal asking if anyone knows of a way to trigger a Lambda…

This is the kind of topic that makes me think “why would we want to do that?” and “is there something else we can do instead?”. …

Update 2023-06-08: These APIs are officially available and documented now. See the announcement blog post: https://aws.amazon.com/blogs/aws/a-new-set-of-apis-for-amazon-sqs-dead-letter-queue-redrive/ In December 2021, AWS announced dead-letter queue redrive to source queues for SQS. …

In January 2023, AWS announced a new for Lambda called Maximum Concurrency. Shortly after the announcement, I was asked if it’s a solution to the “SQS overpull” problem that I first wrote about way back in 2019. The answer is yes, it is a solution! However, You still need to…

This is a follow up to my recent post titled How to Trigger a Lambda Function Every 5–10 Seconds. I recommend you read that too, but it’s not required. How to Trigger a Lambda Function Every 5–10 Seconds This post presents a solution involving EventBridge, two Lambda functions and an SQS queue. It’s surprisingly accurate…zaccharles.medium.com As is often the case in software, this problem has more than one possible solution. One awesome thing about serverless is…

An API was recently being designed at work that would enable restaurant owners to request changes to their logo and other images. The idea is that restaurants use a website to upload a new image and trigger a review process. I was asked to advise on how we should handle…

The day we’ve been waiting for came yesterday when support for .NET Core 3.1 on AWS Lambda was announced. If you recall, AWS’ policy is to only support LTS versions of .NET Core, so it was only a matter of time. Almost four months since 3.1 was announced, actually. To…