https://techcrunch.com/2018/06/04/rookout-releases-serveless-debugging-tool-for-aws-lambda/

The beauty of serverless computing services like AWS Lambda is that they abstract away the server itself. That enables developers to create applications without worrying about the underlying infrastructure, but it also creates a set of new problems. Without a static server, how do you debug a program that’s running? It’s a challenge that Israeli startup Rookout has solved in its latest release.

The company has achieved this by providing a way to mark the serverless code with “breakpoints.” Rookout can then collect developer-defined information about the serverless code, allowing them to track issues even while the application is live running in a serverless environment.