on exit event does not fire in AWS Lambda

Question

When I run this code on AWS Lambda nothing gets logged, although when I invoke this locally using serverless (framework), it does log. Is there anything that I am missing?

exports.handler = async () => {
  process.on("exit", (code) => {
    console.log("process exit code: ", code);
  });
};

I'm not 100% sure but I believe that you can't process a code once the Lambda code is finished. — Raul Barreto, Sep 10 '20 at 12:54

score 3 · Accepted Answer · answered Sep 10 '20 at 12:59

There is no such event in AWS Lambda to know when the container is stopped. The "Exit" event that fired when you run your code locally it a Node.js event and it is not supported by the AWS Lambda implementation.

You can find here a discussion on how to handle DB connection: AWS Lambda Container destroy event

score 2 · Answer 2 · answered Sep 10 '20 at 13:18

2

Lambda endpoints stay alive even after API responds. The actual exit happens when the container that processed the request gets disposed after 15 minutes.

answered Sep 10 '20 at 13:18

Allan Chua

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on exit event does not fire in AWS Lambda

2 Answers2