New Lambda Timeout permanent crash

Description

Lambda allows 10s for functions to initialize.

Previously when the runtime or sandbox crashed, function timed out, or ran out of memory - it would reinitialize causing a mini cold start. This still happens, but now the re-initialization is limited to the function timeout.

Impact

If you have a Lambda function with a very short timeout and it crashes, it may never be able to re-initialize.

Example

1. Deploy with cdk deploy
2. Curl the output url
3. Add <url>?crash=true to the end of the url
4. Curl the output url again without ?crash=true

Result: The function will never successfully re-initialize.