AWS Lambda GoLang错误

Question

Is it OK to panic() when failed to create AWS session? As an opposite, I can just return the error from my handler function (in this case I have to create the session in the handler code, but not in the init()).

The docs say

Lambda will re-create the function automatically

Does it mean the panic always causes the cold-start and is preferred to return error from the handler?

Answer 1

The answer depends on what is going on in init section.

If you create session clients to connect to other services it might be good to panic and cause cold-start than continue container's lifecycle with the failed clients.

Answer 2

Yes. A panic will trigger a cold restart of your code. The use of panic should be reserved for exceptional circumstances; returning an error is to be preferred in most circumstances.