Question

A developer writes a Lambda function that calls a third-party payment API over HTTPS. During periodic load spikes, the third-party API returns HTTP 429 (Too Many Requests) responses, and many transactions fail. The developer wants the function to automatically re-attempt these calls in a way that reduces the chance of overwhelming the API and avoids many clients retrying at exactly the same moment. Which approach should the developer implement in the function code?

Accepted Answer

Implement retries with exponential backoff and add random jitter to the wait interval between attempts.

Answer

Retry the failed calls immediately in a tight loop until they succeed.

Answer

Increase the Lambda function timeout to the maximum value so the call eventually succeeds.

Answer

Use a fixed 5-second delay between each retry attempt for all invocations.