Question

This SQS batch Lambda (Python) processes up to 10 messages per invocation. The AI wrapped each message in try/except so one failure doesn't kill the batch. QA reports that failed messages silently disappear instead of retrying. What's the flaw?

1def handler(event, context):2    for record in event["Records"]:3        try:4            process(json.loads(record["body"]))5        except Exception as e:6            logger.error("failed: %s", e)7    return {"ok": True}