概要
The client has sent too many requests in a given time (rate limiting).
いつ発生するか
Returned when a rate limit is exceeded; a Retry-After header may say how long to wait.
よくある原因
- Rate limit or quota exceeded
- Burst of requests without throttling
- Aggressive polling or bot traffic
解決方法
- Respect the Retry-After header
- Add exponential backoff and throttling
- Cache responses to cut request volume
- Request a higher rate limit if needed