System Design · Middle · Question 58 of 75

How should a client react to `429 Too Many Requests` with a `Retry-After` header?

✓Correct answer: Wait at least the indicated time before retrying, instead of retrying immediately
2Retry immediately in a loop
3Treat it as a permanent error

Explanation

Respecting Retry-After (and backoff) avoids making the overload worse. The UI can show a short "try again" message.

Further reading

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