When calling Chat API of QBusiness, got ThrottlingException

Implement an exponential backoff strategy with jitter to handle retries. This means you wait progressively longer periods between retries, with some random variation to avoid a "thundering herd" problem where many clients retry simultaneously. For example, you might wait 1 second, then 2 seconds, then 4 seconds, then 8 seconds, etc., with some randomness added to these times.

Monitor and optimize your API usage to stay within rate limits.

If the problem persists, wait for a reasonable period and retry, or contact QBusiness support for further assistance.