Apply 5 Whys to a duplicate webhook incident and land on an idempotency control.
A payment-succeeded webhook was delivered twice and the subscription system granted two credits. 5 Whys: keep asking why until the process control is visible. The novice move is to blame the payment provider for retrying. Many providers intentionally deliver webhooks more than once, so the receiver must be idempotent. Why 1 Why did the customer get two credits? Fulfillment ran twice for the same successful payment. Start with the visible business effect, not a generic system label. Why 2 Why did fulfillment run twice? The webhook handler treated each delivery as a new event. This connects the duplicate outcome to…
Sign up free — one personalized lesson every day, matched to your role and goals.
Already have an account? Sign in