Update nrc-retry-architecture.md - #137
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Grabauskas
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Aug 13, 2026
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| ## Subscription blocking | ||
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| Subscription blocking is a safeguard on top of the Hangfire retry mechanism described above. If every notification for a subscription keeps failing and none can be delivered for a full week, the subscription is automatically blocked. Once blocked, no further notifications (new or retried) are sent to that subscription's webhook receiver, which prevents the system from continuing to schedule and process retries for a client that is clearly no longer reachable. Unlike the circuit breaker, a block is not lifted automatically after a timeout — it requires a system administrator to manually unblock the subscription in ZCA under Notificaties before delivery resumes. |
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Mention that ZCA is only from our SaaS. In OSS version, you can only do it using database.
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