Demo: a replay that would have resent 40,000 emails, and the fix
On This Lesson 3 topics
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In this lesson
catch a dangerous replay before it hurts customers.
Draft outline details
Step by step
- Setup: a bug fix requires replaying ShipmentDispatched for a week.
- Inspect the notification consumer: it sends an email per event.
- Dry-run the replay in staging with a mail sink and show 40,000 captured messages.
- Planned mistake: rely on 'we will pause the mail provider' as the safeguard; fix with a replay flag and a sent-notifications table.
- Update the catalog: mark the consumer as side-effecting and document the replay procedure.
Prepares SRB-002-LAB1.
Practice
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