I Shipped a Bug to Production That Cost Us 3 Hours of Downtime
A recent deployment caused three hours of downtime due to a bug introduced by a minor code refactor. The issue stemmed from a race condition that only occurred under concurrent load, which was not accounted for during testing. The incident highlighted several mistakes in the testing process and led to changes in the staging environment to better simulate production conditions.
- ▪The bug was caused by a race condition that appeared under concurrent load, which was not tested.
- ▪The deployment led to inaccurate inventory counts and required three hours to resolve.
- ▪The team has since adjusted their staging environment to match the production worker count for better testing.
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