Debugging a Production Bug I Cannot Reproduce Locally
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Reconstruct the timeline from prod logs before touching code Bisect by deploy to find the exact commit that broke Add targeted instrumentation, test one hypothesis at a time Verify the fix in the real environment, not localhost A checkout endpoint failed for 3 percent of orders. It worked every time on my machine. I fixed it in 90 minutes using a five-step process I now run every time prod breaks and localhost stays green. Here is the exact method, with the real numbers from that bug. Step One:…
1Key Takeaways
- Reconstruct the timeline from prod logs before touching code Bisect by deploy to find the exact commit that broke Add targeted instrumentation, test one hypothesis at a time Verify the fix in the real environment, not localhost A checkout endpoint failed for 3 percent of orders.
- I fixed it in 90 minutes using a five-step process I now run every time prod breaks and localhost stays green.
- Here is the exact method, with the real numbers from that bug.
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — AI reports that reconstruct the timeline from prod logs before touching code Bisect by deploy to find the exact commit that broke Add targeted instrumentation, test one hypothesis at a time Verify the fix in the real environment, not localhost A checkout endpoint failed for 3 percent of orders.
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