Why Incident Reviews Cannot Reconstruct the Scene
The Incomplete Picture Before the Morning Meeting
Twenty minutes before the morning meeting, operations lead Xiao Zhou is put on the spot.
After yesterday afternoon's release, the payment callback service jittered for more than ten minutes. The incident has recovered, and the business team has confirmed that transaction compensation is complete. But the review materials still cannot form one complete picture.
The monitoring engineer provides an interface latency curve.
The developer shares several error logs with request IDs.
CMDB can show relationships among payment callbacks, cache, database, and the downstream accounting service.
The alert list also has trigger, acknowledgment, and recovery timestamps.
The materials look complete. Then the review host asks one question:
"Which point became abnormal first? Was the impact limited to one instance, one service chain, or the entire payment path?"
The room goes quiet for a few seconds.
It is not that nobody has data. Everyone only has one fragment. Xiao Zhou can explain any one screenshot, but it is hard to connect all screenshots into one continuous scene.
That is the most frustrating part of many incident reviews: the evidence is there, but the scene is not.