The server rendered the page and the browser threw it away
A React #418 error only visible to visitors outside mainland Spain. Server and browser wrote the same date with clocks in different time zones, so React repainted the entire page.
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The timeout was set. The machine still hit 96 °C
Eight Apache workers spinning at 100% CPU for three and a half hours, with three safeguards in place and not one of them firing. A client timeout cuts the connection, not the work.
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A site lost 98% of its Google traffic overnight
Crawling was healthy, every page answered correctly, and Google still decided to stop sending anyone. Telling "Google cannot get in" apart from "Google gets in and decides you are not worth it" changed the whole plan.
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The batch job that said "complete" after reading 21% of the data
Exit code zero, green logs, and half a catalogue missing. The most expensive failure in a batch job is not the crash: it is the run that reports success on partial data.
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