A real incident investigation starts the moment you find the ERROR line. The ERROR is the result — the cause is usually upstream. The WARN just above it, a timeout a few seconds earlier, a config load hundreds of lines back.

Source: [Dev.to](https://dev.to/_156a59a8566fe532e165/you-found-the-error-the-cause-is-in-the-lines-before-it-1ij2)

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