Debug the Intermittent Bug
Diagnose an intermittent failure by collecting conditions, increasing observability, and testing one timing hypothesis.
Flaky async path A sync job fails once every 200 runs. Console logging changes the timing. CI sees it more often than laptops. The challenge is to make invisible conditions visible without changing too many of them at once. Condition search Rare failure -> condition capture -> targeted timing test For intermittent bugs, the reproducible case may be a precise combination of delay, order, data age, and worker state. Shortcut Rerun until it fails and then guess. The failure moves from rare rumor to repeatable timing case. Flaky is not a cause. It is a clue that your current case…
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