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Idempotency is easy until the second request is different

by Dochia blog.dochia.dev published 2026-05-07

Idempotency is not just an HTTP header or a key lookup. This article covers the failure cases that bite real APIs: different requests with the same key, concurrent retries, partial success, downstream uncertainty, response replay, expiry, and duplicate message handling.
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Software EngineeringSystems & Performance2026

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May 7, 2026Idempotency is easy until the second request is different by ludovicianul335218

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