Unverified50% confidenceSolutionExact time
An idempotent cache layer should implement an atomic "lock and set" mechanism: when a new key arrives, atomically write a PROCESSING placeholder record and set a short TTL lock, and subsequent identical requests return 409 Conflict or hang waiting.
1
Sources
50%
Confidence
Long-term
Relevance
10/19/2026
First Seen
Sources
Related Entities
Related Claims
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