Distributed Systems Pattern: Idempotent Receiver
fetched at January 26, 2021

Clients send requests to servers but might not get a response. It's impossible for clients to know if the response was lost or the server crashed before processing the request. To make sure that the request is processed, the client has to re-send the request. If the server had already processed the request and crashed after that, servers will get duplicate requests when the client retries.


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