The first rule of distributed systems is 'Don’t distribute your system'. Designing distributed systems right is infamously hard for multiple reasons.   The idempotency concept   For example, a call to a function can succeed or fail in non-distributed systems. Once you move the called function to a remote component, a third option appears: you call the remote function but get no response from the component. At this point, it’s impossible to know whether the call reached the component o

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A Java geek

Learn about the idempotency concept in distributed systems and how it relates to HTTP APIs. Discover the purpose of the Idempotency-Key HTTP header.

Fixing duplicate API requests