Designing distributed systems right is infamously hard for multiple reasons. We need to describe the concept of *idempotence*: Idempotence is the property of certain operations in mathematics and computer science whereby they can be applied multiple times without changing the result beyond the initial application.
Nicolas Fränkel
@nfrankel
Developer Advocate for Apache APISIX *** Learner *** Author of http://leanpub.com/integrationtest