AWS Certified Developer Associate DVA-C02 Practice Question
A developer is implementing client-side retries for transient HTTP 5xx errors between microservices. To minimize the risk of a synchronized "retry storm" while still giving the system time to recover, which retry strategy is recommended by AWS best practices?
Exponential backoff combined with jitter
Linear backoff (increase the delay by a fixed amount each time)
Exponential backoff spaces out successive retries, but if many clients fail at the same time they will back off and retry in lock-step, creating another surge of traffic. Adding jitter-randomizing each client's computed backoff-spreads the retries over time, dramatically reducing correlated load spikes. AWS Well-Architected Reliability Pillar REL05-BP03 and the Amazon Builders' Library article "Timeouts, retries, and backoff with jitter" both recommend combining exponential backoff with jitter for this reason.
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AWS Certified Developer Associate DVA-C02
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