The post presents an example application demonstrating how to implement the circuit breaker pattern using AWS Lambda extensions and Amazon DynamoDB, providing a decoupled and reusable way to detect and isolate failures in distributed systems, preventing cascading failures and improving overall system stability.

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<p>This article explains how to implement the circuit breaker pattern with AWS Lambda extensions and Amazon DynamoDB to mitigate cascading failures in distributed systems.</p>
<p>Specifically, the article covers:</p>
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<li>Using Lambda extensions to implement the circuit breaker pattern by having an external process check service reachability and maintain circuit state in a caching layer</li>
<li>Architectural overview of the solution, involving Lambda functions, DynamoDB, EventBridge, and API Gateway</li>
<li>Step-by-step walkthrough of deploying and testing the solution using AWS SAM</li>
<li>Simulating a closed circuit breaker state to test the behavior when a microservice is unresponsive</li>
<li>Cleanup steps and security considerations</li>
</ul>
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