Java: Message Brokers (Kafka)

Correlation IDs track requests across multiple services, aiding in monitoring and debugging.

In microservices, requests often pass through many services. Distributed tracing with Correlation IDs involves adding a unique identifier to each request, allowing logs from different services to be correlated. This is crucial for diagnosing issues and understanding service interactions. For an e-commerce checkout process, a Correlation ID can trace a request from the front-end, through payment processing, to order fulfillment, providing a complete view of the transaction flow.