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Connection leaks cause pool exhaustion, which causes request timeouts, which causes cascading failures. They're subtle because the connection appears to be in use — it's just never returned. Here is how they form and how to find them before they take down a service.
Read moreRabbitMQ and Kafka both move messages between services, but they solve different problems. RabbitMQ routes messages to consumers. Kafka retains an ordered log that consumers read at their own pace. The choice determines your system's capabilities and constraints.
Read moreAPI documentation that drifts from the implementation is worse than no documentation — it misleads integrators and wastes time. Here is how to generate accurate OpenAPI specs from Spring Boot code, keep them in sync, and host them effectively.
Read moreRate limiting protects APIs from abuse, enforces fair usage, and prevents accidental runaway clients from taking down infrastructure. Here is how to implement per-user, per-IP, and per-endpoint rate limiting in Spring Boot with Bucket4j and Redis.
Read moreAuthentication and authorization are necessary but not sufficient for API security. Mass assignment, excessive data exposure, injection vulnerabilities, and missing security headers are the gaps that survive code review and appear in penetration tests.
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