Spring Office Hours: S5E17 - Spring Boot 4.1 with Phil Webb

Spring Boot 4.1 introduces several significant features including native gRPC support with auto-configuration, enhanced OpenTelemetry with async context propagation, configurable Log4j file rotation strategies (size, time, size+time, cron), and SSRF mitigation through InetAddressFilter. The release emphasizes a security-first approach, prioritizing security fixes over new features, which is described as 'legendarily rare' in open source projects. The release also includes improved release notes structure, milestone distribution to Maven Central for enterprise testing, and enhanced documentation for easier upgrades. The Spring Boot team, with approximately 20,000 contributors across 68 projects in the release train, continues to balance AI tool adoption with human expertise, encouraging developers to use AI as a tool while maintaining critical thinking and understanding of their code.