Worked on the micrometer-metrics/micrometer repository, focusing on enhancing the reliability of Jetty connection metrics. Addressed a critical race condition by synchronizing access to connectionSamples, ensuring accurate real-time reporting of current connections. Improved performance by relocating the maxConnections update outside the critical section, which reduced contention and increased metric update efficiency. These changes strengthened the stability and operational visibility of metrics, supporting more accurate dashboards and alerting for scaling decisions. The work centered on concurrency and performance optimizations using Java, with a strong emphasis on metrics instrumentation. No new features were introduced, as efforts prioritized bug resolution and system robustness.