March 2026 monthly performance summary for OpenSearch development. Focused on delivering reliability improvements for context propagation and tracing, and ensuring state restoration preserves critical runtime information. Key features delivered and major fixes across two repositories are summarized below, highlighting business value and technical achievements. 1) Key features delivered - Transient ThreadContext header preservation during restore (OpenSearch repo): ensured transient ThreadContext headers with propagators survive restore, introduced methods to manage transient headers, and added tests to verify important context information is not lost during state restoration. Commit: e39a49606a15262366af703035a52d6ca670627c. 2) Major bugs fixed - Distributed Tracing Span Propagation Fix in Netty4HttpRequestHeaderVerifier (Security repo): corrected a span propagation issue in the tracing system, resulting in improved tracing capabilities and reliability. Commit: 05259272e0594801fd284c768189ef0c5d03ba28. 3) Overall impact and accomplishments - Improved observability and reliability across cluster restarts and request handling by preserving critical context and stabilizing tracing, reducing debugging time and enabling better operational insights. - Demonstrated strong cross-repo collaboration between the OpenSearch and Security teams to strengthen the distributed tracing surface area and context propagation. 4) Technologies/skills demonstrated - Java, ThreadContext management, propagators, and state restoration strategies. - Netty-based tracing integration and distributed tracing concepts. - Test-driven development with added tests to validate preservation of context and tracing behavior. - Code signing/off process evidenced by commit signatures.