Month: 2026-01 — Apache Dubbo: concise monthly summary focused on stability and correctness improvements in metadata reporting. Key features delivered: - Stability improvements to metadata reporting by implementing correct equals and hashCode for metadata identifiers to prevent memory overflow in AbstractMetadataReport. - Formatting cleanup for metadata identifier code to improve readability and reduce future churn. Major bugs fixed: - Resolved memory overflow risk in AbstractMetadataReport by ensuring proper identity semantics for metadata identifiers. - Expanded test coverage to verify duplicates are properly deduplicated and to fix null-value issues in identifier handling. Overall impact and accomplishments: - Increased stability and reliability of metadata reporting under high-load scenarios; reduced memory pressure and potential outages. - Improved correctness of metadata deduplication and resilience to invalid/null identifiers, contributing to more predictable deployments. - Strengthened code quality with targeted refactoring and enhanced tests, facilitating easier maintenance and future enhancements. Technologies/skills demonstrated: - Java memory management, equals/hashCode contracts, and robust test-driven development (JUnit). - Code quality improvements (styling) and maintainability gains through targeted refactors. - Collaborative development (co-authored by heliang). Commit context: - Commit b7d52c39ac35527e331282945f3e8fe20fc0dd61: fix: AbstractMetadataReport MemoryOverflow (#15987); style: Format the metadata identifier code; test: Add identifiers to repeat test cases; test: Fixed the null value issue in the test cases.