apache/paimon
Dec 2024 – Apr 2026
14 Months active
Languages Used
JavaYAMLPythonScalaXMLMarkdown
Technical Skills
Catalog ManagementHivePerformance OptimizationTestingBackend DevelopmentCaching
XiaoHongbo
PROFILE
Xiaohongbo
Over 14 months, contributed to the apache/paimon repository by building and refining backend systems for scalable data management and RESTful API services. Focused on robust API design and implementation in Java and Python, delivering features such as paginated catalog listings, external table support, and cross-language data handling with Ray and Lance integration. Enhanced reliability through targeted bug fixes, improved caching, and comprehensive test coverage, while optimizing file I/O and partition management for large datasets. Maintained clear documentation and OpenAPI specifications, enabling efficient onboarding and integration. The work emphasized data integrity, performance, and maintainability across distributed systems and evolving data schemas.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
97Total
Bugs
25
Commits
97
Features
41
Lines of code
30,339
Activity Months14
Your Network
183 peopleWork History
April 2026
5 Commits • 1 Features
Apr 1, 2026Month: 2026-04 — Apache Paimon monthly summary: Delivered REST API enhancements and comprehensive function management; stabilized large-dataset file rollout; improved reliability, scalability, and developer experience. Key features include REST endpoints for creating, altering, and retrieving functions, encoding fixes for query parameters to prevent 401 authorization failures, and a more realistic REST server mock. Major bugs fixed include preventing stack overflow during large-file rolling and resolving rolling conflicts when update_by_arrow_with_row_id is active. Overall impact: higher API reliability, safer and more scalable data processing, and stronger support for PyPaimon REST function API. Technologies demonstrated: Python backend, REST API design, mock server development, and data processing optimization.
5 Commits • 1 Features
Apr 1, 2026Month: 2026-04 — Apache Paimon monthly summary: Delivered REST API enhancements and comprehensive function management; stabilized large-dataset file rollout; improved reliability, scalability, and developer experience. Key features include REST endpoints for creating, altering, and retrieving functions, encoding fixes for query parameters to prevent 401 authorization failures, and a more realistic REST server mock. Major bugs fixed include preventing stack overflow during large-file rolling and resolving rolling conflicts when update_by_arrow_with_row_id is active. Overall impact: higher API reliability, safer and more scalable data processing, and stronger support for PyPaimon REST function API. Technologies demonstrated: Python backend, REST API design, mock server development, and data processing optimization.
April 2026
March 2026
14 Commits • 8 Features
Mar 1, 2026March 2026 monthly summary for apache/paimon focusing on delivering business value through feature improvements, robustness, and cross-format compatibility. Key outcomes include reliable data reading, scalable writing, reduced memory footprints, and stronger data governance.
March 2026
14 Commits • 8 Features
Mar 1, 2026March 2026 monthly summary for apache/paimon focusing on delivering business value through feature improvements, robustness, and cross-format compatibility. Key outcomes include reliable data reading, scalable writing, reduced memory footprints, and stronger data governance.
February 2026
15 Commits • 4 Features
Feb 1, 2026February 2026 (Month: 2026-02) – Consolidated the REST catalog and data evolution capabilities with a focus on reliability, performance, and data integrity. Delivered user-facing features, improved batch processing, and strengthened commit reliability. Key work included partition drop in REST catalog, ROW_ID-based data evolution filtering, data evolution robustness improvements, and committed quality via internal improvements and logging. The work enhances data governance, reduces operational risk, and accelerates data workflows.
15 Commits • 4 Features
Feb 1, 2026February 2026 (Month: 2026-02) – Consolidated the REST catalog and data evolution capabilities with a focus on reliability, performance, and data integrity. Delivered user-facing features, improved batch processing, and strengthened commit reliability. Key work included partition drop in REST catalog, ROW_ID-based data evolution filtering, data evolution robustness improvements, and committed quality via internal improvements and logging. The work enhances data governance, reduces operational risk, and accelerates data workflows.
February 2026
January 2026
24 Commits • 11 Features
Jan 1, 2026January 2026: Delivered high-impact Python and data I/O enhancements that improve reliability, scalability, and ease of use. The work focused on tighter integration with Ray Data, online schema evolution, robust REST interactions, and a more flexible data I/O stack. These changes reduce operational toil and enable faster, safer feature delivery across the Apache Paimon project.
January 2026
24 Commits • 11 Features
Jan 1, 2026January 2026: Delivered high-impact Python and data I/O enhancements that improve reliability, scalability, and ease of use. The work focused on tighter integration with Ray Data, online schema evolution, robust REST interactions, and a more flexible data I/O stack. These changes reduce operational toil and enable faster, safer feature delivery across the Apache Paimon project.
December 2025
14 Commits • 3 Features
Dec 1, 2025December 2025: Focused on cross-language interoperability, reliability, and governance — delivering Lance integration, Ray-backed data handling, and core stability improvements for Apache Paimon. End-to-end tests across Python/Java validated data handling; distributed processing gains were realized via Ray; and governance/performance enhancements improved data correctness and scalability.
14 Commits • 3 Features
Dec 1, 2025December 2025: Focused on cross-language interoperability, reliability, and governance — delivering Lance integration, Ray-backed data handling, and core stability improvements for Apache Paimon. End-to-end tests across Python/Java validated data handling; distributed processing gains were realized via Ray; and governance/performance enhancements improved data correctness and scalability.
December 2025
November 2025
8 Commits • 4 Features
Nov 1, 2025November 2025: Delivered core improvements across external data sources, blob data management, and partitioning capabilities, while strengthening reliability and compatibility. Focused on business value by enabling more flexible data ingestion, higher throughput, and scalable data layout, with robust validation, path handling, and configurable performance knobs.
November 2025
8 Commits • 4 Features
Nov 1, 2025November 2025: Delivered core improvements across external data sources, blob data management, and partitioning capabilities, while strengthening reliability and compatibility. Focused on business value by enabling more flexible data ingestion, higher throughput, and scalable data layout, with robust validation, path handling, and configurable performance knobs.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for the apache/paimon project highlighting key business and technical outcomes. Implemented External Tables Support in the REST catalog, enabling creation and management of external tables with specified paths. Updated catalog metadata handling to support external table operations and added test coverage to ensure correctness. No major bugs fixed this month; focus on expanding data source integration and governance capabilities across the REST interface.
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for the apache/paimon project highlighting key business and technical outcomes. Implemented External Tables Support in the REST catalog, enabling creation and management of external tables with specified paths. Updated catalog metadata handling to support external table operations and added test coverage to ensure correctness. No major bugs fixed this month; focus on expanding data source integration and governance capabilities across the REST interface.
October 2025
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 (apache/paimon): Delivered a targeted API documentation correctness improvement for the Catalog API, fixing a Javadoc typo and aligning parameter docs for listTablesPaged and listTableDetailsPaged with the actual method signatures. The change enhances API clarity and developer onboarding without changing runtime behavior.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 (apache/paimon): Delivered a targeted API documentation correctness improvement for the Catalog API, fixing a Javadoc typo and aligning parameter docs for listTablesPaged and listTableDetailsPaged with the actual method signatures. The change enhances API clarity and developer onboarding without changing runtime behavior.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025 — Apache Paimon (apache/paimon) delivered two major REST-related feature improvements with accompanying tests and API stability enhancements. Key changes: 1) Partition naming utility (PartitionUtils.buildPartitionName) and multi-level paged partition listing integrated into RESTCatalogServer, with new test testListPartitionsPagedWithMultiLevel. 2) REST API enhancement to return Identifier objects for global table/view listings, introducing ListTablesGloballyResponse and ListViewsGloballyResponse and aligning OpenAPI/specs. Minor internal stability improvement via hotfix to optimize return types (ListTablesGlobally & ListViewsGlobally). Impact: more robust and consistent API, easier client integration, better data representation for global listings, and improved support for multi-level partition queries.
2 Commits • 2 Features
Jun 1, 2025June 2025 — Apache Paimon (apache/paimon) delivered two major REST-related feature improvements with accompanying tests and API stability enhancements. Key changes: 1) Partition naming utility (PartitionUtils.buildPartitionName) and multi-level paged partition listing integrated into RESTCatalogServer, with new test testListPartitionsPagedWithMultiLevel. 2) REST API enhancement to return Identifier objects for global table/view listings, introducing ListTablesGloballyResponse and ListViewsGloballyResponse and aligning OpenAPI/specs. Minor internal stability improvement via hotfix to optimize return types (ListTablesGlobally & ListViewsGlobally). Impact: more robust and consistent API, easier client integration, better data representation for global listings, and improved support for multi-level partition queries.
June 2025
May 2025
2 Commits • 2 Features
May 1, 2025May 2025 performance highlights focused on expanding and refining the REST API surface for table/view summaries and aligning OpenAPI documentation. Delivered user-facing endpoints with improved search capabilities and ensured documentation accurately reflects current API structure, contributing to faster integration and reduced onboarding time for developers.
May 2025
2 Commits • 2 Features
May 1, 2025May 2025 performance highlights focused on expanding and refining the REST API surface for table/view summaries and aligning OpenAPI documentation. Delivered user-facing endpoints with improved search capabilities and ensured documentation accurately reflects current API structure, contributing to faster integration and reduced onboarding time for developers.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/paimon focused on stabilizing REST endpoints, improving test reliability, and enhancing list capabilities for better developer UX and scalability.
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/paimon focused on stabilizing REST endpoints, improving test reliability, and enhancing list capabilities for better developer UX and scalability.
April 2025
March 2025
6 Commits • 3 Features
Mar 1, 2025March 2025 (apache/paimon) – Delivered scalable REST Catalog enhancements with robust pagination and API lifecycle management. Implemented paged listing for REST Catalog entities (tables, views, partitions) via new PagedList and pagination-enabled interfaces, plus a stability fix to avoid dead loops. Extended paged databases listing with ListDatabasesPaged across AbstractCatalog/DelegateCatalog/RESTCatalog and nextPageToken support in ListDatabasesResponse. Expanded catalog REST API surface with OpenAPI definitions for create/list/get/alter/drop and a new get-by-ID endpoint, plus a catalog lifecycle status field (NEW/INITIALIZING/RUNNING/DELETING/DELETED). These changes enable efficient, scalable catalog queries, simpler integration for clients, and lifecycle-aware catalog management.
March 2025
6 Commits • 3 Features
Mar 1, 2025March 2025 (apache/paimon) – Delivered scalable REST Catalog enhancements with robust pagination and API lifecycle management. Implemented paged listing for REST Catalog entities (tables, views, partitions) via new PagedList and pagination-enabled interfaces, plus a stability fix to avoid dead loops. Extended paged databases listing with ListDatabasesPaged across AbstractCatalog/DelegateCatalog/RESTCatalog and nextPageToken support in ListDatabasesResponse. Expanded catalog REST API surface with OpenAPI definitions for create/list/get/alter/drop and a new get-by-ID endpoint, plus a catalog lifecycle status field (NEW/INITIALIZING/RUNNING/DELETING/DELETED). These changes enable efficient, scalable catalog queries, simpler integration for clients, and lifecycle-aware catalog management.
January 2025
1 Commits
Jan 1, 2025January 2025 monthly summary for apache/paimon highlights a focused effort on cache reliability in multi-database environments. Delivered a scoped table invalidation fix that confines invalidation to the relevant database, eliminating cross-database cache clears and improving table caching reliability. The change reduces stale reads and cache churn in deployments with identical table names across databases. This work is tracked through commit 4904d919e9a2ea1f49aaaccd0e265698d1a45cc4 and related to issue (#4895).
1 Commits
Jan 1, 2025January 2025 monthly summary for apache/paimon highlights a focused effort on cache reliability in multi-database environments. Delivered a scoped table invalidation fix that confines invalidation to the relevant database, eliminating cross-database cache clears and improving table caching reliability. The change reduces stale reads and cache churn in deployments with identical table names across databases. This work is tracked through commit 4904d919e9a2ea1f49aaaccd0e265698d1a45cc4 and related to issue (#4895).
January 2025
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for apache/paimon focusing on stabilizing Hive Catalog operations and improving test coverage. The key effort was addressing potential timeouts in Hive Catalog table listing by introducing batched retrieval in listTablesImpl, complemented by targeted tests to validate batching behavior across configurations.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for apache/paimon focusing on stabilizing Hive Catalog operations and improving test coverage. The key effort was addressing potential timeouts in Hive Catalog table listing by introducing batched retrieval in listTablesImpl, complemented by targeted tests to validate batching behavior across configurations.
Activity
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Quality Metrics
Correctness94.8%
Maintainability85.0%
Architecture87.2%
Performance84.6%
AI Usage22.4%
Skills & Technologies
Programming Languages
JavaMarkdownPythonScalaXMLYAML
Technical Skills
API DesignAPI DevelopmentAPI designAPI developmentAPI integrationAWS S3 integrationBackend DevelopmentBug FixingCI/CDCachingCatalog ManagementCode MaintenanceCode RefactoringConfiguration ManagementContinuous Integration
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