pinpoint-apm/pinpoint
Oct 2024 – May 2026
20 Months active
Languages Used
JavaPropertiesMarkdownYAMLpropertiesXMLNoneprotobuf
Technical Skills
APMConfiguration ManagementJavaJava DevelopmentLoggingPlugin Development
jaehong.kim
PROFILE
Jaehong.kim
Over 20 months, contributed to pinpoint-apm/pinpoint by building and enhancing distributed tracing, observability, and plugin instrumentation for cloud-native Java applications. Developed features such as OpenTelemetry integration, advanced tracing for Kafka, gRPC, and HTTP stacks, and expanded support for modern runtimes like Jetty 12 and Spring Boot 3.5.x. Applied Java, Spring Framework, and asynchronous programming to deliver robust agent instrumentation, plugin development, and backend improvements. Addressed reliability through iterative bug fixes, dependency upgrades, and test automation, resulting in improved trace fidelity, system stability, and easier integration with evolving ecosystems. Work emphasized maintainability, compatibility, and actionable telemetry for production environments.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
138Total
Bugs
18
Commits
138
Features
54
Lines of code
46,107
Activity Months20
Your Network
53 peopleSame Organization
@navercorp.com33
Work History
May 2026
7 Commits • 2 Features
May 1, 2026May 2026 highlights for pinpoint-apm/pinpoint: Delivered major OpenTelemetry integration and observability enhancements, added Jetty 12 plugin, and fixed a CallTree overflow bug. These changes significantly improve end-to-end trace visibility, stability for deep traces, and platform coverage, driving faster diagnostics and stronger support for modern runtimes.
7 Commits • 2 Features
May 1, 2026May 2026 highlights for pinpoint-apm/pinpoint: Delivered major OpenTelemetry integration and observability enhancements, added Jetty 12 plugin, and fixed a CallTree overflow bug. These changes significantly improve end-to-end trace visibility, stability for deep traces, and platform coverage, driving faster diagnostics and stronger support for modern runtimes.
May 2026
April 2026
18 Commits • 3 Features
Apr 1, 2026Month: 2026-04. Focused on advancing OpenTelemetry tracing integration, interceptor/plugin reliability, and database monitoring coverage. Delivered substantial tracing core/collector enhancements, improved data quality, and expanded platform observability with a new Db2 plugin. Implemented new HTTP module and trace data controller, OTLP attribute improvements, and metadata endpoints; added dynamic span naming, agent identification, and enhanced call-tree/service-name validation with a ASM 9.9.1 upgrade and updated gRPC IDL. Also stabilized interceptor behavior and fixed key issues impacting trace mapping and call-tree integrity. Overall, improved end-to-end tracing fidelity, data consistency, and DB2 observability for Pinpoint APM.
April 2026
18 Commits • 3 Features
Apr 1, 2026Month: 2026-04. Focused on advancing OpenTelemetry tracing integration, interceptor/plugin reliability, and database monitoring coverage. Delivered substantial tracing core/collector enhancements, improved data quality, and expanded platform observability with a new Db2 plugin. Implemented new HTTP module and trace data controller, OTLP attribute improvements, and metadata endpoints; added dynamic span naming, agent identification, and enhanced call-tree/service-name validation with a ASM 9.9.1 upgrade and updated gRPC IDL. Also stabilized interceptor behavior and fixed key issues impacting trace mapping and call-tree integrity. Overall, improved end-to-end tracing fidelity, data consistency, and DB2 observability for Pinpoint APM.
March 2026
7 Commits • 5 Features
Mar 1, 2026March 2026 (pinpoint-apm/pinpoint) — Delivered measurable improvements in tracing fidelity, visualization, and configuration clarity across critical components. The work enhanced observability, reduced unnecessary span events, and fortified the tracing pipeline for production workloads, translating into faster issue localization and more actionable performance insights for customers and internal teams.
7 Commits • 5 Features
Mar 1, 2026March 2026 (pinpoint-apm/pinpoint) — Delivered measurable improvements in tracing fidelity, visualization, and configuration clarity across critical components. The work enhanced observability, reduced unnecessary span events, and fortified the tracing pipeline for production workloads, translating into faster issue localization and more actionable performance insights for customers and internal teams.
March 2026
February 2026
7 Commits • 3 Features
Feb 1, 2026February 2026—Key deliverables across pinpoint-apm/pinpoint: (1) OpenTelemetry Telemetry Core Enhancements and Configuration; (2) OTLP Trace Processing Enhancements and Error Handling; (3) HTTP Stack Updates and Spring Boot 3.5.x Compatibility. Major bugs fixed include more robust error reporting for span mapping and insertion, handling of rejected spans, and Undertow plugin adjustments to support Spring Boot 3.5.x. Overall impact: improved observability reliability and tracing accuracy, clearer error visibility, and a smoother upgrade path for Spring Boot 3.5.x environments, enabling faster incident resolution and better service observability. Technologies demonstrated: OpenTelemetry integration, OTLP processing, enhanced error handling, Undertow/HTTP 5.6 compatibility, Java instrumentation, and Spring Boot ecosystem interoperability.
February 2026
7 Commits • 3 Features
Feb 1, 2026February 2026—Key deliverables across pinpoint-apm/pinpoint: (1) OpenTelemetry Telemetry Core Enhancements and Configuration; (2) OTLP Trace Processing Enhancements and Error Handling; (3) HTTP Stack Updates and Spring Boot 3.5.x Compatibility. Major bugs fixed include more robust error reporting for span mapping and insertion, handling of rejected spans, and Undertow plugin adjustments to support Spring Boot 3.5.x. Overall impact: improved observability reliability and tracing accuracy, clearer error visibility, and a smoother upgrade path for Spring Boot 3.5.x environments, enabling faster incident resolution and better service observability. Technologies demonstrated: OpenTelemetry integration, OTLP processing, enhanced error handling, Undertow/HTTP 5.6 compatibility, Java instrumentation, and Spring Boot ecosystem interoperability.
January 2026
9 Commits • 2 Features
Jan 1, 2026January 2026: Pinpoint APM delivered OpenTelemetry integration for metrics and traces, expanded agent instrumentation, and improved compatibility including trace ID handling. The work enhances observability, broadens ecosystem compatibility, and lays groundwork for easier integration with OpenTelemetry tooling across services.
9 Commits • 2 Features
Jan 1, 2026January 2026: Pinpoint APM delivered OpenTelemetry integration for metrics and traces, expanded agent instrumentation, and improved compatibility including trace ID handling. The work enhances observability, broadens ecosystem compatibility, and lays groundwork for easier integration with OpenTelemetry tooling across services.
January 2026
December 2025
4 Commits • 3 Features
Dec 1, 2025December 2025 (pinpoint-apm/pinpoint) delivered three OpenTelemetry-related features alongside testing enhancements that strengthen observability, distributed tracing readiness, and test stability. The work focuses on business value such as improved compatibility, better tracing capabilities, and more reliable QA, enabling safer production rollouts and faster issue resolution.
December 2025
4 Commits • 3 Features
Dec 1, 2025December 2025 (pinpoint-apm/pinpoint) delivered three OpenTelemetry-related features alongside testing enhancements that strengthen observability, distributed tracing readiness, and test stability. The work focuses on business value such as improved compatibility, better tracing capabilities, and more reliable QA, enabling safer production rollouts and faster issue resolution.
November 2025
2 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for pinpoint-apm/pinpoint focusing on dependency stability, build health, and maintainability. Two small but impactful changes delivered: an ASM library upgrade to address improvements and bug fixes, and a refinement of dependency management for lettuce-core to simplify future upgrades.
2 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for pinpoint-apm/pinpoint focusing on dependency stability, build health, and maintainability. Two small but impactful changes delivered: an ASM library upgrade to address improvements and bug fixes, and a refinement of dependency management for lettuce-core to simplify future upgrades.
November 2025
October 2025
2 Commits • 2 Features
Oct 1, 2025In 2025-10, pinpoint-apm/pinpoint delivered two critical library upgrades to improve stability and future-proof compatibility. The HBase client library was upgraded from 2.5.11-hadoop3 to 2.5.12-hadoop3, delivering upstream bug fixes and performance improvements with no functional changes. The MongoDB agent plugin was updated to support driver 5.6, including transformations for ReadOperation and WriteOperation to accommodate the driver changes and an adjustment to the MongoClientImpl constructor for compatibility. No standalone bugs were recorded in this period; the changes focus on stability, regression reduction, and maintainability of the telemetry pipeline. Technologies/skills demonstrated include Java dependency management, upstream library upgrades, plugin development, and MongoDB/Mongo driver compatibility work. Business value delivered includes improved runtime stability, reduced risk of regressions with newer drivers, and a smoother upgrade path for future releases.
October 2025
2 Commits • 2 Features
Oct 1, 2025In 2025-10, pinpoint-apm/pinpoint delivered two critical library upgrades to improve stability and future-proof compatibility. The HBase client library was upgraded from 2.5.11-hadoop3 to 2.5.12-hadoop3, delivering upstream bug fixes and performance improvements with no functional changes. The MongoDB agent plugin was updated to support driver 5.6, including transformations for ReadOperation and WriteOperation to accommodate the driver changes and an adjustment to the MongoClientImpl constructor for compatibility. No standalone bugs were recorded in this period; the changes focus on stability, regression reduction, and maintainability of the telemetry pipeline. Technologies/skills demonstrated include Java dependency management, upstream library upgrades, plugin development, and MongoDB/Mongo driver compatibility work. Business value delivered includes improved runtime stability, reduced risk of regressions with newer drivers, and a smoother upgrade path for future releases.
September 2025
9 Commits • 2 Features
Sep 1, 2025September 2025 performance summary for pinpoint-apm/pinpoint. Delivered targeted feature improvements in interceptor handling and reactive ecosystems while stabilizing dependencies and expanding test coverage. Key refactors and compatibility work enhanced bootstrap reliability, cross-module integration, and observability, supporting broader production scenarios and reduced runtime risk.
9 Commits • 2 Features
Sep 1, 2025September 2025 performance summary for pinpoint-apm/pinpoint. Delivered targeted feature improvements in interceptor handling and reactive ecosystems while stabilizing dependencies and expanding test coverage. Key refactors and compatibility work enhanced bootstrap reliability, cross-module integration, and observability, supporting broader production scenarios and reduced runtime risk.
September 2025
August 2025
12 Commits • 3 Features
Aug 1, 2025Month: 2025-08. Focused on observability improvements, robustness, and test/maintenance for pinpoint. Delivered core tracing enhancements, reliability fixes, and ongoing dependency maintenance to strengthen end-to-end telemetry and CI validation.
August 2025
12 Commits • 3 Features
Aug 1, 2025Month: 2025-08. Focused on observability improvements, robustness, and test/maintenance for pinpoint. Delivered core tracing enhancements, reliability fixes, and ongoing dependency maintenance to strengthen end-to-end telemetry and CI validation.
July 2025
10 Commits • 4 Features
Jul 1, 20252025-07 monthly summary for pinpoint-apm/pinpoint: Delivered observable enhancements and reliability improvements across transaction tracing, application map rendering, data integrity, and test stability. Implemented API and visualization improvements, hardened AWS header handling, extended Kafka configurability, and stabilized CI/test suites. These changes improved end-to-end observability, deployment resilience, and developer productivity for cloud-native tracing and APM workflows.
10 Commits • 4 Features
Jul 1, 20252025-07 monthly summary for pinpoint-apm/pinpoint: Delivered observable enhancements and reliability improvements across transaction tracing, application map rendering, data integrity, and test stability. Implemented API and visualization improvements, hardened AWS header handling, extended Kafka configurability, and stabilized CI/test suites. These changes improved end-to-end observability, deployment resilience, and developer productivity for cloud-native tracing and APM workflows.
July 2025
June 2025
9 Commits • 5 Features
Jun 1, 2025June 2025 performance summary for pinpoint-apm/pinpoint: Delivered a set of feature enhancements and reliability fixes across data collection, tracing, system isolation, Reactor-based async flows, UI robustness, and Kafka logging. The work improved data granularity and observability, hardened agent isolation to avoid property interference, extended async tracing capabilities, and strengthened UI correctness and logging fidelity, translating to clearer insights for customers and reduced debugging effort for engineers.
June 2025
9 Commits • 5 Features
Jun 1, 2025June 2025 performance summary for pinpoint-apm/pinpoint: Delivered a set of feature enhancements and reliability fixes across data collection, tracing, system isolation, Reactor-based async flows, UI robustness, and Kafka logging. The work improved data granularity and observability, hardened agent isolation to avoid property interference, extended async tracing capabilities, and strengthened UI correctness and logging fidelity, translating to clearer insights for customers and reduced debugging effort for engineers.
May 2025
4 Commits • 1 Features
May 1, 2025Month: 2025-05 - Focused on strengthening observability, reliability, and efficiency of the Pinpoint APM suite. Delivered a new AWS SDK v2 S3 tracing plugin with Pinpoint integration to provide end-to-end visibility for S3 requests (sync/async), refactored tracing logic for robustness, and adjusted error-marking defaults to reduce false positives. Addressed stability in the Elasticsearch plugin by preventing NullPointerExceptions through defensive checks and code/log cleanup. These changes enhance operational insight, reduce incident noise, and improve production reliability, delivering tangible business value through faster diagnosis and more reliable monitoring.
4 Commits • 1 Features
May 1, 2025Month: 2025-05 - Focused on strengthening observability, reliability, and efficiency of the Pinpoint APM suite. Delivered a new AWS SDK v2 S3 tracing plugin with Pinpoint integration to provide end-to-end visibility for S3 requests (sync/async), refactored tracing logic for robustness, and adjusted error-marking defaults to reduce false positives. Addressed stability in the Elasticsearch plugin by preventing NullPointerExceptions through defensive checks and code/log cleanup. These changes enhance operational insight, reduce incident noise, and improve production reliability, delivering tangible business value through faster diagnosis and more reliable monitoring.
May 2025
April 2025
13 Commits • 5 Features
Apr 1, 2025April 2025 highlights: Delivered end-to-end streaming observability and compatibility improvements for pinpoint-apm/pinpoint, focusing on streaming pipelines, tracing and governance improvements. Key outcomes include: end-to-end tracing for a Kafka Streams pipeline, upgraded HTTP client tracing, Kafka 4.x compatibility with enhanced stream processing, clearer CallTree visualizations, and automated commit message validation with contributor guidelines. These changes reduce mean time to diagnose, improve streaming reliability, and raise code quality and governance standards.
April 2025
13 Commits • 5 Features
Apr 1, 2025April 2025 highlights: Delivered end-to-end streaming observability and compatibility improvements for pinpoint-apm/pinpoint, focusing on streaming pipelines, tracing and governance improvements. Key outcomes include: end-to-end tracing for a Kafka Streams pipeline, upgraded HTTP client tracing, Kafka 4.x compatibility with enhanced stream processing, clearer CallTree visualizations, and automated commit message validation with contributor guidelines. These changes reduce mean time to diagnose, improve streaming reliability, and raise code quality and governance standards.
March 2025
12 Commits • 6 Features
Mar 1, 2025March 2025 highlights a broad set of observability, performance, and reliability improvements across pinpoint. Key features include Trace Block and Reactor tracing enhancements for asynchronous/reactive paths; Kafka plugin test infrastructure and ListenerConsumer entry point support; a high-performance ByteArrayUtils/VarHandle-based primitive serialization path; enhanced log management and dynamic logging documentation; and an ASM dependency upgrade. A critical bug fix addressed NoClassDefFoundError for java.sql.Date in Spring Data R2DBC parameter handling. Overall, these changes improve tracing clarity, testing coverage, serialization throughput, deployment stability, and developer experience.
12 Commits • 6 Features
Mar 1, 2025March 2025 highlights a broad set of observability, performance, and reliability improvements across pinpoint. Key features include Trace Block and Reactor tracing enhancements for asynchronous/reactive paths; Kafka plugin test infrastructure and ListenerConsumer entry point support; a high-performance ByteArrayUtils/VarHandle-based primitive serialization path; enhanced log management and dynamic logging documentation; and an ASM dependency upgrade. A critical bug fix addressed NoClassDefFoundError for java.sql.Date in Spring Data R2DBC parameter handling. Overall, these changes improve tracing clarity, testing coverage, serialization throughput, deployment stability, and developer experience.
March 2025
February 2025
6 Commits • 4 Features
Feb 1, 2025February 2025: Focused on strengthening observability and reliability across the Pinpoint stack, delivering deterministic instrumentation, clearer API-call visualization, and updated driver compatibility to minimize production issues. Highlights include deterministic instrumentation order, new API call visualization in Plugin Verifier, Reactor async-context propagation improvements, ClickHouse plugin compatibility with driver 0.8.0, and enhanced Redis Pub/Sub tracing for Lettuce. These efforts improve trace accuracy, debugging efficiency, and vendor interoperability, delivering measurable business value through faster root-cause analysis and fewer runtime errors.
February 2025
6 Commits • 4 Features
Feb 1, 2025February 2025: Focused on strengthening observability and reliability across the Pinpoint stack, delivering deterministic instrumentation, clearer API-call visualization, and updated driver compatibility to minimize production issues. Highlights include deterministic instrumentation order, new API call visualization in Plugin Verifier, Reactor async-context propagation improvements, ClickHouse plugin compatibility with driver 0.8.0, and enhanced Redis Pub/Sub tracing for Lettuce. These efforts improve trace accuracy, debugging efficiency, and vendor interoperability, delivering measurable business value through faster root-cause analysis and fewer runtime errors.
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 milestone for pinpoint-apm/pinpoint focused on delivering observability and compatibility enhancements across core data integration plugins, strengthening end-to-end monitoring and resilience in modern data pipelines. The team implemented targeted upgrades to support current technology stacks and improved tracing granularity, enabling faster issue diagnosis and more reliable performance in production.
3 Commits • 1 Features
Jan 1, 2025January 2025 milestone for pinpoint-apm/pinpoint focused on delivering observability and compatibility enhancements across core data integration plugins, strengthening end-to-end monitoring and resilience in modern data pipelines. The team implemented targeted upgrades to support current technology stacks and improved tracing granularity, enabling faster issue diagnosis and more reliable performance in production.
January 2025
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for pinpoint repository focusing on business value and technical achievements in the reactor-plugin area.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for pinpoint repository focusing on business value and technical achievements in the reactor-plugin area.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for pinpoint (pinpoint-apm/pinpoint). Focused on delivering an enhanced Real IP resolution flow to accurately determine the client IP behind proxies/load balancers. Implemented Flexible Real IP Header Resolution by allowing RealIpHeaderResolver to use a comma-separated list of header names, updating parsing and iteration logic, and expanding tests and inline documentation. The changes align with supporting diverse network topologies and improve security/observability by providing reliable client IP attribution.
1 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for pinpoint (pinpoint-apm/pinpoint). Focused on delivering an enhanced Real IP resolution flow to accurately determine the client IP behind proxies/load balancers. Implemented Flexible Real IP Header Resolution by allowing RealIpHeaderResolver to use a comma-separated list of header names, updating parsing and iteration logic, and expanding tests and inline documentation. The changes align with supporting diverse network topologies and improve security/observability by providing reliable client IP attribution.
November 2024
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024 (pinpoint-apm/pinpoint): Delivered a configurable error marking option for HTTP client plugins and cleaned VertxPlugin logging to reduce noise. These changes enhance observability, troubleshooting, and maintainability while preserving existing behavior.
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024 (pinpoint-apm/pinpoint): Delivered a configurable error marking option for HTTP client plugins and cleaned VertxPlugin logging to reduce noise. These changes enhance observability, troubleshooting, and maintainability while preserving existing behavior.
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Quality Metrics
Correctness88.2%
Maintainability86.4%
Architecture85.4%
Performance79.4%
AI Usage22.0%
Skills & Technologies
Programming Languages
JavaMarkdownNonePropertiesTypeScriptXMLYAMLpropertiesprotobuf
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI developmentAPMAPM (Application Performance Management)APM (Application Performance Monitoring)AWS SDKAgent DevelopmentAnnotation ProcessingAspect-Oriented ProgrammingAsynchronous ProgrammingBackend DevelopmentBuild System ConfigurationBytecode Instrumentation
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