apache/druid
Oct 2024 – Feb 2026
17 Months active
Languages Used
JavaMarkdownTypeScriptSQLShellXMLPropertiesJSON
Technical Skills
Backend DevelopmentConfiguration ManagementDocumentationDistributed SystemsPerformance OptimizationAPI Design
Kashif Faraz
PROFILE
Kashif Faraz
Kashif Faraz engineered core backend and infrastructure features for the apache/druid repository, focusing on distributed systems reliability, performance, and testability. He delivered enhancements such as embedded testing frameworks, dynamic compaction APIs, and robust segment metadata caching, using Java and YAML for configuration and integration. His work modernized test infrastructure by migrating integration tests to embedded environments, improved data ingestion and concurrency with Kafka and multithreaded task management, and strengthened API security and observability. By refactoring legacy components and streamlining configuration management, Kashif improved maintainability and reduced operational risk, demonstrating depth in backend development, system design, and automated testing.
Overall Statistics
Feature vs Bugs
81%Features
Repository Contributions
120Total
Bugs
12
Commits
120
Features
51
Lines of code
101,338
Activity Months17
Your Network
61 peopleWork History
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 - Apache Druid: Focused on modernizing the query integration test infrastructure. Delivered the Query Integration Test Framework Modernization by migrating tests to an embedded framework, restructuring the test suite, removing obsolete tests, and introducing a dedicated QueryLaningTest to validate query management more effectively. This work tightens validation around query processing, shortens feedback cycles, and reduces maintenance overhead.
1 Commits • 1 Features
Feb 1, 2026February 2026 - Apache Druid: Focused on modernizing the query integration test infrastructure. Delivered the Query Integration Test Framework Modernization by migrating tests to an embedded framework, restructuring the test suite, removing obsolete tests, and introducing a dedicated QueryLaningTest to validate query management more effectively. This work tightens validation around query processing, shortens feedback cycles, and reduces maintenance overhead.
February 2026
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026: Focused on stabilizing Kafka integration tests and API reliability in apache/druid, delivering embedded ITs to boost fault tolerance and coverage, and addressing API flakiness to improve CI stability and developer productivity. These efforts directly shorten feedback cycles and reduce risk in deployments.
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026: Focused on stabilizing Kafka integration tests and API reliability in apache/druid, delivering embedded ITs to boost fault tolerance and coverage, and addressing API flakiness to improve CI stability and developer productivity. These efforts directly shorten feedback cycles and reduce risk in deployments.
December 2025
9 Commits • 3 Features
Dec 1, 20252025-12 Monthly Summary for apache/druid focusing on observability, reliability, and data-management efficiency. Delivered streaming metrics improvements, a more robust compaction policy, and several robustness and testing enhancements that collectively shorten feedback loops, reduce operational risk, and improve data quality.
9 Commits • 3 Features
Dec 1, 20252025-12 Monthly Summary for apache/druid focusing on observability, reliability, and data-management efficiency. Delivered streaming metrics improvements, a more robust compaction policy, and several robustness and testing enhancements that collectively shorten feedback loops, reduce operational risk, and improve data quality.
December 2025
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025: Delivered performance and reliability improvements for the Apache Druid project focused on data processing efficiency, ingestion capability, and test/build stability. Key workstreams delivered features that improve throughput, data accuracy, and developer velocity while reducing operational risk at scale. Key features delivered include enhancements to data processing and storage for MSQ compaction and the ability to ingest offsets and partition metadata, enabling more accurate data lineage and partition-aware processing. In addition, the testing infrastructure was modernized to raise reliability and build stability by updating authentication tests and dependencies.
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025: Delivered performance and reliability improvements for the Apache Druid project focused on data processing efficiency, ingestion capability, and test/build stability. Key workstreams delivered features that improve throughput, data accuracy, and developer velocity while reducing operational risk at scale. Key features delivered include enhancements to data processing and storage for MSQ compaction and the ability to ingest offsets and partition metadata, enabling more accurate data lineage and partition-aware processing. In addition, the testing infrastructure was modernized to raise reliability and build stability by updating authentication tests and dependencies.
October 2025
4 Commits • 2 Features
Oct 1, 2025Month 2025-10: Delivered security and stability enhancements for apache/druid, with a focus on secure access to operational data and streamlined testing workflows. Key features delivered: - Compaction Status API Access Control: Added authorization check to ensure only authorized users can access compaction status information when the supervisor is disabled, enhancing security and compliance for OverlordCompactionResource interactions. - Test Infrastructure and Stability Improvements: Consolidated and hardened test infrastructure, including updates to embedded test components and timing adjustments to reduce flakiness. Major achievements: - Implemented authorization for the Compaction Status API (commit 84b4c83d59377c4672b848b02bd71a091ff5286b). - Updated test infrastructure: embedded druid-operator image tag set to v1.3.0 (commit 102459401f754b52bb8fd2be4900f5614eb17be9). - Stabilized tests by increasing the CentralizedSchemaMetadataQueryDisabledTest timeout to 60 seconds (commit 65158fac933873612f01f3e8739ddab7042a994e). - Migrated revised integration tests to the embedded-tests module to streamline workflows (commit a72eaa8d8024e880b06411534e4f9cf03bc1394a). Overall impact and accomplishments: - Security: Access to compaction status is now restricted to authorized users, reducing exposure in supervisor-disabled scenarios. - Reliability: Test suite stability improved through timeout tuning and centralized test placement, leading to faster feedback cycles and more reliable releases. - Efficiency: Consolidated test modules and configurations simplify maintenance and future testing workflows. Technologies/skills demonstrated: - Java-based REST API security and access control integration. - Test infrastructure enhancement and migration (embedded-tests module, image tagging, timeout tuning). - CI/CD-friendly changes with traceable commits and test stability considerations.
4 Commits • 2 Features
Oct 1, 2025Month 2025-10: Delivered security and stability enhancements for apache/druid, with a focus on secure access to operational data and streamlined testing workflows. Key features delivered: - Compaction Status API Access Control: Added authorization check to ensure only authorized users can access compaction status information when the supervisor is disabled, enhancing security and compliance for OverlordCompactionResource interactions. - Test Infrastructure and Stability Improvements: Consolidated and hardened test infrastructure, including updates to embedded test components and timing adjustments to reduce flakiness. Major achievements: - Implemented authorization for the Compaction Status API (commit 84b4c83d59377c4672b848b02bd71a091ff5286b). - Updated test infrastructure: embedded druid-operator image tag set to v1.3.0 (commit 102459401f754b52bb8fd2be4900f5614eb17be9). - Stabilized tests by increasing the CentralizedSchemaMetadataQueryDisabledTest timeout to 60 seconds (commit 65158fac933873612f01f3e8739ddab7042a994e). - Migrated revised integration tests to the embedded-tests module to streamline workflows (commit a72eaa8d8024e880b06411534e4f9cf03bc1394a). Overall impact and accomplishments: - Security: Access to compaction status is now restricted to authorized users, reducing exposure in supervisor-disabled scenarios. - Reliability: Test suite stability improved through timeout tuning and centralized test placement, leading to faster feedback cycles and more reliable releases. - Efficiency: Consolidated test modules and configurations simplify maintenance and future testing workflows. Technologies/skills demonstrated: - Java-based REST API security and access control integration. - Test infrastructure enhancement and migration (embedded-tests module, image tagging, timeout tuning). - CI/CD-friendly changes with traceable commits and test stability considerations.
October 2025
September 2025
14 Commits • 3 Features
Sep 1, 2025September 2025 (2025-09) – Apache Druid delivered a cohesive push to test reliability and operational robustness, with a strong emphasis on embedded testing, clean shutdown semantics, and persistence simplifications. Key deliverables include: (1) Embedded Test Framework and Reliability Improvements that migrated catalog, MSQ, and related ITs to the embedded framework, created test builders for Kafka supervisor specs, ioConfig, and tuningConfig, and optimized timeouts and synchronization to reduce flakiness and overall test runtime. (2) Robust Task/Service Shutdown Improvements that enable asynchronous, idempotent shutdown in TaskRunner and KubernetesWorkItem, reducing deadlock risk and improving resilience in containerized environments. (3) Indexing-Service Refactor and Task Persistence Simplification, moving persistence handlers into the indexing-service module to clarify persistence logic and improve maintainability. These initiatives collectively shorten feedback loops, raise CI reliability, and enable safer deployment through more predictable test results and operational behavior.
September 2025
14 Commits • 3 Features
Sep 1, 2025September 2025 (2025-09) – Apache Druid delivered a cohesive push to test reliability and operational robustness, with a strong emphasis on embedded testing, clean shutdown semantics, and persistence simplifications. Key deliverables include: (1) Embedded Test Framework and Reliability Improvements that migrated catalog, MSQ, and related ITs to the embedded framework, created test builders for Kafka supervisor specs, ioConfig, and tuningConfig, and optimized timeouts and synchronization to reduce flakiness and overall test runtime. (2) Robust Task/Service Shutdown Improvements that enable asynchronous, idempotent shutdown in TaskRunner and KubernetesWorkItem, reducing deadlock risk and improving resilience in containerized environments. (3) Indexing-Service Refactor and Task Persistence Simplification, moving persistence handlers into the indexing-service module to clarify persistence logic and improve maintainability. These initiatives collectively shorten feedback loops, raise CI reliability, and enable safer deployment through more predictable test results and operational behavior.
August 2025
6 Commits • 3 Features
Aug 1, 2025August 2025: Strengthened testing infrastructure and core capabilities for Apache Druid, delivering broader embedded testing support, improved test reliability, and closer integration of core features into the main product. The work enables faster feedback, safer releases, and more consistent test outcomes across environments (Docker, K3s) and configurations.
6 Commits • 3 Features
Aug 1, 2025August 2025: Strengthened testing infrastructure and core capabilities for Apache Druid, delivering broader embedded testing support, improved test reliability, and closer integration of core features into the main product. The work enables faster feedback, safer releases, and more consistent test outcomes across environments (Docker, K3s) and configurations.
August 2025
July 2025
18 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary focusing on delivered features, major fixes, overall impact, and skills demonstrated. Highlights include an embedded test framework overhaul with high availability validation, per-task logging, observability improvements, and monitor/service client modernization, complemented by fixes to data integrity during concurrent segment allocation and improvements in historical cloning workflows. The work positively affects deployment safety, data correctness, operational reliability, and developer velocity.
July 2025
18 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary focusing on delivered features, major fixes, overall impact, and skills demonstrated. Highlights include an embedded test framework overhaul with high availability validation, per-task logging, observability improvements, and monitor/service client modernization, complemented by fixes to data integrity during concurrent segment allocation and improvements in historical cloning workflows. The work positively affects deployment safety, data correctness, operational reliability, and developer velocity.
June 2025
11 Commits • 5 Features
Jun 1, 2025June 2025 monthly summary for apache/druid focused on performance, reliability, and observability improvements across core task and segment lifecycle features. Delivered embedded kill tasks on Overlord to reduce task-slot overhead and improve resource utilization, added a global TaskLockbox with multithreaded SegmentAllocationQueue to boost cross-datasource throughput, and enhanced task/run metrics for better observability. Fixed API response serialization issues to ensure robust JSON endpoints, and resolved a segment replication race condition with a new simulation test to improve data consistency during migrations. Also advanced testing infrastructure with embedded Druid cluster tests to enable end-to-end validation in a single JVM, strengthening end-to-end quality and developer productivity.
11 Commits • 5 Features
Jun 1, 2025June 2025 monthly summary for apache/druid focused on performance, reliability, and observability improvements across core task and segment lifecycle features. Delivered embedded kill tasks on Overlord to reduce task-slot overhead and improve resource utilization, added a global TaskLockbox with multithreaded SegmentAllocationQueue to boost cross-datasource throughput, and enhanced task/run metrics for better observability. Fixed API response serialization issues to ensure robust JSON endpoints, and resolved a segment replication race condition with a new simulation test to improve data consistency during migrations. Also advanced testing infrastructure with embedded Druid cluster tests to enable end-to-end validation in a single JVM, strengthening end-to-end quality and developer productivity.
June 2025
May 2025
10 Commits • 5 Features
May 1, 2025May 2025 monthly summary for apache/druid. Focused on reliability, performance, and security across core data paths. Delivered five key initiatives with clear business impact, backed by targeted tests and refactoring: - Segment metadata storage correctness: ensured atomicity of commitSegmentsAndMetadata and robust SegmentId-based lookups; tests added to verify atomicity and a fix to the Coordinator API MetadataResource.getSegment. - Fault-injection testing infrastructure: introduced ClusterTestingModule for fault injection in test clusters and expanded testing to cover fault configurations and non-deterministic behavior. - Concurrency and caching improvements: increased TaskQueue concurrency, replaced monolithic locks with concurrent data structures, and improved coordination caches to reduce race conditions and boost throughput. - Security hardening: centralized authorization for reading external resources across indexing services using new utility methods. - Metadata schema refactor and configuration binding: renamed metrics for clarity in centralized datasource schema and bound configuration to MetadataConfigModule for cross-service management. These changes collectively improve data reliability, system resilience, security posture, and cross-service maintainability. Technologies/skills demonstrated: fault-injection testing, advanced concurrency primitives and data structures, centralized authorization utilities, configuration binding and cross-service management, and ongoing emphasis on code quality and maintainability.
May 2025
10 Commits • 5 Features
May 1, 2025May 2025 monthly summary for apache/druid. Focused on reliability, performance, and security across core data paths. Delivered five key initiatives with clear business impact, backed by targeted tests and refactoring: - Segment metadata storage correctness: ensured atomicity of commitSegmentsAndMetadata and robust SegmentId-based lookups; tests added to verify atomicity and a fix to the Coordinator API MetadataResource.getSegment. - Fault-injection testing infrastructure: introduced ClusterTestingModule for fault injection in test clusters and expanded testing to cover fault configurations and non-deterministic behavior. - Concurrency and caching improvements: increased TaskQueue concurrency, replaced monolithic locks with concurrent data structures, and improved coordination caches to reduce race conditions and boost throughput. - Security hardening: centralized authorization for reading external resources across indexing services using new utility methods. - Metadata schema refactor and configuration binding: renamed metrics for clarity in centralized datasource schema and bound configuration to MetadataConfigModule for cross-service management. These changes collectively improve data reliability, system resilience, security posture, and cross-service maintainability. Technologies/skills demonstrated: fault-injection testing, advanced concurrency primitives and data structures, centralized authorization utilities, configuration binding and cross-service management, and ongoing emphasis on code quality and maintainability.
April 2025
11 Commits • 6 Features
Apr 1, 2025April 2025 performance summary for apache/druid: Key features delivered include unified compaction APIs with dynamic slot management and segment metadata cache improvements; security and testing infrastructure enhancements; notable bug fix for leader election robustness. Overall impact: improved reliability, performance, and security; better developer productivity and maintainability.
11 Commits • 6 Features
Apr 1, 2025April 2025 performance summary for apache/druid: Key features delivered include unified compaction APIs with dynamic slot management and segment metadata cache improvements; security and testing infrastructure enhancements; notable bug fix for leader election robustness. Overall impact: improved reliability, performance, and security; better developer productivity and maintainability.
April 2025
March 2025
13 Commits • 6 Features
Mar 1, 2025March 2025 highlights for Apache Druid: delivered core reliability and performance improvements across Overlord and segment ingestion paths, improved observability, and cleaned configuration/build processes to reduce operational overhead. Specific focus areas include Overlord SegmentMetadataCache enhancements, turbo loading and robust publish retries, reduced log noise for critical issues, and configuration/dynamic control updates for compaction and MSQ memory estimation.
March 2025
13 Commits • 6 Features
Mar 1, 2025March 2025 highlights for Apache Druid: delivered core reliability and performance improvements across Overlord and segment ingestion paths, improved observability, and cleaned configuration/build processes to reduce operational overhead. Specific focus areas include Overlord SegmentMetadataCache enhancements, turbo loading and robust publish retries, reduced log noise for critical issues, and configuration/dynamic control updates for compaction and MSQ memory estimation.
February 2025
8 Commits • 3 Features
Feb 1, 2025February 2025 performance and delivery summary for the apache/druid repository. Focused on speed, reliability, and maintainability improvements with concrete feature delivery, observability, and modernization across the codebase.
8 Commits • 3 Features
Feb 1, 2025February 2025 performance and delivery summary for the apache/druid repository. Focused on speed, reliability, and maintainability improvements with concrete feature delivery, observability, and modernization across the codebase.
February 2025
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 performance summary for apache/druid focusing on delivering user value through documentation, GA rollout, and code cleanup. Delivered clear operational guidance on segment balancing, completed a GA rollout of the concurrent locks feature with documentation updates and a default enablement configuration for Overlord-managed ingestion and compaction jobs, and cleaned up legacy code and tests by removing CuratorLoadQueuePeon and refactoring related tests. The work reduces operational risk, simplifies onboarding, and improves maintainability across the Coordinator, Overlord, and Historical services.
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 performance summary for apache/druid focusing on delivering user value through documentation, GA rollout, and code cleanup. Delivered clear operational guidance on segment balancing, completed a GA rollout of the concurrent locks feature with documentation updates and a default enablement configuration for Overlord-managed ingestion and compaction jobs, and cleaned up legacy code and tests by removing CuratorLoadQueuePeon and refactoring related tests. The work reduces operational risk, simplifies onboarding, and improves maintainability across the Coordinator, Overlord, and Historical services.
December 2024
5 Commits • 3 Features
Dec 1, 2024December 2024 performance note for apache/druid: Delivered stability and resiliency improvements across segment allocation and Overlord-based update flows, reduced log noise, and strengthened test coverage. These changes improve runtime stability in production, reduce troubleshooting time, and simplify maintenance.
5 Commits • 3 Features
Dec 1, 2024December 2024 performance note for apache/druid: Delivered stability and resiliency improvements across segment allocation and Overlord-based update flows, reduced log noise, and strengthened test coverage. These changes improve runtime stability in production, reduce troubleshooting time, and simplify maintenance.
December 2024
November 2024
1 Commits • 1 Features
Nov 1, 20242024-11 monthly summary for Apache Druid development: Delivered a performance-oriented feature to reduce metadata I/O during Overlord segment allocation by introducing a new configuration, druid.indexer.tasklock.batchAllocationReduceMetadataIO. The change fetches only the necessary segment payloads, reducing metadata IO and improving allocation efficiency, scalability, and predictability under growth. Implemented as part of commit 207ad16f075e0894cf363dc2ac193d92729e4179 (Reduce metadata IO during segment allocation #17496). No major bugs fixed this month; focus was on delivering business value through technical optimization and operator tunability.
November 2024
1 Commits • 1 Features
Nov 1, 20242024-11 monthly summary for Apache Druid development: Delivered a performance-oriented feature to reduce metadata I/O during Overlord segment allocation by introducing a new configuration, druid.indexer.tasklock.batchAllocationReduceMetadataIO. The change fetches only the necessary segment payloads, reducing metadata IO and improving allocation efficiency, scalability, and predictability under growth. Implemented as part of commit 207ad16f075e0894cf363dc2ac193d92729e4179 (Reduce metadata IO during segment allocation #17496). No major bugs fixed this month; focus was on delivering business value through technical optimization and operator tunability.
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary focused on delivering measurable business value and simplifying configuration to reduce maintenance risk. Key feature delivered: Druid Coordinator Configuration Simplification by removing unused dynamic configuration parameters mergeSegmentsLimit and mergeBytesLimit; updated documentation and code accordingly to reflect the removal and simplify configuration options.
1 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary focused on delivering measurable business value and simplifying configuration to reduce maintenance risk. Key feature delivered: Druid Coordinator Configuration Simplification by removing unused dynamic configuration parameters mergeSegmentsLimit and mergeBytesLimit; updated documentation and code accordingly to reflect the removal and simplify configuration options.
October 2024
Activity
Loading activity data...
Quality Metrics
Correctness90.8%
Maintainability88.0%
Architecture86.2%
Performance81.0%
AI Usage20.8%
Skills & Technologies
Programming Languages
JSONJavaMarkdownPropertiesPythonSQLShellTypeScriptXMLYAML
Technical Skills
API DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI SecurityAsynchronous ProgrammingAuthorizationBackend DevelopmentBasic AuthenticationBug FixingBuild AutomationBuild System ConfigurationBuilder PatternCI/CDCI/CD Configuration
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline