apache/impala
Aug 2024 – Mar 2026
12 Months active
Languages Used
C++JavaScriptCSSHTMLPythonJSONShellJava
Technical Skills
C++ developmentJSON handlingUnit testingES6JavaScriptfront end development
Surya Hebbar
PROFILE
Surya Hebbar
Over the past year, this developer enhanced the apache/impala project by delivering features and fixes across backend, frontend, and test infrastructure. They modernized the Web UI with ES6 JavaScript, improved JSON profile observability using C++ and Python, and optimized performance through compression algorithms and memory management. Their work included stabilizing runtime profile tests, expanding compression level support, and refining error handling in SQL aggregation. By integrating tools like ESLint and DataTables, they improved code quality and data visualization. Their approach emphasized maintainability, efficient profiling, and robust testing, resulting in a more reliable, performant, and user-friendly analytics platform.
Overall Statistics
Feature vs Bugs
68%Features
Repository Contributions
21Total
Bugs
6
Commits
21
Features
13
Lines of code
17,587
Activity Months12
Your Network
149 peopleSame Organization
@cloudera.com98
Shared Repositories
51
Work History
March 2026
1 Commits • 1 Features
Mar 1, 2026Month 2026-03 — Apache Impala: Key accomplishments and impact. Focused on delivering a performance-oriented test suite improvement and enabling the aggregated profile. Highlights include replacing row_regex with aggregation tests to boost efficiency and compatibility with both traditional and aggregated profiles; this work is linked to IMPALA-14793 and IMPALA-9846, enabling faster CI feedback with a leaner test suite.
1 Commits • 1 Features
Mar 1, 2026Month 2026-03 — Apache Impala: Key accomplishments and impact. Focused on delivering a performance-oriented test suite improvement and enabling the aggregated profile. Highlights include replacing row_regex with aggregation tests to boost efficiency and compatibility with both traditional and aggregated profiles; this work is linked to IMPALA-14793 and IMPALA-9846, enabling faster CI feedback with a leaner test suite.
March 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 (apache/impala): Delivered a targeted metrics enhancement by adopting Iceberg's built-in InMemoryMetricsReporter, simplifying the metrics path and reducing maintenance overhead. The effort focused on replacing a custom private reporter with the Iceberg-provided implementation and streamlining the metrics collection flow for clarity and reliability.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 (apache/impala): Delivered a targeted metrics enhancement by adopting Iceberg's built-in InMemoryMetricsReporter, simplifying the metrics path and reducing maintenance overhead. The effort focused on replacing a custom private reporter with the Iceberg-provided implementation and streamlining the metrics collection flow for clarity and reliability.
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026: Focused on delivering clearer user guidance for complex-type aggregations and boosting test performance in Impala. Key outcomes include replacing IllegalStateException with AnalysisException for complex-type GROUP BYs, and optimizing runtime profile tests by removing greedy regex patterns and batching searches, resulting in faster feedback and reduced resource usage.
2 Commits • 1 Features
Jan 1, 2026January 2026: Focused on delivering clearer user guidance for complex-type aggregations and boosting test performance in Impala. Key outcomes include replacing IllegalStateException with AnalysisException for complex-type GROUP BYs, and optimizing runtime profile tests by removing greedy regex patterns and batching searches, resulting in faster feedback and reduced resource usage.
January 2026
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary for apache/impala. Focus area: Webserver stability under concurrent workloads. Key accomplishment: fixed a MemTracker data race in the Webserver by introducing a shared mutex to guard access to the compressed buffer memory tracker, addressing TSAN build failures and enhancing runtime reliability. This work maps to IMPALA-14278 and was committed as 09a6f0e6cd912f573f0d8950abf40f498385c628. Impact: more stable Webserver component under load, fewer memory-tracking related incidents, smoother CI builds. Technologies/skills demonstrated: concurrency control (mutex), memory tracking, TSAN debugging, C++ multi-threading, review-ready change management.
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary for apache/impala. Focus area: Webserver stability under concurrent workloads. Key accomplishment: fixed a MemTracker data race in the Webserver by introducing a shared mutex to guard access to the compressed buffer memory tracker, addressing TSAN build failures and enhancing runtime reliability. This work maps to IMPALA-14278 and was committed as 09a6f0e6cd912f573f0d8950abf40f498385c628. Impact: more stable Webserver component under load, fewer memory-tracking related incidents, smoother CI builds. Technologies/skills demonstrated: concurrency control (mutex), memory tracking, TSAN debugging, C++ multi-threading, review-ready change management.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for Apache Impala development focused on UI quality improvements and test infrastructure modernization. Key work included user-visible enhancements to the WebUI Imported Query Profiles view and the standardization of WebUI JavaScript test naming, both of which improve usability and maintainability. These changes reduce ambiguity in profiling data, streamline test failure analysis, and align with project-wide quality standards. Key outcomes: (1) imported query profiles display improvements (correct nanosecond time rendering, fixed navbar, and removal of extraneous Coordin ator/Executor Slots columns); (2) WebUI JavaScript tests naming standardized to webui.js_tests.<module>.<function>.<description> for better organization and reliable JUnit XML reporting.
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for Apache Impala development focused on UI quality improvements and test infrastructure modernization. Key work included user-visible enhancements to the WebUI Imported Query Profiles view and the standardization of WebUI JavaScript test naming, both of which improve usability and maintainability. These changes reduce ambiguity in profiling data, streamline test failure analysis, and align with project-wide quality standards. Key outcomes: (1) imported query profiles display improvements (correct nanosecond time rendering, fixed navbar, and removal of extraneous Coordin ator/Executor Slots columns); (2) WebUI JavaScript tests naming standardized to webui.js_tests.<module>.<function>.<description> for better organization and reliable JUnit XML reporting.
June 2025
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 (2025-05) summary: Delivered reliability and maintainability improvements to the Apache Impala web UI and data visualization. Key features delivered include frontend linting and coding standard updates for large JavaScript files to improve maintainability; major bugs fixed include stabilizing the query timeline visualization after the web UI refactor and clarifying missing event timestamps in JSON profiles. Overall impact: restored accurate query execution details, improved visualization alignment, and stronger code quality across the web UI; technologies demonstrated include JavaScript linting, UI data visualization, and robust handling of event data.
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 (2025-05) summary: Delivered reliability and maintainability improvements to the Apache Impala web UI and data visualization. Key features delivered include frontend linting and coding standard updates for large JavaScript files to improve maintainability; major bugs fixed include stabilizing the query timeline visualization after the web UI refactor and clarifying missing event timestamps in JSON profiles. Overall impact: restored accurate query execution details, improved visualization alignment, and stronger code quality across the web UI; technologies demonstrated include JavaScript linting, UI data visualization, and robust handling of event data.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/impala focusing on business value and technical achievements. Delivered expanded compression level support for ZLIB, ZSTD, and BZIP2 in Impala, enabling finer control over data encoding and storage efficiency. The change refactors CodecInfo to use std::optional for compression levels, adds extended options for ZLIB, ZSTD, and BZIP2 codecs, and includes new tests and validation methods to prevent misconfiguration. This work is tied to IMPALA-13923 and the commit below, contributing to better performance, storage flexibility, and safer defaults.
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/impala focusing on business value and technical achievements. Delivered expanded compression level support for ZLIB, ZSTD, and BZIP2 in Impala, enabling finer control over data encoding and storage efficiency. The change refactors CodecInfo to use std::optional for compression levels, adds extended options for ZLIB, ZSTD, and BZIP2 codecs, and includes new tests and validation methods to prevent misconfiguration. This work is tied to IMPALA-13923 and the commit below, contributing to better performance, storage flexibility, and safer defaults.
April 2025
March 2025
3 Commits • 3 Features
Mar 1, 2025March 2025 monthly summary for apache/impala development work focusing on delivering user-facing improvements, performance optimizations, and code quality tooling in the Web UI and JSON handling.
March 2025
3 Commits • 3 Features
Mar 1, 2025March 2025 monthly summary for apache/impala development work focusing on delivering user-facing improvements, performance optimizations, and code quality tooling in the Web UI and JSON handling.
February 2025
3 Commits
Feb 1, 2025February 2025: Focused on stabilizing the Apache Impala runtime-profile-test. Delivered reliability improvements, corrected flakiness, and aligned test observability with current JSON profile outputs. Implemented test fixture refactor, added retries for setup, and resolved TSAN build failures by updating event sequencing to pass values by reference. These efforts improved CI stability, reduced false positives, and provided a more maintainable test suite.
3 Commits
Feb 1, 2025February 2025: Focused on stabilizing the Apache Impala runtime-profile-test. Delivered reliability improvements, corrected flakiness, and aligned test observability with current JSON profile outputs. Implemented test fixture refactor, added retries for setup, and resolved TSAN build failures by updating event sequencing to pass values by reference. These efforts improved CI stability, reduced false positives, and provided a more maintainable test suite.
February 2025
December 2024
2 Commits • 2 Features
Dec 1, 2024December 2024: Delivered significant UI and profiling enhancements on apache/impala to boost observability and performance diagnostics. Implemented row grouping on the Fragment Instances page using DataTables RowGroup with an updated DataTables library and licensing, enabling faster fragmentation-level analysis. Enhanced runtime profiles readability and skew analysis: added a concise textual representation for aggregate event sequences, streamlined timestamp display, and introduced histogram-based skew summaries in profile V2. No major bugs fixed this month. These changes reduce time-to-insight for performance engineers and improve data-driven decision making for cluster tuning.
December 2024
2 Commits • 2 Features
Dec 1, 2024December 2024: Delivered significant UI and profiling enhancements on apache/impala to boost observability and performance diagnostics. Implemented row grouping on the Fragment Instances page using DataTables RowGroup with an updated DataTables library and licensing, enabling faster fragmentation-level analysis. Enhanced runtime profiles readability and skew analysis: added a concise textual representation for aggregate event sequences, streamlined timestamp display, and introduced histogram-based skew summaries in profile V2. No major bugs fixed this month. These changes reduce time-to-insight for performance engineers and improve data-driven decision making for cluster tuning.
September 2024
1 Commits • 1 Features
Sep 1, 2024September 2024 — Apache Impala (apache/impala): Delivered Web UI modernization by refactoring the web UI to ES6 syntax and applying naming standardization. This work reduces technical debt, improves readability, and enables faster future feature delivery. No major bugs fixed this month; focus was on code quality and maintainability. Key commit IMPALA-13389 (37d4a4eb56f56a392208eac4178ee2b739f90d52).
1 Commits • 1 Features
Sep 1, 2024September 2024 — Apache Impala (apache/impala): Delivered Web UI modernization by refactoring the web UI to ES6 syntax and applying naming standardization. This work reduces technical debt, improves readability, and enables faster future feature delivery. No major bugs fixed this month; focus was on code quality and maintainability. Key commit IMPALA-13389 (37d4a4eb56f56a392208eac4178ee2b739f90d52).
September 2024
August 2024
1 Commits • 1 Features
Aug 1, 2024August 2024 Monthly Summary for apache/impala: Implemented key feature enhancements to the Aggregated Profile JSON to improve observability without inflating payload size. The primary delivery includes instance-level metrics (aggregated event sequences and info strings), a new method for efficient timestamp aggregation, and enhanced diagnostics for instances with missing events. These changes enable faster root-cause analysis and more accurate performance tuning by providing richer per-instance insights while maintaining manageable profile footprint.
August 2024
1 Commits • 1 Features
Aug 1, 2024August 2024 Monthly Summary for apache/impala: Implemented key feature enhancements to the Aggregated Profile JSON to improve observability without inflating payload size. The primary delivery includes instance-level metrics (aggregated event sequences and info strings), a new method for efficient timestamp aggregation, and enhanced diagnostics for instances with missing events. These changes enable faster root-cause analysis and more accurate performance tuning by providing richer per-instance insights while maintaining manageable profile footprint.
Activity
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Quality Metrics
Correctness94.2%
Maintainability88.6%
Architecture84.8%
Performance82.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++CSSHTMLJSONJavaJavaScriptPythonShell
Technical Skills
Backend DevelopmentBuild SystemsC++C++ DevelopmentC++ developmentCI/CDCSSCode AnalysisCode QualityCompression AlgorithmsConcurrencyData AnalysisData ProfilingDataTablesDebugging
Repositories Contributed To
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