apache/impala
Sep 2024 – Jan 2026
17 Months active
Languages Used
C++JavaPythonSQLThriftShellBashCMake
Technical Skills
backend developmentmemory managementperformance optimizationBackend DevelopmentDatabaseDebugging
Riza Suminto
PROFILE
Riza Suminto
Over 17 months, contributed to the apache/impala repository by building and refining core backend features, focusing on query planning, catalog management, and test infrastructure. Leveraging C++, Java, and Python, delivered enhancements such as parallelized table loading, improved memory management for spill-prone queries, and robust cardinality estimation. Addressed reliability by modernizing test suites for Python 3 compatibility and stabilizing CI pipelines, while also implementing protocol migrations from Beeswax to HS2. The work emphasized performance optimization, concurrency control, and system integration, resulting in more predictable deployments, reduced test flakiness, and improved developer velocity across distributed data processing environments.
Overall Statistics
Feature vs Bugs
54%Features
Repository Contributions
155Total
Bugs
38
Commits
155
Features
44
Lines of code
77,563
Activity Months17
Your Network
149 peopleSame Organization
@cloudera.com98
Shared Repositories
51
Work History
January 2026
3 Commits • 1 Features
Jan 1, 2026January 2026 (apache/impala): Delivered targeted improvements to test infrastructure and data-source validation, driving faster feedback and higher reliability for release cycles. Key features delivered include Test Infrastructure Modernization and Python3 Compatibility and a JDBC External Data Source Tests Reliability Fix. The work reduces test brittleness, aligns with Python3 CI, and ensures accurate error validation across Impala/Hive tests. Overall impact: more robust test suite, safer data-source changes, and clearer signaling of failures, enabling more confident deployments. Technologies/skills demonstrated: Python3, pytest (up to 6.2.5), pytest-xdist/execnet, test configuration with ImpalaTestClusterProperties, fixture modernization, and cross-version validation (pytest 2.9.2 and 6.2.5) across Impala/Hive tests.
3 Commits • 1 Features
Jan 1, 2026January 2026 (apache/impala): Delivered targeted improvements to test infrastructure and data-source validation, driving faster feedback and higher reliability for release cycles. Key features delivered include Test Infrastructure Modernization and Python3 Compatibility and a JDBC External Data Source Tests Reliability Fix. The work reduces test brittleness, aligns with Python3 CI, and ensures accurate error validation across Impala/Hive tests. Overall impact: more robust test suite, safer data-source changes, and clearer signaling of failures, enabling more confident deployments. Technologies/skills demonstrated: Python3, pytest (up to 6.2.5), pytest-xdist/execnet, test configuration with ImpalaTestClusterProperties, fixture modernization, and cross-version validation (pytest 2.9.2 and 6.2.5) across Impala/Hive tests.
January 2026
December 2025
6 Commits • 1 Features
Dec 1, 2025December 2025: Focused on reliability, modernization, and infrastructure robustness for apache/impala. Delivered decisive fixes and improvements that reduce flaky tests, modernize the codebase to Python 3, and stabilize startup and integration paths across Ozone and HDFS components. These efforts translate into faster CI feedback, fewer test flakies, easier maintenance, and better readiness for Python 3-only deployments.
December 2025
6 Commits • 1 Features
Dec 1, 2025December 2025: Focused on reliability, modernization, and infrastructure robustness for apache/impala. Delivered decisive fixes and improvements that reduce flaky tests, modernize the codebase to Python 3, and stabilize startup and integration paths across Ozone and HDFS components. These efforts translate into faster CI feedback, fewer test flakies, easier maintenance, and better readiness for Python 3-only deployments.
November 2025
6 Commits
Nov 1, 2025November 2025 — Apache/Impala: Focused on test stability and toolchain modernization to deliver faster, more reliable validation across data pipelines and DDL workflows. Key outcomes include: (1) Stabilized test suites across paimon_show_stats, kudu_create.test, show-create-table, and test_show_files_partition by fixing DST-related assertions, updating regex-based validations, and correcting test expectations, reducing flakiness; (2) Upgraded Kudu/toolchain with KUDU-1261 and KUDU-3716 patches to resolve CSR signature verification issues on Red Hat 9, improving cross-environment reliability; (3) Demonstrated robust debugging, regex engineering, and CI discipline, enabling safer iterative changes and quicker feature deliverables.
6 Commits
Nov 1, 2025November 2025 — Apache/Impala: Focused on test stability and toolchain modernization to deliver faster, more reliable validation across data pipelines and DDL workflows. Key outcomes include: (1) Stabilized test suites across paimon_show_stats, kudu_create.test, show-create-table, and test_show_files_partition by fixing DST-related assertions, updating regex-based validations, and correcting test expectations, reducing flakiness; (2) Upgraded Kudu/toolchain with KUDU-1261 and KUDU-3716 patches to resolve CSR signature verification issues on Red Hat 9, improving cross-environment reliability; (3) Demonstrated robust debugging, regex engineering, and CI discipline, enabling safer iterative changes and quicker feature deliverables.
November 2025
October 2025
4 Commits • 3 Features
Oct 1, 2025October 2025 (2025-10) monthly summary focusing on business value, reliability, and maintainability for apache/impala. Key outcomes include delivering Kudu array column support in the Impala toolchain, stabilizing TSAN builds via a KuduClient workaround, clarifying Iceberg orphan file behavior with new documentation, and improving build traceability by logging Maven dependencies during frontend builds. Collectively, these efforts expand data type capabilities, reduce CI/build flakiness, improve user guidance, and enhance debugging efficiency.
October 2025
4 Commits • 3 Features
Oct 1, 2025October 2025 (2025-10) monthly summary focusing on business value, reliability, and maintainability for apache/impala. Key outcomes include delivering Kudu array column support in the Impala toolchain, stabilizing TSAN builds via a KuduClient workaround, clarifying Iceberg orphan file behavior with new documentation, and improving build traceability by logging Maven dependencies during frontend builds. Collectively, these efforts expand data type capabilities, reduce CI/build flakiness, improve user guidance, and enhance debugging efficiency.
September 2025
6 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for apache/impala: delivered stability and performance improvements in catalog/local catalog workflows, added parallel loading to reduce latency, and fixed critical defects affecting reliability and test stability. These changes reduce latency in common paths, improve throughput in local catalog mode, ensure compatibility with workload management and V2 profiles, and strengthen CI/QA with deflakes and regression fixes.
6 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for apache/impala: delivered stability and performance improvements in catalog/local catalog workflows, added parallel loading to reduce latency, and fixed critical defects affecting reliability and test stability. These changes reduce latency in common paths, improve throughput in local catalog mode, ensure compatibility with workload management and V2 profiles, and strengthen CI/QA with deflakes and regression fixes.
September 2025
August 2025
9 Commits • 2 Features
Aug 1, 2025In August 2025, delivered targeted enhancements and stability improvements for Apache Impala that drive better performance predictability, compatibility, and developer velocity across large clusters. Key outcomes include tuning capabilities for the distributed planner to optimize broadcast joins, aligning data-loading and workload execution with the HS2 protocol for future-proofing and testing efficiency, and a consolidated suite of test/build reliability fixes that reduce flaky behavior and accelerate release cycles. These efforts collectively enhance query performance control, simplify upgrades, and strengthen the reliability of CI/test pipelines while showcasing robust cross-cutting engineering skills.
August 2025
9 Commits • 2 Features
Aug 1, 2025In August 2025, delivered targeted enhancements and stability improvements for Apache Impala that drive better performance predictability, compatibility, and developer velocity across large clusters. Key outcomes include tuning capabilities for the distributed planner to optimize broadcast joins, aligning data-loading and workload execution with the HS2 protocol for future-proofing and testing efficiency, and a consolidated suite of test/build reliability fixes that reduce flaky behavior and accelerate release cycles. These efforts collectively enhance query performance control, simplify upgrades, and strengthen the reliability of CI/test pipelines while showcasing robust cross-cutting engineering skills.
July 2025
5 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for apache/impala: Delivered targeted reliability and stability improvements across critical subsystems, translating development work into measurable business value. Focused on stabilizing test and build environments, enhancing logging observability, and hardening high-availability (HA) behavior during failovers. Results include fewer flaky tests, deterministic build/test configurations, improved logging for AdmissionD, and robust catalog metadata handling that reduces downtime during transitions.
5 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for apache/impala: Delivered targeted reliability and stability improvements across critical subsystems, translating development work into measurable business value. Focused on stabilizing test and build environments, enhancing logging observability, and hardening high-availability (HA) behavior during failovers. Results include fewer flaky tests, deterministic build/test configurations, improved logging for AdmissionD, and robust catalog metadata handling that reduces downtime during transitions.
July 2025
June 2025
11 Commits • 6 Features
Jun 1, 2025June 2025 highlights across the apache/impala project. Delivered reliability and performance improvements across Iceberg integration, startup workflows, and cache coherence, complemented by CI/test stabilization and build hygiene. Key outcomes include faster, more reliable startup; improved cache behavior on partition changes; clearer operational visibility through logging enhancements; and preparatory steps for Java toolchain upgrades. These changes support production reliability, developer velocity, and upgrade readiness.
June 2025
11 Commits • 6 Features
Jun 1, 2025June 2025 highlights across the apache/impala project. Delivered reliability and performance improvements across Iceberg integration, startup workflows, and cache coherence, complemented by CI/test stabilization and build hygiene. Key outcomes include faster, more reliable startup; improved cache behavior on partition changes; clearer operational visibility through logging enhancements; and preparatory steps for Java toolchain upgrades. These changes support production reliability, developer velocity, and upgrade readiness.
May 2025
21 Commits • 8 Features
May 1, 2025May 2025 (apache/impala) focused on stabilizing the CI/test environment, delivering HS2 integration improvements, and elevating code quality, with direct business value in reliability and faster release cycles. Efforts spanned test stabilization, HS2 state handling, configuration cleanup, and test suite maintenance, enabling more predictable deployments and quicker feedback loops for developers and operators.
21 Commits • 8 Features
May 1, 2025May 2025 (apache/impala) focused on stabilizing the CI/test environment, delivering HS2 integration improvements, and elevating code quality, with direct business value in reliability and faster release cycles. Efforts spanned test stabilization, HS2 state handling, configuration cleanup, and test suite maintenance, enabling more predictable deployments and quicker feedback loops for developers and operators.
May 2025
April 2025
15 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/impala focusing on delivering stability, correctness, and developer productivity improvements that drive business value. Key work centered on test reliability, query planning/scheduling correctness, shell UX, and build/infra robustness. The initiatives reduced test flakiness, improved CI signal quality, tightened protocol consistency, and enhanced developer experience with clearer reporting and safer initialization checks.
April 2025
15 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/impala focusing on delivering stability, correctness, and developer productivity improvements that drive business value. Key work centered on test reliability, query planning/scheduling correctness, shell UX, and build/infra robustness. The initiatives reduced test flakiness, improved CI signal quality, tightened protocol consistency, and enhanced developer experience with clearer reporting and safer initialization checks.
March 2025
24 Commits • 9 Features
Mar 1, 2025March 2025 focused on stabilizing CI, hardening test infrastructure, and delivering core cleanups to improve reliability and adoption of HS2. Delivered execution summaries for ImpylaHS2, in-place CatalogD reset, and standardized workloads tests; fixed critical DCHECK and Kudu txn issues; major refactors to remove protocol-specific states and beeswax dependencies; enhanced logging; and improved test stability across multiple areas, enabling faster feedback to product teams.
24 Commits • 9 Features
Mar 1, 2025March 2025 focused on stabilizing CI, hardening test infrastructure, and delivering core cleanups to improve reliability and adoption of HS2. Delivered execution summaries for ImpylaHS2, in-place CatalogD reset, and standardized workloads tests; fixed critical DCHECK and Kudu txn issues; major refactors to remove protocol-specific states and beeswax dependencies; enhanced logging; and improved test stability across multiple areas, enabling faster feedback to product teams.
March 2025
February 2025
8 Commits
Feb 1, 2025February 2025: Delivered key fixes to Impala core query handling and significantly strengthened test infrastructure to boost reliability and determinism. Reconciled Hive label rewriting behavior, stabilized default query option restoration, and implemented test isolation and resource improvements to reduce flakiness across environments. These changes enhance cross-version compatibility, reduce release risk, and improve developer velocity.
February 2025
8 Commits
Feb 1, 2025February 2025: Delivered key fixes to Impala core query handling and significantly strengthened test infrastructure to boost reliability and determinism. Reconciled Hive label rewriting behavior, stabilized default query option restoration, and implemented test isolation and resource improvements to reduce flakiness across environments. These changes enhance cross-version compatibility, reduce release risk, and improve developer velocity.
January 2025
17 Commits • 3 Features
Jan 1, 2025Concise monthly summary for 2025-01 focusing on development activity in apache/impala. The period delivered notable feature toggles for aggregation analysis, refined cost modeling for pre-aggregation, and notable infrastructure improvements, while fixing a critical clock-skew bug in distributed execution. Results include more accurate query plans, tunable aggregation behavior for workloads, and improved test reliability across CI.
17 Commits • 3 Features
Jan 1, 2025Concise monthly summary for 2025-01 focusing on development activity in apache/impala. The period delivered notable feature toggles for aggregation analysis, refined cost modeling for pre-aggregation, and notable infrastructure improvements, while fixing a critical clock-skew bug in distributed execution. Results include more accurate query plans, tunable aggregation behavior for workloads, and improved test reliability across CI.
January 2025
December 2024
5 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for apache/impala focused on delivering spec-aligned schema changes, strengthened tooling/observability, and robust test coverage, with a critical fix to cardinality handling that improves query planning stability. Delivered concrete business value through schema alignment with TPC-DS v2.11.0, increased test reliability and coverage, and enhanced WebUI visibility and maintainability of tooling components.
December 2024
5 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for apache/impala focused on delivering spec-aligned schema changes, strengthened tooling/observability, and robust test coverage, with a critical fix to cardinality handling that improves query planning stability. Delivered concrete business value through schema alignment with TPC-DS v2.11.0, increased test reliability and coverage, and enhanced WebUI visibility and maintainability of tooling components.
November 2024
11 Commits • 2 Features
Nov 1, 2024In 2024-11, the Impala effort focused on strengthening query planning accuracy, data scan correctness, and developer tooling, delivering measurable business value through more reliable plan choices and faster debugging.
11 Commits • 2 Features
Nov 1, 2024In 2024-11, the Impala effort focused on strengthening query planning accuracy, data scan correctness, and developer tooling, delivering measurable business value through more reliable plan choices and faster debugging.
November 2024
October 2024
3 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on apache/impala. Delivered targeted improvements across the distributed planner, CTAS observability, and test infrastructure, delivering measurable business value through more accurate cost-based planning, better monitoring/admission control, and more reliable CI tests.
October 2024
3 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on apache/impala. Delivered targeted improvements across the distributed planner, CTAS observability, and test infrastructure, delivering measurable business value through more accurate cost-based planning, better monitoring/admission control, and more reliable CI tests.
September 2024
1 Commits • 1 Features
Sep 1, 2024September 2024 — Apache Impala: Implemented memory management improvements for spill-prone queries by introducing a SpillableOperator interface and adapting PlanNodes to use memory estimation with configurable limits. This enhances stability and predictability when queries may spill to disk.
1 Commits • 1 Features
Sep 1, 2024September 2024 — Apache Impala: Implemented memory management improvements for spill-prone queries by introducing a SpillableOperator interface and adapting PlanNodes to use memory estimation with configurable limits. This enhances stability and predictability when queries may spill to disk.
September 2024
Activity
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Quality Metrics
Correctness92.6%
Maintainability88.2%
Architecture85.6%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
BashC++CMakeJavaPythonSQLShellThriftXML
Technical Skills
API DevelopmentAPI IntegrationBackend DevelopmentBug FixingBuild AutomationBuild EngineeringBuild ScriptingBuild SystemBuild System ConfigurationBuild SystemsC++C++ DevelopmentCI/CDCI/CD OptimizationCI/CD integration
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline