apache/spark
Nov 2025 – Dec 2025
2 Months active
Languages Used
Scala
Technical Skills
Scalabackend developmentunit testingApache Spark
Eric Yang
PROFILE
Eric Yang
Eric Yang contributed targeted backend improvements to the apache/spark repository, focusing on the correctness and reliability of Spark’s internal metrics. Over two months, he addressed two subtle bugs in Scala, refining how status metrics are computed and displayed in the Spark UI. His work included correcting argument order in metric negation logic and ensuring the METRIC_RESULT_SIZE accurately reflects computation results, both verified with dedicated unit tests. These changes, implemented with Apache Spark and Scala, enhanced the integrity of Spark’s observability without altering user-facing behavior, demonstrating careful attention to detail and a strong understanding of backend metric reporting and validation.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
2Total
Bugs
2
Commits
2
Features
0
Lines of code
208
Activity Months2
Your Network
324 peopleWork History
December 2025
1 Commits
Dec 1, 2025Month: 2025-12 — Focused on metric correctness and observability in Spark. Delivered a targeted bug fix to METRIC_RESULT_SIZE so the metric reflects the actual result size after computation, rather than always zero. This improved resource accounting and monitoring accuracy without introducing user-facing changes. The work was verified locally and linked to SPARK-54533; related Jira issue #53243 closed.
1 Commits
Dec 1, 2025Month: 2025-12 — Focused on metric correctness and observability in Spark. Delivered a targeted bug fix to METRIC_RESULT_SIZE so the metric reflects the actual result size after computation, rather than always zero. This improved resource accounting and monitoring accuracy without introducing user-facing changes. The work was verified locally and linked to SPARK-54533; related Jira issue #53243 closed.
December 2025
November 2025
1 Commits
Nov 1, 2025Month: 2025-11 — Focused on improving correctness and reliability of Spark's status metrics in the UI. Delivered a targeted bug fix in apache/spark that corrects the argument order in the createMetrics call within LiveEntityHelpers.makeNegative, ensuring accurate negation of metrics across shuffled metric categories. The patch (commit a75815e7b7e79a01cae9b595842aae5328e809be) aligns with SPARK-54505, includes a new unit test, and was reviewed for correctness and minimal surface area. This change does not introduce user-facing changes but improves the integrity of metrics shown in the UI, reducing the risk of misinterpretation in dashboards and reports. Closes #53218 from jiwen624/makeNegative-arg-order. Authored-by: Eric Yang; Signed-off-by: Wenchen Fan.
November 2025
1 Commits
Nov 1, 2025Month: 2025-11 — Focused on improving correctness and reliability of Spark's status metrics in the UI. Delivered a targeted bug fix in apache/spark that corrects the argument order in the createMetrics call within LiveEntityHelpers.makeNegative, ensuring accurate negation of metrics across shuffled metric categories. The patch (commit a75815e7b7e79a01cae9b595842aae5328e809be) aligns with SPARK-54505, includes a new unit test, and was reviewed for correctness and minimal surface area. This change does not introduce user-facing changes but improves the integrity of metrics shown in the UI, reducing the risk of misinterpretation in dashboards and reports. Closes #53218 from jiwen624/makeNegative-arg-order. Authored-by: Eric Yang; Signed-off-by: Wenchen Fan.
Activity
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Quality Metrics
Correctness100.0%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Scala
Technical Skills
Apache SparkScalabackend developmentunit testing
Repositories Contributed To
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