apache/hadoop
Dec 2024 – May 2025
3 Months active
Languages Used
Java
Technical Skills
Backend DevelopmentDistributed SystemsJavaYARNConcurrencyPerformance Optimization
Tao Yang
PROFILE
Tao Yang
Tao Yang enhanced the reliability and performance of apache/hadoop’s YARN ResourceManager by addressing concurrency and stability challenges in Java. He implemented an uncaught exception handler for asynchronous scheduling threads, preventing scheduler hangs and ensuring continuous operation during fault conditions. Tao refactored the scheduler’s request pre-check logic to reduce redundant node checks, improving scheduling cycle efficiency, and replaced a non-thread-safe HashMap with a ConcurrentHashMap in the metrics cache to eliminate race conditions. He also stabilized CapacityScheduler tests by introducing deterministic waiting mechanisms, improving CI reliability. His work combined backend development, distributed systems expertise, and rigorous unit testing to strengthen system resilience.
Overall Statistics
Feature vs Bugs
25%Features
Repository Contributions
4Total
Bugs
3
Commits
4
Features
1
Lines of code
405
Activity Months3
Your Network
688 people
Work History
May 2025
1 Commits
May 1, 2025May 2025 monthly summary for apache/hadoop: Focused on stabilizing tests for the CapacityScheduler and preserving core logic. Implemented a test-only stability improvement that significantly reduces flaky failures in multi-node scenarios without touching production code.
1 Commits
May 1, 2025May 2025 monthly summary for apache/hadoop: Focused on stabilizing tests for the CapacityScheduler and preserving core logic. Implemented a test-only stability improvement that significantly reduces flaky failures in multi-node scenarios without touching production code.
May 2025
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for apache/hadoop focusing on reliability improvements and performance optimization in YARN. Delivered two critical items supported by added tests and measurable performance impact.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for apache/hadoop focusing on reliability improvements and performance optimization in YARN. Delivered two critical items supported by added tests and measurable performance impact.
December 2024
1 Commits
Dec 1, 2024December 2024 (apache/hadoop): Focused reliability hardening for YARN ResourceManager. Delivered an uncaught exception handler for asynchronous scheduling threads to prevent scheduler hangs, ensuring continuous RM operation under fault conditions. Added tests validating behavior during RM failover and simulated exceptions to strengthen resilience across failover events and error scenarios. Commit aa5fe6f550c8971762c02c292240a7529001e1d8 (YARN-10058) included as the primary contribution.
1 Commits
Dec 1, 2024December 2024 (apache/hadoop): Focused reliability hardening for YARN ResourceManager. Delivered an uncaught exception handler for asynchronous scheduling threads to prevent scheduler hangs, ensuring continuous RM operation under fault conditions. Added tests validating behavior during RM failover and simulated exceptions to strengthen resilience across failover events and error scenarios. Commit aa5fe6f550c8971762c02c292240a7529001e1d8 (YARN-10058) included as the primary contribution.
December 2024
Activity
Loading activity data...
Quality Metrics
Correctness95.0%
Maintainability90.0%
Architecture85.0%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
Backend DevelopmentConcurrencyDistributed SystemsJavaPerformance OptimizationResource ManagementScheduler DesignTestingUnit TestingYARN
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline