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Shen Liu

PROFILE

Shen Liu

Liushen focused on backend development and distributed systems, contributing targeted bug fixes to the apache/bookkeeper and Pulsar repositories over a two-month period. In apache/bookkeeper, Liushen addressed a region-aware placement policy issue by ensuring disk weight updates correctly propagated to sub-policies, improving cross-region data placement accuracy and reducing data skew. For both datastax/pulsar and apache/pulsar, Liushen resolved subscription prefix mismatches in the MultiRolesTokenAuthorizationProvider, aligning authorization behavior for single and multiple roles across repositories. The work demonstrated careful code maintenance, test-driven development, and collaboration, utilizing Java and unit testing to enhance system reliability and deployment stability.

Overall Statistics

Feature vs Bugs

0%Features

Repository Contributions

3Total
Bugs
3
Commits
3
Features
0
Lines of code
331
Activity Months2

Your Network

117 people

Work History

January 2026

2 Commits

Jan 1, 2026

January 2026 monthly summary focused on strengthening authorization reliability in Pulsar by delivering cross-repo fixes for the MultiRolesTokenAuthorizationProvider. The work centers on aligning behavior for subscription prefix handling across two major repositories (datastax/pulsar and apache/pulsar) and ensuring correct authorization for both single and multiple roles. The fixes were implemented via upstream-aligned commits and cherry-picks, enhancing deployment stability and security.

February 2025

1 Commits

Feb 1, 2025

February 2025 (2025-02) monthly summary for apache/bookkeeper focusing on region-aware placement policy improvements and test coverage.

Activity

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Quality Metrics

Correctness100.0%
Maintainability86.6%
Architecture86.6%
Performance86.6%
AI Usage20.0%

Skills & Technologies

Programming Languages

Java

Technical Skills

Backend DevelopmentDistributed SystemsJavabackend developmentunit testing

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

apache/bookkeeper

Feb 2025 Feb 2025
1 Month active

Languages Used

Java

Technical Skills

Backend DevelopmentDistributed SystemsJava

datastax/pulsar

Jan 2026 Jan 2026
1 Month active

Languages Used

Java

Technical Skills

Javabackend developmentunit testing

apache/pulsar

Jan 2026 Jan 2026
1 Month active

Languages Used

Java

Technical Skills

Javabackend developmentunit testing