apache/ranger
Nov 2024 – May 2026
6 Months active
Languages Used
Java
Technical Skills
AuthorizationBackend DevelopmentConfiguration ManagementHDFSHive IntegrationAccess Control
Mahesh Bandal
PROFILE
Mahesh Bandal
Over six months, contributed to apache/ranger by focusing on backend development and access control, primarily using Java. Addressed complex authorization and policy evaluation issues, such as refining directory deletion checks to ensure correct permissions in hierarchical HDFS structures and stabilizing Hive authorization by improving owner resolution logic. Enhanced API reliability by improving error handling in user update endpoints and strengthened data security by preventing table renames when sensitive policies are active. Introduced time-based validity checks for dataset policies in the GDS module, aligning policy enforcement with access times. Emphasized robust, policy-driven security and reliable backend operations throughout all contributions.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
7Total
Bugs
7
Commits
7
Features
0
Lines of code
72
Activity Months6
Your Network
758 peopleSame Organization
@apache.org712
a.huberMember
Akira AjisakaMember
Andrzej BiałeckiMember
Arturo BernalMember
Abhishek KumarMember
Attila BukorMember
VampireAchaoMember
Abhishek ChennakaMember
Andreas DangelMember
Work History
May 2026
1 Commits
May 1, 2026Month: 2026-05 — Focused on stabilizing and improving the GDS policy evaluation path in the apache/ranger repository. Implemented time-based validity for dataset policies and fixed an underlying issue affecting access evaluations, strengthening policy relevance and security posture.
1 Commits
May 1, 2026Month: 2026-05 — Focused on stabilizing and improving the GDS policy evaluation path in the apache/ranger repository. Implemented time-based validity for dataset policies and fixed an underlying issue affecting access evaluations, strengthening policy relevance and security posture.
May 2026
November 2025
1 Commits
Nov 1, 2025November 2025: Delivered a critical bug fix in Apache Ranger that strengthens data governance by preventing renaming of tables with active row filters or column masking policies, thus preserving policy integrity during schema changes and enhancing security posture across RANGER deployments.
November 2025
1 Commits
Nov 1, 2025November 2025: Delivered a critical bug fix in Apache Ranger that strengthens data governance by preventing renaming of tables with active row filters or column masking policies, thus preserving policy integrity during schema changes and enhancing security posture across RANGER deployments.
September 2025
1 Commits
Sep 1, 2025Monthly summary for September 2025 (2025-09): Focused on stability and security for apache/ranger. Key features delivered: none this month; Major bugs fixed: fixed File Hierarchy Access Check bug (RANGER-5294) by adding the missing 'recurse' parameter to FileUtils.isOwnerOfFileHierarchy, wiring it into isURIAccessAllowed, and introducing enhanced performance logging for coarse URI checks. Impact: higher reliability of access checks, reduced security risk, and improved observability and performance for access-control paths. Technologies/skills demonstrated: Java code fixes, parameter propagation, enhanced logging, performance logging, and investigation of access-control paths; commit bc9b02972b349e5624db0fc8832a6703d890a8f9.
1 Commits
Sep 1, 2025Monthly summary for September 2025 (2025-09): Focused on stability and security for apache/ranger. Key features delivered: none this month; Major bugs fixed: fixed File Hierarchy Access Check bug (RANGER-5294) by adding the missing 'recurse' parameter to FileUtils.isOwnerOfFileHierarchy, wiring it into isURIAccessAllowed, and introducing enhanced performance logging for coarse URI checks. Impact: higher reliability of access checks, reduced security risk, and improved observability and performance for access-control paths. Technologies/skills demonstrated: Java code fixes, parameter propagation, enhanced logging, performance logging, and investigation of access-control paths; commit bc9b02972b349e5624db0fc8832a6703d890a8f9.
September 2025
April 2025
1 Commits
Apr 1, 2025April 2025 (apache/ranger) monthly summary focusing on business value and technical achievements.
April 2025
1 Commits
Apr 1, 2025April 2025 (apache/ranger) monthly summary focusing on business value and technical achievements.
January 2025
1 Commits
Jan 1, 2025January 2025: Focused on stabilizing Hive authorization ownership logic in RangerHiveAuthorizer to ensure correct application of owner-based policies and reduce authorization drift. Implemented a targeted fix that retrieves the owner from the objOwners map for databases and columns, with a safe fallback to the metastore, improving accuracy and policy reliability across Hive access paths.
1 Commits
Jan 1, 2025January 2025: Focused on stabilizing Hive authorization ownership logic in RangerHiveAuthorizer to ensure correct application of owner-based policies and reduce authorization drift. Implemented a targeted fix that retrieves the owner from the objOwners map for databases and columns, with a safe fallback to the metastore, improving accuracy and policy reliability across Hive access paths.
January 2025
November 2024
2 Commits
Nov 1, 2024November 2024—apache/ranger: Implemented critical authorization correctness improvements for directory deletion and updated governance records. Key changes include refactoring Ranger authorization logic to remove intermediary flags and directly evaluate policies, ensuring correct permissions in hierarchical directory structures (RANGER-4980). Administrative governance: added Mahesh Bandal to the committers. These efforts improve policy-driven access control, reduce risk of unintended deletions, and reinforce security posture in HDFS file operations.
November 2024
2 Commits
Nov 1, 2024November 2024—apache/ranger: Implemented critical authorization correctness improvements for directory deletion and updated governance records. Key changes include refactoring Ranger authorization logic to remove intermediary flags and directly evaluate policies, ensuring correct permissions in hierarchical directory structures (RANGER-4980). Administrative governance: added Mahesh Bandal to the committers. These efforts improve policy-driven access control, reduce risk of unintended deletions, and reinforce security posture in HDFS file operations.
Activity
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Quality Metrics
Correctness85.8%
Maintainability85.8%
Architecture82.8%
Performance82.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
Access ControlAuthorizationBackend DevelopmentConfiguration ManagementFile System OperationsHDFSHive IntegrationJavaJava DevelopmentPerformance Loggingaccess controlbackend developmentdata securitypolicy evaluation
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