June 2025 monthly summary for pentaho/pentaho-kettle: Delivered a plugin-based execution engine architecture with Spark addon integration, enabling modular execution engines and plugin-driven run configurations. Refactored core to support external providers via new factory and manager components, and decoupled Spark execution into a dedicated addon. Updated run configuration system to better integrate with plugins. Committed [BACKLOG-42787] to move AEL code to the enterprise plugin, aligning with the plugin strategy and improving maintainability.

In March 2025, delivered a security-focused dependency upgrade for the Pentaho Kettle project, upgrading commons-io to 2.16.1 in the PDI Core Plugin to remediate a vulnerability and reduce risk exposure. The change was implemented with minimal footprint and validated against existing workflows, ensuring compatibility and stability.

February 2025 focused on security hardening and stability of the Big Data stack in pentaho-hadoop-shims. Upgraded the Parquet-Hadoop bundle to address critical vulnerabilities in the Apache driver component, ensuring the latest build no longer includes the vulnerable library and aligning with security remediation tickets PPP-5540 and PPP-5622. Verified build integrity and compatibility to minimize risk in production deployments.

January 2025 monthly summary for pentaho/pentaho-hadoop-shims focusing on security remediation and dependency management across Hadoop distributions. Completed a critical Jackson-databind upgrade to version 1.14.4 to mitigate known vulnerabilities across parquet-hadoop-bundle-1.11.1.jar and multiple distributions, ensuring consistency and reducing downstream risk.

December 2024 monthly work summary for pentaho/pentaho-kettle focusing on PVFS variable substitution reliability and test coverage. Delivered a critical bug fix to PVFS variable replacement initialization and established test infrastructure to support variable substitution scenarios.

Nov 2024 monthly summary for pentaho/pentaho-scheduler-plugin: Focused maintenance work to improve test reliability without altering functional behavior. Delivered an OSGi Core Test Version Information Update to enhance test robustness and traceability. This minor cleanup reduces flaky tests and helps CI stability, with no user-facing feature changes.