January 2026 focused on security hardening and dependency management for pentaho-platform. The primary delivery was removing a vulnerable Apache POI 5.2.5 and upgrading libraries to newer versions, strengthening the platform against CVEs and improving maintainability for future upgrades. The work aligns with ongoing security standards and sets a solid baseline for dependency management across the repository.

December 2025 monthly summary: Security-focused dependency hardening across two core Pentaho repositories, with all work centered on reducing risk from third-party libraries and improving stability for Excel processing. No new features were released; the emphasis was on vulnerability remediation, reliability, and maintainability. Delivered targeted POI updates and related dependency adjustments to align with security best practices and upgrade cycles. Key activities included updating Apache POI to a secure version and ensuring compatibility with supporting libraries, alongside cross-repo coordination for safe rollouts and traceability.

Month: 2025-11 — Key deliverable: Multiway Merge Join for Data Transformation in pentaho/pentaho-kettle. Implemented Multiway Merge Join functionality to merge multiple input streams based on specified keys, enabling more flexible and scalable data transformation pipelines in ETL workflows (Backlog item BACKLOG-45484, target version 11.1). This reduces the need for custom scripting and improves maintainability of complex transforms. Overall impact includes expanded transformation capabilities, improved data flow flexibility, and readiness for upcoming phased rollouts.

In August 2025, focused on stabilizing Excel export workflows in Pentaho Server. Resolved a critical NoClassDefFoundError by correctly aligning the SparseBitSet dependency for the Excel Writer step (.xls) with the 'shift existing cells down' setting. The fix eliminates production failures, reduces support load, and strengthens deployment reliability for scheduled reporting. This update reinforces dependency management and build hygiene across the Pentaho Platform.

April 2025 monthly summary: Delivered a security remediation and dependency-governance upgrade in the Maven parent POMs. Upgraded the Snowflake JDBC dependency from 3.14.1 to 3.23.1 via dependency management in pentaho/maven-parent-poms to address a known vulnerability. No code changes were required, preserving stability while improving security posture and vendor compliance. The change is scoped to the Maven parent project and linked to PPP-5582 (commit 9ec15914c6e149a6962b957e3700070ccae30421).

March 2025 monthly delivery focused on security and reliability improvements across two Pentaho components. Key changes include upgrading json-smart in pentaho/maven-parent-poms from 2.5.0 to 2.5.2 to mitigate security vulnerabilities and improve JSON processing performance, and implementing robust resource management in pentaho/pentaho-scheduler-plugin by closing streams in Local VFS I/O and removing redundant closures in ActionRunner to fix file locking and resource leaks. These changes reduce security risk, prevent OS-level file locks, and strengthen scheduler stability with clearer change trace.

February 2025 performance summary focusing on reliability improvements and security hardening across core Pentaho repos. Delivered targeted fixes that reduce data-processing friction for large Excel workloads and strengthened the security posture of dependencies critical to cloud data workflows. Key outcomes include improved Excel file handling in the Excel Input step and a critical security patch for Snowflake JDBC, both aligned with ongoing effort to improve stability, scalability, and risk management for customer deployments.

Concise monthly summary for 2024-11 focused on security and stability improvements in pentaho/maven-parent-poms through a GRPC patch and dependency updates, with added traceability and minimal surface for production risk.