Month: 2025-08 | Project: apache/pulsar | Focus: stability and reliability improvements (no new features delivered this month). Overall summary: - No new features released in August 2025 for apache/pulsar. The month was focused on fixing a critical failover bug, updating tests, and tightening reliability of the failover path. Key achievements: - Fixed ArrayIndexOutOfBoundsException in SameAuthParamsLookupAutoClusterFailover by correcting loop condition in findFailoverTo; prevents runtime errors during failover. - Updated test case comment to reflect corrected failover target. - Committed fix in 95dcb583060539bb62cbb9fb1bf5b16aca6f408b with message [fix][client] fix ArrayIndexOutOfBoundsException in SameAuthParamsLookupAutoClusterFailover (#24662). - Improved reliability of Pulsar failover path, reducing downtime risk. Technologies/skills demonstrated: - Java, Pulsar client/failover logic, defensive programming, test-driven fixes, descriptive commit messages, and end-to-end validation of failover safety. Business value: - Prevents runtime failures during failover, improves stability in production, and reduces potential downtime for clients relying on Apache Pulsar.

July 2025: Delivered conditional read support for the Cos service in Apache OpenDAL, enabling HTTP If-Modified-Since and If-Unmodified-Since headers so clients fetch data only when changed. This reduces unnecessary data transfer and improves cache efficiency for Cos-backed workloads. Implemented in core/src/services/cos/backend.rs and core/src/services/cos/core.rs. Associated commit 93a09ca35f1db61693c26a4a305cb4f41589e5ca: feat: Conditional reader for cos (#6424). This work enhances performance and lays groundwork for broader conditional read capabilities across services.