Worked on the apache/rocketmq repository to enhance the robustness of the PullMessageService by addressing a critical error handling issue. Focused on improving thread resilience, the developer modified the service’s exception handling logic to catch Throwable instead of only Exception, ensuring that severe errors like OutOfMemoryError are properly logged and do not terminate essential threads. This targeted bug fix improved observability by capturing errors in logs and metrics, facilitating faster diagnosis of failures in high-traffic message pulling. The work was implemented in Java, emphasizing strong error handling and multi-threading skills, and was delivered with minimal production risk and no API changes.