Worked on enhancing process termination reliability in the apache/dolphinscheduler repository by developing a robust multi-stage termination strategy for the Cancel Application feature. The approach introduced sequential signal handling—SIGINT, SIGTERM, and SIGKILL—to ensure consistent process shutdown across diverse environments. Logging was updated to improve observability, capturing detailed lifecycle and failure events for easier troubleshooting. Unit testing was expanded to cover the new logic, increasing regression safety and code coverage. The targeted changes, implemented in Java and focused on backend development and error handling, improved maintainability and clarity while reducing the risk of incomplete terminations in the process management workflow.