Worked on backend reliability improvements for the apache/felix-dev project, focusing on Jetty’s JMX lifecycle management using Java and OSGi. Addressed a persistent JMX MBean leak that occurred during Jetty restarts by ensuring all MBeans were unregistered before the server shutdown process. This involved updating the MBeanServerTracker logic to call destroy methods and adjust cleanup timing, preventing stale MBean registrations from persisting across restarts. The solution eliminated InstanceAlreadyExistsException errors on subsequent startups, directly improving restart reliability and reducing downtime. The work demonstrated a methodical approach to backend maintenance, emphasizing robust resource management and lifecycle handling within Java-based server environments.