Worked on enhancing the reliability of service discovery within the apache/incubator-seata project by addressing a critical bug in the NacosRegistry integration. Focused on improving stability, the developer implemented a targeted fix in Java to prevent a NullPointerException that occurred when the transactionServiceGroup was empty during registry lookups. By refining the conditional logic, the solution ensured that removeOfflineAddressesIfNecessary was only invoked when appropriate, thereby reducing error-prone paths in distributed transaction coordination. This work demonstrated careful code path isolation and a strong understanding of Nacos and service discovery mechanisms, contributing to more robust runtime behavior without introducing unrelated changes.