Worked on enhancing serialization compatibility for unmodifiable collections in the crossoverJie/starrocks repository, focusing on Java 17 readiness. Addressed a critical bug by replacing the deprecated UnmodifiableCollectionsSerializer with a version compatible with Java 17, ensuring that serialization of unmodifiable collections remains functional for users upgrading their environments. The approach maintained backward compatibility and reduced potential runtime failures, supporting a smoother transition for projects relying on unmodifiable wrappers. Leveraged expertise in Java and serialization to update the serialization layer, minimizing future maintenance risks and support overhead. The work demonstrated a methodical approach to software development, prioritizing stability and long-term maintainability.