Worked on the milvus-io/milvus repository to enhance backend reliability by addressing a critical bug in schema-altering operations. Developed resource group validation for AlterCollection and AlterDatabase, ensuring that operations referencing non-existent resource groups no longer trigger infinite retries or hangs. This solution involved implementing a ShowResourceGroups method in the Broker interface, integrating a validation helper within RootCoord, and updating DDL callbacks to surface clear errors when resource groups are missing. Leveraged Go for backend development and comprehensive unit testing, ultimately reducing operational risk and improving error transparency for clients during database schema changes and resource allocation workflows.