Worked on stabilizing the group commit path in the Jibing-Li/incubator-doris repository, focusing on backend development and bug fixing using C++ and Groovy. Addressed a critical issue by refining error handling during group commit operations, which improved error reporting and enabled faster diagnosis of failures. Enhanced fault injection testing by updating test parameters to better simulate real-world failure scenarios, thereby increasing test coverage and reliability under high-throughput conditions. These changes contributed to reduced ambiguity in error states and aligned testing practices with production environments, ultimately supporting smoother deployments and fewer incidents in operational workflows for the project.