Worked on the apache/gravitino repository to address a backend validation issue, focusing on improving error handling for the DistributionDTO component. The contribution involved correcting the error message related to bucket number validation, ensuring it accurately reflected the underlying logic that permits values greater than or equal to -1. This adjustment aimed to reduce user confusion and align API feedback with actual validation rules, potentially lowering support requests. The solution was delivered as a single Java commit, with corresponding test updates to verify the change. The work demonstrated attention to backend development details and a methodical approach to user experience improvements.