Worked on the apache/solr repository to enhance distributed file storage and data processing reliability. Focused on backend development using Java, the work involved removing the SolrClientCache from DistribFileStore and adopting the default HTTP Solr client, which streamlined client management and improved maintainability. Addressed error handling by fixing a NullPointerException in the size estimator, ensuring robust processing of null-valued fields and preventing runtime crashes. All changes were clearly documented with references to relevant SOLR issues, supporting traceability and future audits. Emphasized API integration and unit testing throughout, delivering targeted improvements that strengthened the repository’s operational stability and maintainability.