During this period, contributed to the apache/iceberg repository by enhancing observability in the Parquet reader component. Developed a feature in Java that logs corrupted filenames when decoding errors occur, improving traceability of faulty data sources. This involved introducing a dedicated logger and updating the FileIterator.next() method to catch ParquetDecodingException and record the specific file causing the issue. The approach focused on robust error handling and logging, enabling faster root-cause analysis for data quality incidents in large-scale data engineering environments. The instrumentation was designed to be non-intrusive, ensuring that data processing semantics and runtime stability remained unaffected throughout deployment.