Worked on the apache/hadoop repository to address Windows compatibility issues related to temporary directory creation in Hadoop’s createWorkDirectory method. Focused on enhancing cross-platform reliability, the developer implemented a fix that uses ACL-based permissions when POSIX permissions are unavailable, ensuring directories are created reliably on Windows systems. Leveraging Java and Java NIO for file system operations, the work included adding targeted tests to verify correct behavior and prevent regressions specific to Windows environments. This contribution improved enterprise deployment stability and clarified future maintenance needs by refining permission handling logic and strengthening test coverage for Windows file system scenarios in Hadoop.