Hi Arrow Community,
I've discovered a critical regression bug in the Java Flight module affecting versions 16.0.0, 17.0.0, and 18.0.0. **Issue**: FlightClient fails to initialize with Unix Domain Sockets (UDS) + Epoll, throwing: `ClassCastException: EpollDomainSocketChannel cannot be cast to ServerChannel` **Status**: - Broken in: v16, v17, v18 - Working in: v15 and earlier - Root Cause: Incorrect casting in internal Netty/gRPC logic (EpollDomainSocketChannel vs ServerChannel). I have already filed a detailed JIRA here: https://github.com/apache/arrow/issues/49396 including reproduction steps and code analysis. Since this breaks UDS support for the last three major releases, could any Java/Flight committers please take a look? Thanks.
