Hello,
as per the report from sagaxu on discourse: https://discourse.haproxy.org/t/listen-socket-closed-after-reloading-by-sigusr2/1925 It appears master-worker reload (USR2 to the master process) is currently broken. When sending USR2 to the master process, all sockets are closed and while a worker is forked successfully, it does not work as it will never have any sockets connected to it. The bug has been introduced in commit baf6ea4b (" BUG/MINOR: mworker: detach from tty when in daemon mode") and affects 1.8.1 and newer stable releases. The discourse-OP also states that the socket is likely closed by the triple flcose() introduced in that bisected commit. I'm not sufficiently familiar with the mworker and expected forking/stdin/stdout/stderr behavior to be able to suggest a fix, but I can confirm the issue is easily reproducible post-baf6ea4b. Best regards and merry xmas! Lukas
