"...has had Unix fds pending for too long (pending_fd_timeout=xxxms); tolerating it, because it has uid 0" was outputted in syslog.

Issue

• Customer found these messages in the server:

Jul  6 10:15:24 xxx dbus[1022]:warning: [system] Connection ":1.2" (uid=0 pid=1169 comm="/usr/lib/systemd/systemd-logind ") has had Unix fds pending for too long (pending_fd_timeout=150000ms); tolerating it, because it has uid 0
Jul  6 10:19:48 xxx dbus[1022]:warning: [system] Connection ":1.2" (uid=0 pid=1169 comm="/usr/lib/systemd/systemd-logind ") has had Unix fds pending for too long (pending_fd_timeout=150000ms); tolerating it, because it has uid 0
Jul  6 10:29:27 xxx dbus[1022]:warning: [system] Connection ":1.2" (uid=0 pid=1169 comm="/usr/lib/systemd/systemd-logind ") has had Unix fds pending for too long (pending_fd_timeout=150000ms); tolerating it, because it has uid 0

• Customer can reproduce this after 60 ~ 70 quick successive login attempts.