Date: Wed, 20 Jan 2010 20:03:22 +0300 From: "K.R." <spambox@haruhiism.net> To: FreeBSD Current <freebsd-current@freebsd.org> Subject: 8.0-STABLE r200182: weird behaviour of a service in a jail Message-ID: <4B57375A.4000309@haruhiism.net>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I'm running FreeBSD 8.0-STABLE #0 r200182: Mon Dec 7 03:32:18 JST 2009 SMP (4 cores) with an uptime of ~44 days and starting about 1.5 weeks ago, I've noticed a weird behaviour with a jailed ircd (a hybrid spin-off); it listens on a cloned address on lo0 and the connections to it are redirected by pf. Everything was fine until once I noticed that I (and other users, of course) cannot connect to the irc server - the connection is established but then it just hangs indefinitely. This problem has never manifested itself on 7.0-STABLE and 7.2-STABLE on a single core system (ircd was also running inside a jail there). It looks like this from the outside: % telnet irc.server.here 6667 Trying (ip address here)... Connected to irc.server.here. Escape character is '^]'. And that's it; normally I'd get "439 * :Please wait while we process your connection." Same with another - server link - port. If I attempt to connect to the server's "real" listening IP from the machine running ircd, however, I get % telnet irc.server.here 6667 Trying (ip address here)... Connected to irc.server.here. Escape character is '^]'. Connection closed by foreign host. (immediately, with no pause) And on the server link port, it's still the same indefinite wait. Amusingly enough, a simple REHASH - which resets ircd's listening sockets - fixes the problem. The developers of the ircd state that this behaviour is unexpected and there's nothing wrong with the source code on their end (which I can believe). The ircd uses kqueue, if it matters. There are no abnormalities with sshd and sendmail in the same jail. No problems ever arised in the 5 other jails running HTTP, SMTP and other services; but that might be because ircd's load is much bigger in terms of total number of established connections. How should I debug this issue? For now, I've moved the jail to an external IP address to see if the problem persists. - -- Kamigishi Rei KREI-RIPE -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) iQEcBAEBAgAGBQJLVzdTAAoJEPAgyqbDpP+efJUIAKB9MJgLiTnlQYkPnLXCqroG fQqSilPODsztqkRc9MbbDLhUjk0PtBO/hFEIUrv2fUqOBbbf/H8TSRn7BdQuYUVU 6PsBrl+/e/jhP6y8wRsNudijlE1cQfxsjFJoNnoEHFKBY//6SedvMwMvxTy96CHf WOkBnNJVUt/YB/Fq/DdZtNUlZpOWxxtGWHf/C75q5IdGfjk6R3uLABazUhIGHJoK We/3gG2IVTf3zzKgCPwDaj3sLYQ1wkP4rOoAQjU+3pLynnR3xnQzv3XG2MtX3xEf bFh2RrN/0ufoNgUDJeEVptJDveTYbpHIzCm9iVkETM7Tv0A/CSzIwy6QMbB/eIU= =y1oH -----END PGP SIGNATURE-----
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