[Bug 1752411] Re: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck
In https://bugs.launchpad.net/ubuntu/+source/bind9/+bug/1797926 looks like the host command, that doesn't timeout and is the subject of this bug here, crashed. -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1752411 Title: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1752411/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1752411] Re: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck
** Tags removed: server-next -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1752411 Title: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1752411/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1752411] Re: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck
It should probably also check for 127.0.0.53, not just 127.0.0.1 ** Also affects: avahi (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=898038 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to bind9 in Ubuntu. https://bugs.launchpad.net/bugs/1752411 Title: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1752411/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1752411] Re: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck
I think that time is past, we were in beta freeze in the past week, and are in final freeze now. Unless there is a clear test case showing under which conditions this happens and how widespread it is, it's probably best to start thinking in SRU terms. It looks like a safe change, but since I don't understand the problem entirely yet (when it happens, why), I can't say. -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to bind9 in Ubuntu. https://bugs.launchpad.net/bugs/1752411 Title: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1752411/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1752411] Re: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck
Some troubleshooting I did with Trent today showed: a) the "host -t soa local." call triggered a query to 127.0.0.53 as expected, network-wise, which got a response right away b) we snapshotted ip route and ip addr just before the host call, and saw that the interface responsible for the default route (and route to his dns server) was still down. I wonder if dns_reachable() in /usr/lib/avahi/avahi-daemon-check-dns.sh is doing the right thing. It looks for 127.0.0.1 (and not 127.0.0.53), and, failing that, for a default route. The default route exists, but the link it goes through is still down: 2: eno1: mtu 1500 qdisc fq_codel state DOWN group default qlen 1000 default via x.x.x.x dev eno1 onlink linkdown -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to bind9 in Ubuntu. https://bugs.launchpad.net/bugs/1752411 Title: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1752411/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1752411] Re: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck
Can you try running "host" with -d in the scenario where it is hanging? Also, a fresh bionic system shouldn't run the ifup-down scripts, since it uses netplan. Unless openconnect or one of its dependencies pull it in explicitly. A quick apt-cache rdepends didn't see it. -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to bind9 in Ubuntu. https://bugs.launchpad.net/bugs/1752411 Title: bind9-host, avahi-daemon-check-dns.sh hang forever causes network connections to get stuck To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1752411/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs