Public bug reported:
I am running Ubuntu 16.10 (from a base install upgraded several times),
with proposed-updates enabled. Recently, I started having problems where
I am unable to resolve irc.freenode.net.
This is unrelated to the networks. I have been able to confirm that
systemd-resolved is able to perform the name resolution. Yet,
getaddrinfo() call returns -EAI_AGAIN error.
This can be reproduced using getent:
> $ getent ahosts irc.freenode.net
> $
While testing v4 or v6 directly returns something valid:
> $ getent ahostsv4 irc.freenode.net
> 38.229.70.22 STREAM chat.freenode.net
> 38.229.70.22 DGRAM
> 38.229.70.22 RAW
> 130.239.18.119 STREAM
> 130.239.18.119 DGRAM
> 130.239.18.119 RAW
[...]
> $
> $ getent ahostsv6 irc.freenode.net
> 2001:5a0:3604:1:64:86:243:181 STREAM chat.freenode.net
> 2001:5a0:3604:1:64:86:243:181 DGRAM
> 2001:5a0:3604:1:64:86:243:181 RAW
> 2001:6b0:e:2a18::118 STREAM
> 2001:6b0:e:2a18::118 DGRAM
> 2001:6b0:e:2a18::118 RAW
[...]
> $
dpkg.log shows there has been some upgrade of systemd recently, though I
cannot tell for sure if that directly relates to the problem, I do use
suspend-to-ram a lot and reboot not that often.
> $ lsb_release -a
> LSB Version:
> core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:printing-9.20160110ubuntu5-amd64:printing-9.20160110ubuntu5-noarch:security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch
> Distributor ID: Ubuntu
> Description: Ubuntu 16.10
> Release: 16.10
> Codename: yakkety
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: Confirmed
** Package changed: glibc (Ubuntu) => systemd (Ubuntu)
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https://bugs.launchpad.net/bugs/1665394
Title:
DNS resolution of irc.freenode.net or chat.freenode.net fails
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