firefox hangs while trying to resolve hosts

[Joe Marcus Clarke]

On Sun, 2004-03-07 at 03:11, Tom McLaughlin wrote:
> Hi all, I've been having some problems with firefox (mozilla appears to
> do this as well) on certain websites with them taking significant
> periods of time for their address to be resolved.  This doesn't seem to
> be a network issue on my end since while a site is hanging on this
> machine, I can bring up the same page on my openbsd machine running
> firebird 0.6 almost instantaneously.  What I've done is create a few
> packet captures with ethereal for a site that hangs firefox a lot
> (www.allmusic.com)[1], a site that generally doesn't hang
> (www.freebsd.org)[2], and the site that hangs on freebsd but not on
> openbsd[3].
> 
> What I noticed is in [1] multiple type AAAA queries are made which
> eventually receive back a "Server failure" response and then an ICMP
> unreachable packet.  A type A query is finally made after some time
> which responds fine.
> 
> In [2] the type AAAA query is responded to fine and then there is a type
> A query.
> 
> In [3] there are only type A queries made.
> 
> Something more is that if I click stop in firefox as a site is hanging
> and then try to go to another site I will still see dns queries for the
> hanging site continued to be made.  Eventually those will stop and I
> will start seeing queries for the new site.  Please let me know if I can
> provide anything more.  I didn't have this problem in 0.7.  Thanks.

This sounds an awful lot like
http://bugzilla.mozilla.org/show_bug.cgi?id=70213 which should have been
fixed for 1.6.  Firebird 0.7 was based on 1.6a where this fixed first
showed up, so perhaps they've regressed.  You might try reopening this
bug with your new data.

In the meantime, if you're not using IPv6, try either removing INET6
from your kernel, or setting net.inet6.ip6.auto_linklocal to 0 in
/etc/sysctl.conf and rebooting.

Joe

> 
> Tom
> 
> OS: 4.9-RELEASE-p3
> IP: 192.168.1.128 (fbsd), 192.168.1.129 (obsd)
> DNS: 204.127.204.8, 216.148.227.204
> 
> [1] http://tmclaugh.freeshell.org/files/www.allmusic.com.pcap
> [2] http://tmclaugh.freeshell.org/files/www.freebsd.org.pcap
> [3] http://tmclaugh.freeshell.org/files/www.allmusic.com-obsd.pcap
> (I've scrubbed out a bit of the unrelated network noise in all three.)
> 
> 
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