[Bug 403411] [NEW] firefox completely freezes up for 30 seconds on DNS server down
Gavin McCullagh
gmccullagh at gmail.com
Thu Jul 23 09:00:00 UTC 2009
Public bug reported:
Binary package hint: firefox-3.0
Hi,
looking at this page on the wiki yesterday,
https://help.ubuntu.com/community/UbuntuLTSP?action=recall&rev=139
the logo image which has address
http://logicalnetworking.net/other/wiki/ltsp.jpg
was causing problems as it seems its DNS server was down. I watched the
tcpdump and watched 40 seconds of request for an A record, 8-10 seconds,
then a SERVFAIL, then that process 2-3 times more. All through this
30-40 seconds, firefox was completely frozen with the screen not even
repainting.
This issue probably only happens where a DNS server is down (ie where
you get to wait for a SERVFAIL as opposed to a NXDOMAIN which would
happen quickly), but it's pretty awful when it happens.
I suspect the issue is probably an upstream one but I'm putting it here
first in case there's a patch or setting in the ubuntu packaging which
is causing it.
Gavin
** Affects: firefox-3.0 (Ubuntu)
Importance: Undecided
Status: New
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firefox completely freezes up for 30 seconds on DNS server down
https://bugs.launchpad.net/bugs/403411
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