Red Hat Bugzilla – Bug 478760
Host lookup fails after suspend
Last modified: 2009-12-18 02:29:11 EST
Description of problem:
Host lookup is failing after suspend to ram, affecting at least privoxy. This is a new regression in glibc-2.9-3.x86_64, glibc-2.9-2.x86_64 and prior are working correctly.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Privoxy is installed and gnome is configured to it.
2. Suspend to RAM
3. Resume from RAM
4. Network manager reconnects to wireless
5. Use epiphany to view a web site
All websites fail in epiphany with privoxy saying host not found
Website should appear as normal.
The only way to fix privoxy appears to be restart it. All DNS lookups fail, even ones not previously tried.
privoxy hasn't changed in ages, glibc upgrade caused the problem and reverting it fixed the problem. Strace output to be attached, shows that glibc is not even attempting to look in /etc/resolv.conf after suspend, thus causing the lookup failure.
Created attachment 328146 [details]
strace of privoxy after resume showing bad hostname lookups
Created attachment 328147 [details]
strace of privoxy before resume showing good hostname lookups
From the RPM changelog there's a bunch of suspects for hostname lookup breakage in this release of glibc:
# rpm -qp --changelog glibc-2.9-3.x86_64.rpm|head
* Mon Dec 08 2008 Jakub Jelinek <firstname.lastname@example.org> 2.9-3
- temporarily disable _nss_dns_gethostbyname4_r (#459756)
- NIS hostname lookup fixes (#473073, #474800, BZ#7058)
Has anyone looked at this? This was broken by a stable update to Fedora 10 and the same regression is present in current rawhide, so Fedora 11 will be broken too.
Created attachment 357671 [details]
Patch from openSUSE
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