[Pdns-users] Strange issue with RedHat EL6 and recursor 3.3

Aki Tuomi cmouse at youzen.ext.b2.fi
Thu Sep 15 05:38:06 UTC 2011

I'm having an issue where resolving in application takes long time. It only
seems to affect gethostbyname() but not, for example, if one does dig. 

I've used this as test 

wget http://pkgs.repoforge.org/perl-Task-Weaken/perl-Task-Weaken-1.03-1.el6.rfx.noarch.rpm

which results into spending almost 20 seconds in resolving the redirects. If 
those redirects are manually resolved using dig, it takes milliseconds. 

RedHat supports only comment on this issue is that it is pdns fault, and they
suggest as workaround to use this in /etc/resolv.conf:

options single-request-reopen

when that is used, resolving works normally. Any ideas are greatly appreciated.

Aki Tuomi
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