Hi, I found the culprit which was avahi-daemon... By disabling avahi-daemon, gethostbyaddr() (and similarly getnameinfo()) returns instantaneously. I wonder whether avahi-daemon is enabled by default in distributions like Debian and Fedora. From this page (http://avahi.org/wiki/AboutAvahi#Distributions) it seems that avahi is included in those distributions. Maybe it is a matter of configuration then. Regards, Babis P.S.: Thank you Rémy for suggesting strace. It is a very helpful command. On Mon, Dec 12, 2011 at 1:48 PM, Charalampos Nikolaou <charnik@di.uoa.gr> wrote:
Same behavior.
Babis
On Mon, Dec 12, 2011 at 12:16 PM, Stefan de Konink <stefan@konink.de> wrote:
Can you also check what happens if you add to /etc/resolv.conf:
options single-request
(Just to exclude it is not some form of glibc 2.10+ dns/firewall issue.)
Stefan