NSCD, Fedora, and busted DNS

[Jon Masters]

Yo,

Working out a few things that bug me about Fedora apps and DNS (many).
Specifically, handling of a busted network connection (I often reboot
with a vpnc-afflicted resolv.conf remaining...). So far, I can see that
the initscripts don't really handle a connection that's semi-up but not
really. I guess this waits for upstart/whatever. Annoying, but ok.

But most randomly annoying today, an strace shows that the Rhythmbox
application[0] thinks it's a good idea to do a DNS lookup *every* time
one changes track...lovely. Really stupid.

We have NSCD installed on my F8T3, why is it not running by default?

[jcm@perihelion ~]$ sudo /etc/init.d/nscd status
nscd is stopped

Jon.

[0] I'm a die-hard XMMS fanboy, but I'm told I'm living in history and
should move with the times...like ditching use of cdrecord ;-)

[Bastien Nocera]

On Sun, 2007-10-21 at 20:30 -0400, Jon Masters wrote:
>  Yo, 
<snip>
>  But most randomly annoying today, an strace shows that the Rhythmbox
>  application[0] thinks it's a good idea to do a DNS lookup *every* time
>  one changes track...lovely. Really stupid. 
And what domain would that be? It wouldn't happen to be:
- Amazon.com (covers)
or
- one of the lyrics websites (lyrics plugin)
or
- audioscrobbler.com (for the last.fm functionality)

We're working upstream on making all those disabled if NetworkManager
doesn't see a network connection. See:
http://bugzilla.gnome.org/show_bug.cgi?id=322266

In the meanwhile, those lookups would be normal.

[Jon Masters]

On Mon, 2007-10-22 at 01:42 +0100, Bastien Nocera wrote:
>  On Sun, 2007-10-21 at 20:30 -0400, Jon Masters wrote:
>  > Yo,
>  <snip>
>  > But most randomly annoying today, an strace shows that the Rhythmbox
>  > application[0] thinks it's a good idea to do a DNS lookup *every* time
>  > one changes track...lovely. Really stupid.
>  
>  And what domain would that be? It wouldn't happen to be:
>  - Amazon.com (covers)
>  or
>  - one of the lyrics websites (lyrics plugin)
>  or
>  - audioscrobbler.com (for the last.fm functionality)
>  
>  We're working upstream on making all those disabled if NetworkManager
>  doesn't see a network connection. See:
>  http://bugzilla.gnome.org/show_bug.cgi?id=322266
>  
>  In the meanwhile, those lookups would be normal. 
Right. But even if NetworkManager detects a connection, that doesn't
mean it's actually working - moving to the track shouldn't block, the
lookup should be asynchronous ideally. It's still great software! :-)

Jon.

[Bastien Nocera]

On Sun, 2007-10-21 at 22:56 -0400, Jon Masters wrote:
>  On Mon, 2007-10-22 at 01:42 +0100, Bastien Nocera wrote:
>  > On Sun, 2007-10-21 at 20:30 -0400, Jon Masters wrote:
>  > > Yo,
>  > <snip>
>  > > But most randomly annoying today, an strace shows that the Rhythmbox
>  > > application[0] thinks it's a good idea to do a DNS lookup *every* time
>  > > one changes track...lovely. Really stupid.
>  > 
>  > And what domain would that be? It wouldn't happen to be:
>  > - Amazon.com (covers)
>  > or
>  > - one of the lyrics websites (lyrics plugin)
>  > or
>  > - audioscrobbler.com (for the last.fm functionality)
>  > 
>  > We're working upstream on making all those disabled if NetworkManager
>  > doesn't see a network connection. See:
>  > http://bugzilla.gnome.org/show_bug.cgi?id=322266
>  > 
>  > In the meanwhile, those lookups would be normal.
>  
>  Right. But even if NetworkManager detects a connection, that doesn't
>  mean it's actually working - moving to the track shouldn't block, the
>  lookup should be asynchronous ideally. It's still great software! :-) 
You didn't say it blocked, it shouldn't. File a bug with a backtrace.

[Jon Masters]

On Sun, 2007-10-21 at 20:30 -0400, Jon Masters wrote:

>  We have NSCD installed on my F8T3, why is it not running by default?
Anyone want to field an answer to this question?

I'd love to help solve some of the occasional slow bootup times by
fixing this kind of thing - I guess I'll also look at fixing vpnc so it
cleans up more gracefully on exit.

Jon.