Re: DNS caching(?) page-hangup issues and Opera 10.X

Kenneth Crudup <[email protected]> writes:

> On Mon, 5 Jul 2010, Eirik Byrkjeflot Anonsen wrote:
>
>> Here's a test program, which looks up each name in turn.  Run it (on a
>> set of names which are not cached on your system...), wait for the first
>> lookup to be done (to be sure the C library has properly initialized the
>> DNS subsystem) and then switch network and see if the same problem
>> occurs.
>
> The test program works perfectly. Opera, on the other hand, hangs up trying
> to resolve the very same hostnames I just looked up via the test program.

So there is something more to it than that.  Unfortunately, I can't
imagine how this can happen.

Maybe an ltrace or an strace could give some information.  Did you try
'-debugdns', by the way?

> Not only that, it's really forgetful- the hostname it's trying to resolve
> is one it just loaded not 5 mins ago.
>
> 	-Kenny

It is possible that we are using very short cache timeouts, I guess.  Or
even that we don't cache DNS lookups at all any more, but I would expect
that to be a significant performance issue.

eirik
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