Maintained by: NLnet Labs

[Unbound-users] Old entries in the requestlist

W.C.A. Wijngaards
Wed Jun 30 18:53:02 CEST 2010


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Hi Brian,

It is timing out.  Are the incoming server replies blocked by your
firewall (since these are different boxes?)?

The (empty list) text is a display bug in unbound-control and is fixed
in 1.4.5.

In the development svn trunk version I fixed a couple bugs recently that
should keep operation (as well as possible) going smoothly under those
conditions - with old entries jostled out instead of dropped queries.

However that would not fix the underlying problem, that UDP connections
to the internet do not work or large packet drops, from these servers
towards the internet.  Or I suspect something like that.

Best regards,
   Wouter

On 06/30/2010 06:21 PM, Brian Widdas wrote:
> Hi,
> 
> I'm running unbound-1.4.3 on a pair of busy Linux caches. It has been
> compiled with libevent.
> 
> The request list is slowly filling up. I've tried various sizes (it's
> currently 4 threads with 4096 requests/thread, so 16384 in total), and
> the request list always fills up (and starts discarding incoming
> queries). unbound-control dump_requestlist shows entries that are
> hours old, eg
> 
> 175    A IN 1.10076.0.0.276.0.47.b.radar.cedexis.net. 2047.857478
> iterator wants AAAA IN flip1.cedexis.net. AAAA IN flip2.cedexis.net.
>  311    A IN medias.lemonde.fr. 2104.565184 iterator wants AAAA IN
> flip1.cedexis.net. AAAA IN flip2.cedexis.net.
> 
> 294    A IN intra05.griffin-net.com. 12574.009854 iterator wait for (empty_list)
> 316    A IN L221SR07.griffin-net.com. 12811.485119 iterator wait for
> (empty_list)
> 
> 
> Has anyone else seen this? Why aren't they being discarded when they
> reach a certain age?
> 
> I've not tried a more recent version of Unbound, but I didn't see
> anything in the release notes to suggest this issue is fixed. I was
> running 1.4.3 on Solaris 10 before without noting this problem.
> 
> 
> Thanks,
> 
> Brian

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