Recursive queries fail if query source port is not fixed

[Mark Andrews]

> > -----Original Message-----
> > From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On
> > Behalf Of JINMEI Tatuya / ????
> > Sent: Thursday, August 14, 2008 3:21 PM
> > To: Hans F. Nordhaug
> > Cc: bind-users at isc.org
> > Subject: Re: Recursive queries fail if query source port is not fixed
> >
> > At Thu, 14 Aug 2008 15:20:38 +0200,
> >
> > > fctx 0xb3d04278(./NS'): destroy
> > > resquery 0xb3f02260 (fctx 0x87b7b20(images.yandex.ru/A)): response
> > > fctx 0x87b7b20(images.yandex.ru/A'): noanswer_response
> > > fctx 0x87b7b20(images.yandex.ru/A'): cache_message
> > > fctx 0x87b7b20(images.yandex.ru/A'): cancelquery
> > > fctx 0x87b7b20(images.yandex.ru/A'): cancelqueries
> > > fctx 0x87b7b20(images.yandex.ru/A'): try
> > > fctx 0x87b7b20(images.yandex.ru/A'): cancelqueries
> > > fctx 0x87b7b20(images.yandex.ru/A'): getaddresses
> > > fctx 0x87b7b20(images.yandex.ru/A'): query
> > > fctx 0x87b7b20(images.yandex.ru/A'): done
> >
> > This seems to indicate creating a query socket somehow failed.  Can
> > you build BIND by hand to see if you can reproduce the problem with
> > it?  Then we may add some ad-hock patch to provide more detailed log
> > information.
> 
> Can you run sockstat and see if there are a large number of listening UDP soc
> kets from another process or processes that maybe named is attempting to BIND
>  to as well (and failing) when sourcing the queries? I'm not sure how BIND de
> termines (if it does) if a port is free before attempting to bind to it when 
> sourcing a query. I know you can specify port ranges to not use. Maybe the is
> sue is that the port is being used by another process and eventually after a 
> retry or two, you source from a port that is not being consumed by another pr
> ocess and it works.

	The -P2's won't bind(2) to a port that is in use.
 
> -Vinny
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org