Re: regresssion script hole

From: Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>
To: Martijn van Oosterhout <kleptog(at)svana(dot)org>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: regresssion script hole
Date: 2006-06-19 13:39:58
Message-ID: 4496A92E.6090901@kaltenbrunner.cc
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Martijn van Oosterhout wrote:
> On Mon, Jun 19, 2006 at 09:21:21AM -0400, Tom Lane wrote:
>> Of course the $64 question is *why* is 8.0 trying to resolve that name,
>> particularly seeing that the later branches apparently aren't.
>
> The formatting of the message suggests it is a gethostbyname("''")
> doing it. Did any quoting rules change between 8.0 and 8.1 w.r.t. the
> configuration files?

I tcpdump'd the dns-traffic on that box during a postmaster startup and
it's definitly trying to look up ''.kaltenbrunner.cc a lot of times.
And from what it looks like it might be getting somehow rate limited by
my ISPs recursive resolvers after doing the same query a dozens of times
and getting a "servfail" every time.
At least the timestamps seem to indicate that the responses are getting
delayed up to 10 seconds after a number of queries ...
It might be a complete shot in the dark but spoonbill worked fine on
REL_8_0_STABLE until i disabled reporting 3 month ago.
During this time the large escaping security fix/standard_strings patch
went in - could this be related in any way ?

Stefan

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