From: erik quanstrom <quanstro@coraid.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] lsub.org
Date: Mon, 13 Aug 2007 15:11:56 -0400 [thread overview]
Message-ID: <4422fa2a6c7cb5c6f644037951a9ffaf@coraid.com> (raw)
In-Reply-To: <5c82b3e7ca28d1d2fb8ddd70d81fd148@plan9.bell-labs.com>
> We've been having good luck with the dns currently on sources. I
> don't think I have seen the srvfail problem. The query waits on
> reverse lookups seem to have been a symptom of local ndb
> misconfiguration, though it would be better if dns coped more sensibly
> with that. As I recall, the nameserver(s) for the reverse domain need
> to have the relevant ptr records; pointing the reverse domain at the
> wrong nameservers (implicitly or explicitly) seems to cause confusion.
could you explain this senerio more?
when i see queries hanging, it's almost always on recursive reverse lookups
for email validataion. some external server will return srvfail but the query
will be restarted from the dns root ad inf. this results on other queries to the
same zone to wait for the query lock forever. since spam often comes in
bunches from the same domains, this often uses up all the available responding
threads.
what could be wrong in the local ndb file for this to be happening?
- erik
next prev parent reply other threads:[~2007-08-13 19:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-13 3:25 ron minnich
2007-08-13 3:47 ` Gorka Guardiola
2007-08-13 11:56 ` erik quanstrom
2007-08-13 12:03 ` erik quanstrom
2007-08-13 13:39 ` Francisco J Ballesteros
2007-08-13 14:34 ` Francisco J Ballesteros
2007-08-13 18:29 ` geoff
2007-08-13 18:44 ` erik quanstrom
2007-08-13 19:11 ` erik quanstrom [this message]
2007-08-13 22:12 ` geoff
2007-08-14 16:55 ` erik quanstrom
2007-08-14 21:28 ` Artem Letko
2007-08-14 21:52 ` erik quanstrom
2007-08-14 22:07 ` Artem Letko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4422fa2a6c7cb5c6f644037951a9ffaf@coraid.com \
--to=quanstro@coraid.com \
--cc=9fans@cse.psu.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).