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Message-Id: <200610300854.k9U8sY05085209@www.freebsd.org>
Date: Mon, 30 Oct 2006 08:54:34 GMT
From: Christoph Mallon<christoph.mallon@gmx.de>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Unusually frequent name lookup failures
X-Send-Pr-Version: www-3.0

>Number:         104924
>Category:       misc
>Synopsis:       Unusually frequent name lookup failures
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 30 09:00:42 GMT 2006
>Closed-Date:    Mon Oct 30 09:06:39 GMT 2006
>Last-Modified:  Mon Oct 30 09:06:39 GMT 2006
>Originator:     Christoph Mallon
>Release:        RELENG_6
>Organization:
>Environment:
FreeBSD schleppi.lokal 6.1-STABLE FreeBSD 6.1-STABLE #0: Tue Aug 22 08:47:05 CEST 2006     root@schleppi:/usr/obj/usr/src/sys/KERNEL  i386

>Description:
I experience unusually frequent name lookup failures on two different machines, which also have different connections to the internet and use different DNS servers. (The machines are about 20km apart)
The other machine has a kernel and world from sources of Sep, 17th.

I typically observe this when running csup: "Name lookup failure for "cvsup.de.FreeBSD.org": Non-recoverable failure in name resolution"
It also happens sometimes when using "host" for reverse DNS lookups.
Repeating the same operation just after i got this error succeeds.

I talked to somebody with two RELENG_6_1 machines, who made similar observations. I observe this phenomen for quite some time now and therefore doubt it is something related to the DNS servers I am using. I suspect a problem in FreeBSD, but it is still too infrequent to reliably reproduce it. Maybe somebody with more experience in this matter has any pointers.
>How-To-Repeat:
Happens sometimes when doing DNS lookups. I have not discovered a particular way to trigger it.
>Fix:

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: linimon 
State-Changed-When: Mon Oct 30 09:06:06 UTC 2006 
State-Changed-Why:  
The problem has been discussed on various mailing lists and other PRs, and 
is actively being worked on.  Thanks. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=104924 
>Unformatted:
