[CentOS] how to move forward/undo/revert/fix re: a failed CentOS 5.5 to SL 5.5 migration ... [SOLVED?]

On Wed, Feb 2, 2011 at 1:41 PM, Lamar Owen <lowen at pari.edu> wrote:
> On Wednesday, February 02, 2011 09:31:43 am Larry Vaden wrote:
>> "* The host/dig/nslookup utilities queried only servers from
>> resolv.conf. With this update, the utilities query the servers
>> specified on command line instead of in resolv.conf and the issue is
>> resolved. ( BZ#561299)"
>>
>> The official release notes imply that the argument on the command line
>> was ignored and the contents of /etc/resolv.conf were used instead
>> which should lead to consistent results between the two invocations.

Genau.

> I think the release notes do not reflect the actual bug, in this case.  The bug text is:
>
> "I have noticed that release 5.4 (Final) appears to ignore the server option
> when using host or nslookup if the host in question is not available.
>
> The commands should return no server available as they have in the past
> but instead decide to query the servers specified in resolv.conf and return
> results from that."
>
> As both of the servers you gave in the message provided results, the queries given do not trigger the actual bug; that is, if the server referenced is not available or does not return a result, *then* it went to the servers in resolv.conf rather than the previous behavior.
>
> Fault lies in the writer of the release note bullet point, which does not accurately describe the bug actually fixed.
>
> And that explains why  'host www.yahoo.com 208.67.220.220' and 'host www.yahoo.com 8.8.8.8' got completely different answers, as I know OpenDNS does fairly aggressive caching that semi-ignores $TTL, and google (8.8.8.8 is a google DNS server) probably does too.

I think your analysis is spot on.

kind regards/ldv