too many timeouts - disabling EDNS

[Mark Andrews]

The log should get less noisy in the next release.

2409.   [bug]           Only log that we disabled EDNS processing if we were
                        subsequently successful.  [RT #18029]

Currently the log indicated when we have disabled EDNS processing
due to timeouts.  Mis-handling of EDNS queries or the responses are
not the only cause of timeouts.

Note just about all versions of named disable EDNS processing on
timeout.  This however impacts on DNSSEC processing as DNSSEC
requires EDNS.

The log message is there to highlight potential problems.

Mark

> After upgrading to bind-9.5.0-P2, I get many of the following message in
> the log. Is this something I need to worry about or can I just suppress
> it?
>  
> I don't' get a response from the command line for the domains associated
> with the error and I don't seem get anything about most of them from
> using dnsstuff.com free tools either?
> So I'm just curious what are those domains? Is it safe to suppress the
> EDNS messages. I didn't see that before the upgrade, I was running
> bind-9.3.2.
>  
> Aug 15 15:45:23  named[10612]: too many timeouts resolving
> 'ns1.e-fastcash.com/AAAA' (in 'e-fastcash.com'?): disabling EDNS
> Aug 15 15:45:27   named[10612]: too many timeouts resolving
> 'ns.e-fastcash.com/AAAA' (in 'e-fastcash.com'?): disabling EDNS
> Aug 15 15:45:27   named[10612]: too many timeouts resolving
> 'ns1.e-fastcash.com/AAAA' (in 'e-fastcash.com'?): disabling EDNS
> Aug 15 15:45:43   named[10612]: too many timeouts resolving
> '_kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.DAL.ORG/SRV'
> (in 'dal.org'?): disabling EDNS
> Aug 15 15:45:43   named[10612]: too many timeouts resolving
> '_kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.DAL.ORG/SRV'
> (in 'dal.org'?): disabling EDNS
> Aug 15 15:45:44   named[10612]: too many timeouts resolving
> '_kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.DAL.ORG/SRV'
> (in 'dal.org'?): disabling EDNS
> Aug 15 15:45:53   named[10612]: too many timeouts resolving
> 'pharma011.dal.org/A' (in 'dal.org'?): disabling EDNS
> Aug 15 15:45:55   named[10612]: too many timeouts resolving
> 'pharma011.dal.org/A' (in 'dal.org'?): disabling EDNS
>  
>  
> Thanks
> 
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org