update with no effect

[Kevin Darcy]

Lars Hecking wrote:
>  I have started seeing these entries in named.log:
>
> 29-Mar-2009 05:02:35.467 general: warning: update with no effect
> 29-Mar-2009 05:02:35.468 general: warning: update with no effect
> 29-Mar-2009 05:02:35.469 general: warning: update with no effect
> 29-Mar-2009 05:02:35.470 general: warning: update with no effect
> 29-Mar-2009 05:02:35.471 general: warning: update with no effect
> 29-Mar-2009 05:02:35.472 general: warning: update with no effect
> 29-Mar-2009 05:02:35.478 general: warning: update with no effect
> 29-Mar-2009 05:02:35.479 general: warning: update with no effect
> 29-Mar-2009 05:02:35.480 general: warning: update with no effect
> 29-Mar-2009 05:02:35.481 general: warning: update with no effect
> 29-Mar-2009 05:02:35.482 general: warning: update with no effect
> 29-Mar-2009 05:02:35.483 general: warning: update with no effect
> 29-Mar-2009 05:02:35.484 general: warning: update with no effect
>
>  What is that about? This is bind 9.4.2-P2 on Solaris 8.
>   
If I had to guess, I'd say it's probably a broken IXFR implementation on 
the other end:

if (result == DNS_R_UNCHANGED) {
/*
* This will not happen when executing a
* dynamic update, because that code will
* generate strictly minimal diffs.
* It may happen when receiving an IXFR
* from a server that is not as careful.
* Issue a warning and continue.
*/
if (warn)
isc_log_write(DIFF_COMMON_LOGARGS,
ISC_LOG_WARNING,
"update with no effect");

It would be nice to have the zone name and/or master server name in the 
error message. Maybe that was added in a later version (too lazy to 
check right now :-)

- Kevin