Strange nsupdate results.

[Mark_Andrews at isc.org]

> Steven Job wrote:
> 
> > Just wondering if anyone else is having the same problem.
> > I am running bind-9.2.2.
> >
> > I have a script that changes the IP by sending an nsupdates (two lines, one
>  to remove the old ip and one to add it back with the new IP).
> >
> > For some reason (once in a blue moon it looks like) the first IP never is r
> emoved and it just ends up created multiple A records.  Which is obviously wr
> ong.
> >
> > I did not have this problem at bind-9.2.1.  But the strange thing is that I
>  can not duplicate it when I want. I sent over 100,000 updates and it worked 
> fine.  But after a day or so I will see it pop up again.
> >
> > Is this something that is known or is something wrong on my end.  Is there 
> some extra verbosity I can set (other than rndc querylog) for nsupdate?
> 
> Are you using the "-d" option to nsupdate? Save off the nsupdate "-d" output 
> and that should help you narrow down the problem.
> 
> Also, in the interim and depending on your requirements, you may want to cons
> ider setting a prerequisite on the "add" part of the transaction. (Depends on
>  whether it's worse to have multiple A records or no A
> records at all for a given name).

	Or you can delete ALL the A records rather than a specific A record.
	Just remember to add after rather than before as the update is
	processed sequentially.

>       - Kevin
> 
> 
> 
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org