Massively excessive DNS lookups in ads_XXXX code.

[Andreas Schneider]

On Thursday, 23 July 2020 00:29:45 CEST Jeremy Allison via samba-technical 
wrote:
> Hi all,

Hi Jeremy,

> Do you concur ?

Yep :-)

Have you ever called 'net ads join' in a big network with 200 DCs? Once we get 
the list with DCs we will resolve *every* name we got to an IP address. Yes, 
one would be enough. If we run into timeouts (30sec) a 'net ads join' takes 
about 5-10 minutes to succeed.

Take a look at the while loop in discover_dc_dns() :-)


Thanks for looking into this! ;-)


	Andreas

-- 
Andreas Schneider                      asn at samba.org
Samba Team                             www.samba.org
GPG-ID:     8DFF53E18F2ABC8D8F3C92237EE0FC4DCC014E3D