Domain join failing in an RODC site.

[HEMANTH THUMMALA]

Hi All,

When we are trying to join the domain from a site in which only available
DC is Read Only DC, Samba server is always contacting the site local RODC
and failing with status not supported error.

Whereas other windows clients in the same site are able to contact the
writable DCs outside of the site and domain join is succeeding.

Looks like we are always querying the site local DC information .. Here is
the snippet from net ads join -d10 :

dsgetdcname: domain_name: FUNC, domain_guid: (null), site_name: (null),
flags: 0x40001011
debug_dsdcinfo_flags: 0x40001011
        DS_FORCE_REDISCOVERY DS_DIRECTORY_SERVICE_REQUIRED
DS_WRITABLE_REQUIRED DS_RETURN_DNS_NAME
sitename_fetch: Returning sitename for FUNC: "FUNC-SITE3"
dsgetdcname_rediscover
ads_dns_lookup_srv: Failed to resolve
_ldap._tcp.FUNC-SITE3._sites.dc._msdcs.FUNC (Unknown error: 0)

I also witnessed that in dsgetdcname() there is no separate query sent when
we have flag DS_WRITABLE_REQUIRED for domain join.

Bug 5917 already raised for the same. Just want to know whether this has
been addressed in latest releases including samba4.

Thanks,
Hemanth.