[Samba] Unable to successfully join Samba 4.8.0 or Windows 2008 R2 to a Samba 4.6.7 DC, unable to upgrade in-place
Andrew Bartlett
abartlet at samba.org
Sat Mar 17 19:09:26 UTC 2018
On Sat, 2018-03-17 at 07:34 +1300, Andrew Bartlett via samba-technical
wrote:
> On Thu, 2018-03-15 at 16:10 -0400, Justin Foreman wrote:
> > Okay. The master build worked on the join. Excellent. So it was 4.8.0 having a problem.
> >
> > I’ve attempted to join 2008 R2 now to 4.8.0 but it still blue screens. Should I start a new thread for clarity’s sake?
>
> So, I think this, the upgrade issues and even the old
> servicePrincipalName handling bug is all the same thing.
>
> What happened is that in the past we did not reject:
>
> servicePrincipalName: HOST/foo
> servicePrincipalName: host/foo
To further tie threads together, that would be:
https://bugzilla.samba.org/show_bug.cgi?id=8929
> Then with 4.8 the index code rejected this. With master for 4.9 we
> decided it wasn't the index code's job to do this, so fixed that (it
> helped another use case).
>
> Add to this the upgrade code for GUID indexes didn't assert that if the
> re-index failed that we must abort the transaction, so the partial
> upgrade case gets committed and it all dies on the next DB open.
>
> At least that is the theory I'll be working to prove or disprove on
> Monday.
>
> I think the core short-term fix is in:
>
> commit 5c1504b94d1417894176811f18c5d450de22cfd2
> Author: Gary Lockyer <gary at catalyst.net.nz>
> Date: Wed Feb 28 11:47:22 2018 +1300
>
> ldb_tdb: Do not fail in GUID index mode if there is a duplicate
> attribute
>
> It is not the job of the index code to enforce this, but do give a
> a warning given it has been detected.
>
> However, now that we do allow it, we must never return the same
> object twice to the caller, so filter for it in
> ltdb_index_filter().
>
> The GUID list is sorted, which makes this cheap to handle,
> thankfully.
>
> Signed-off-by: Gary Lockyer <gary at catalyst.net.nz>
> Reviewed-by: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
> Reviewed-by: Andrew Bartlett <abartlet at samba.org>
>
>
> The replication to windows may be failing because of the duplicate
> value, eventually we will need to write a dbcheck rule to fix that.
>
> Thanks all for your patience!
>
> Andrew Bartlett
--
Andrew Bartlett http://samba.org/~abartlet/
Authentication Developer, Samba Team http://samba.org
Samba Developer, Catalyst IT http://catalyst.net.nz/services/samba
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