[Samba] Replication Error Between Differing Samba Versions During Upgrade

[Achim Gottinger]

Am 04.10.2017 um 00:31 schrieb Mike Ray via samba:
> Hello all-
>
> At the recommendation of the Catalyst team, instead of trying to get 4.0.6
> replicating with 4.0.7, they suggested we try a later version (>=4.5) as those
> versions are much more recent and may have handled issues older versions just
> could not. Unfortunately that too did not work. They then suggested that an
> in-place upgrade, as if there was a bug in our 4.0.6 code that was causing
> problems, there was not much else that could be done. The server survived an
> upgrade from Ubuntu 12.04 (Samba 4.0.6) to Ubuntu 14.04 (Samba 4.3.11) with
> minimal work afterwards (samba-dsdb-modules and samba-vfs-modules packages were
> missing) and seemingly no loss of data.
>
> We still plan on going up to 4.7 via SerNet packages or similar, but at
> this point it seems we are out of the woods.
>
> TL;DR - we fixed a replication issue that was blocking an upgrade by first
> upgrading our existing hosts.
>
> ----- On Oct 2, 2017, at 5:32 PM, Mike Ray mray at xes-inc.com wrote:
>
>> Spent more time on this today and found the
> following:
>
Have you tried to update only your fsmo master to an recent version, say 
4.6.8. Denote the other servers on the fsmo master using the 
--remove-other-dead-server option and rejoin the other servers after 
updating samba to 4.6.8 on each server?
I'd try that only if the missing attributes you found using ldapcmp are 
not located on the fsmo master.