[Samba] samba getting stuck, highwatermark replication issue?
abartlet at samba.org
Sat Oct 14 18:33:54 UTC 2017
On Sat, 2017-10-14 at 12:52 +0200, mj wrote:
> Hi Andrew,
> Thanks for chiming in!
> On 10/14/2017 12:16 PM, Andrew Bartlett via samba wrote:
> > We are carefully following the reports here, but we do expect
> > replication should be much more stable with Samba 4.7.
> OK, that's interesting, because I actually wanted to upgrade ASAP, but
> (the few) 4.7-upgrade experiences that have been posted, are mostly
> about replication issues after having upgraded:
> See https://lists.samba.org/archive/samba/2017-October/thread.html
> Have people here generally upgraded to 4.7 already? Without major
> issues? (does that explain the lack of discussion on 4.7?)
> Or are people mostly waiting until a version 4.7.1 or .2 has been released?
I remain ever thankful to those who are willing to test new Samba
versions, particularly Samba release candidates.
In regards replication issues:
- Newer Samba versions are becoming much more strict. While this may
feel like a problem, it is about failing fast and in an obvious way,
rather than allowing latent issues to remain un-detected.
- dbcheck all the things
- join a new DC rather than upgrading in-place is a safer option if
you fear replication issues
- You can test if Samba can join an existing domain by running:
samba-tool drs replicate clone-dc-database
I do realise that some of the reported issues happen after the upgrade.
This is a worry, but I think represents latent DB issues.
Finally, while taking care for user confidentiality (staff/student
names, unicodePwd and supplimentalCredential values etc) we do need to
see logs, typically less than the last 100 lines, for failures at a
higher log level (keep turning it up to until meaningful info appears).
We can't really guess very much from errors like this from another
user in another thread:
[2017/09/29 10:26:15.502219, 0]
Failed to commit objects:
Andrew Bartlett http://samba.org/~abartlet/
Authentication Developer, Samba Team http://samba.org
Samba Developer, Catalyst IT http://catalyst.net.nz/services/samba
More information about the samba