[Samba] CTDB and locking issues in 4.4.6 (Classic domain)

[Amitay Isaacs]

On Thu, Oct 20, 2016 at 8:09 PM, Alex Crow via samba <samba at lists.samba.org>
wrote:

> Hi list
>
> We recently upgraded our fileservers from Centos supplied 4.2.10 to Sernet
> 4.4.6, and then our DCs from 3.6.x to 4.4.6.
>
> It seems that since then we've had problems with locks not being obeyed on
> all nodes - they only seem to work when a second client opens a file on the
> same node as the first client.
>
> For example, when a user opens an Excel file I will see something like
> this with smbstatus -L:
>
> 1:30578      1608       DENY_WRITE 0x2019f     RDWR       NONE /sharename
> path/foo.xls
>
> This output is identical on all nodes, so smbstatus at least can see the
> locks.
>
> However if another client opens the same XLS file, they only get the "This
> file is in use by <username>" if they happen to hit the same server as the
> first user. If they happen to land on another server they don't get this
> prompt, and if the original user modifies the file, when they try to save
> their changes they get prompted whether they want to overwrite. I'm sure we
> didn't have this issue before the upgrade.
>
> CTDB status reports as OK on all nodes.
>
> Our filesystem passes ping_pong in both read and read/write, data
> increment behaving as expected.
>
> We have a lot of users trying to edit Excel and Word docs (Office 2010) so
> this is happening quite often.
>
> Best regards,
>
> Alex
>
>
It appears that samba is still using local databases and not clustered
databases.

What does "ctdb getdbmap" list?  Is locking.tdb a clustered database?  Do
you have "clustering = yes" in smb.conf on all the nodes?

Amitay.