mkdir-dup test flapping

[Andrew Bartlett]

On Mon, 2016-02-29 at 20:16 -0800, Jeremy Allison wrote:
> On Tue, Mar 01, 2016 at 04:17:12PM +1300, Andrew Bartlett wrote:
> > 
> > G'Day Jeremy,
> > 
> > In testing Samba on the Catalyst Cloud, we more often than not get
> > a
> > flapping test failure, rather than our real issues.  One that has
> > come
> > particularly to my attention is
> > 
> > [438(1936)/1885 at 1h5m1s] samba3.smb2.create(ad_dc)
> > Testing SMB2 Create Directory with multiple connections
> > waiting for replies
> > UNEXPECTED(failure): samba3.smb2.create.mkdir-dup(ad_dc)
> > REASON: Exception: Exception:
> > ../source4/torture/smb2/create.c:1628:
> > File 1 returned status NT_STATUS_ACCESS_DENIED
> > 
> > FAILED (1 failures, 0 errors and 0 unexpected successes in 0
> > testsuites)
> > 
> > This is your code in 969d043596c0a382325d54d16dbd5e049f884fa9
> > testing  
> > https://bugzilla.samba.org/show_bug.cgi?id=11486
> > 
> > ad_dc here uses the smbd file server (no, this isn't NTVFS :-)
> > 
> > Can you look into this for us, and perhaps see if the code could be
> > made more robust during the loop?  I'm very happy to get you access
> > to
> > a suitable machine to show the issue, but sadly it only seems to
> > reproduce easily in a full autobuild (along with all the other
> > flapping
> > tests).
> Can you get a debug level 10 log from the server showing
> the problem ? That's probably the easiest way to track
> this down. As I said, the client test code is really
> simple here..

I'll see what I can do.  We are also working to get mozilla RR working
on Samba, and that will be really, really helpful for this kind of
thing.

Andrew Bartlett

-- 
Andrew Bartlett
https://samba.org/~abartlet/
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   
https://catalyst.net.nz/services/samba