FW: Sporadic permission denied error in Samba 4.3 and 4.4, 4.2 OK

[Youzhong Yang]

Thanks Volker. How easy is it to switch back to tdb-based messaging? I can try it here. Also is it possible to debug datagram messaging to find out why it is not working?

-----Original Message-----
From: vlendec at samba.org [mailto:vlendec at samba.org] On Behalf Of Volker Lendecke
Sent: Monday, November 14, 2016 3:41 PM
To: Youzhong Yang <Youzhong.Yang at mathworks.com>
Cc: Jeremy Allison <jra at samba.org>; samba-technical at lists.samba.org
Subject: Re: FW: Sporadic permission denied error in Samba 4.3 and 4.4, 4.2 OK

On Mon, Nov 14, 2016 at 08:34:02PM +0000, Youzhong Yang wrote:
> >What message is being lost ? There are 4 messages:
> >
> >1) smbd -> smbd (request lease break - inter process messaging) 2). 
> >smbd -> client (request lease break - on the wire) 3). client -> smbd 
> >(lease break ack - on the wire).
> >4). smbd -> smbd (broke lease - retry open - inter process messaging).
> 
> The first one.
> 
> >Under what circumstances does this occur ?
> 
> I don't know. I still don't have luck in reproducing the issue outside 
> of our environment. It happens sporadically, but never in 4.2.x, no 
> matter how many times I tried.

Ok, possibly we have to go back to tdb-based messaging. Sad, but if datagram messaging just does not cut it, we can't use it.

Volker