[Samba] Online Backup Fails - list index out of range

Roy Eastwood spindles7 at gmail.com
Fri Aug 30 07:53:26 UTC 2019


> -----Original Message-----
> From: Andrew Bartlett [mailto:abartlet at samba.org]
> Sent: 30 August 2019 01:30
> To: Roy Eastwood; 'Tim Beale'; samba at lists.samba.org
> Subject: Re: [Samba] Online Backup Fails - list index out of range
> 
> On Thu, 2019-08-29 at 22:59 +0100, Roy Eastwood via samba wrote:
> > > -----Original Message-----
> > > From: Tim Beale [mailto:timbeale at catalyst.net.nz]
> > > Sent: 29 August 2019 22:08
> > > To: Roy Eastwood; samba at lists.samba.org
> > > Subject: Re: [Samba] Online Backup Fails - list index out of range
> > >
> > >
> > > > Is this another bug?
> > >
> > > It's not really a bug. The backup process needs to allocate a new RID
> > > and the DC you're running the backup against doesn't have a RID pool
> > > allocated. E.g. see:
> > >
> > > https://lists.samba.org/archive/samba/2019-February/221619.html
> > >
> > > I have improved the error message you get in this case on master, but I
> > > haven't backported this yet.
> >
> > Thanks for that.   I still don't understand though as the DC on which I am doing the backup is the RIDAllocationMasterRole owner
> (actually it owns all the FSMO roles), so shouldn't it be able to provide a new RID?      Or am I missing something?
> 
> It will do that when you create a user on that domain.  We don't modify
> the domain we are backing up so we can't do this properly, instead we
> emulate the algorithm locally.
> 
> The typical case is a backup of a DC that has just joined the domain,
> but recent Samba versions explicitly get a RID pool on join for
> reliability, so that shouldn't happen any more.
> 
> Andrew Bartlett

Thanks for the clarification.   I added a new user to the domain, and repeated the backup and it completed successfully.
Many thanks.
Roy




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