[Samba] ClassicUpgrade: ERROR(<type 'exceptions.ValueError'>): uncaught exception - zero length field name in format

[Rowland Penny]

On Sun, 16 Sep 2018 10:51:25 -0400
Bill Baird via samba <samba at lists.samba.org> wrote:

> I ran the same thing with 4.8.5 and it work without any issues:
> 
> Adding groups
> Importing groups
> Committing 'add groups' transaction to disk
> Adding users
> Importing users
> Committing 'add users' transaction to disk
> Adding users to groups
> Committing 'add users to groups' transaction to disk
> 
> 
> On Sun, Sep 16, 2018 at 10:29 AM Bill Baird <Bill.Baird at phoenixmi.com>
> wrote:
> 
> > Hi All,
> >
> > Attempting to do a classicupgrade and getting this error:
> >
> > *Adding groups*
> > *Importing groups*
> > *Committing 'add groups' transaction to disk*
> > *Adding users*
> > *Importing users*
> > *Adding users to groups*
> > *Committing 'add users to groups' transaction to disk*
> > *ERROR(<type 'exceptions.ValueError'>): uncaught exception - zero
> > length field name in format*
> > *  File
> > "/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
> > line 177, in _run*
> > *    return self.run(*args, **kwargs)*
> > *  File
> > "/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/domain.py",
> > line 1681, in run*
> > *    useeadb=eadb, dns_backend=dns_backend, use_ntvfs=use_ntvfs)*
> > *  File
> > "/usr/local/samba/lib64/python2.6/site-packages/samba/upgrade.py",
> > line 845, in upgrade_from_samba3*
> > *    result.names.domaindn, result.lp, use_ntvfs)*
> > *  File
> > "/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
> > line 1693, in setsysvolacl*
> > *    userdn = '<SID={}-{}>'.format(domainsid,
> > security.DOMAIN_RID_ADMINISTRATOR)*
> >

The answer is staring you in the face ;-)

python2.6 isn't new enough for:

'<SID={}-{}>'.format(domainsid,security.DOMAIN_RID_ADMINISTRATOR)

It would have to be:

'<SID={0}-{1}>'.format(domainsid,security.DOMAIN_RID_ADMINISTRATOR)

Or:

'<SID=%s-%s>' % (domainsid,security.DOMAIN_RID_ADMINISTRATOR)

What is your OS ?

Rowland