samba - Mar 2013 - Samba 4 classicupgrade: Error converting string to value for line:"CurrentVersion"

Hello,

I've seen this upgrade error posted before:

https://lists.samba.org/archive/samba/2013-January/171022.html

but either there is a different issue or I'm misreading the post.

Basically when I run the classicupgrade (samba3 to 4) on a test machine, 
I get the following (the full debug output will be at the end of my post):
.......
key added: key=CurrentVersion,key=Windows 
NT,key=Microsoft,key=SOFTWARE,hive=NONE
About to write CurrentVersion with type (null), length 3: 6.1
convert_string_talloc: Conversion not supported.
Error converting string to value for line:
"CurrentVersion"
ERROR(runtime): uncaught exception - (31, 'WERR_GENERAL_FAILURE')
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
line 175, in _run
     return self.run(*args, **kwargs)
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/domain.py",
line 1318, 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
841, in upgrade_from_samba3
     use_ntvfs=use_ntvfs, skip_sysvolacl=True)
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
line 2100, in provision
     setup_registry(paths.hklm, session_info, lp=lp)
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
line 1002, in setup_registry
     reg.diff_apply(provision_reg)
The connection to the LDAP server was closed

As suggested by the post referred to above, I've moved my registry.tdb 
away, but without any effect. I've traced the upgrade and it seems it 
doesn't look for registry.tdb (or at least I cannot find any attempt to 
open it).

I would be grateful for any hints!

Thanks!

Best regards,
Andrei


Full debug follows:

# /usr/local/samba/bin/samba-tool domain classicupgrade -d 200 
--dbdir=/root/work/samba/ --use-xattrs=yes --realm=windom.gbif.org 
/root/work/smb.conf
INFO: Current debug levels:
   all: 200
   tdb: 200
   printdrivers: 200
   lanman: 200
   smb: 200
   rpc_parse: 200
   rpc_srv: 200
   rpc_cli: 200
   passdb: 200
   sam: 200
   auth: 200
   winbind: 200
   vfs: 200
   idmap: 200
   quota: 200
   acls: 200
   locking: 200
   msdfs: 200
   dmapi: 200
   registry: 200
Reading smb.conf
lp_load_ex: refreshing parameters
Initialising global parameters
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
params.c:pm_process() - Processing configuration file
"/root/work/smb.conf"
Processing section "[global]"
doing parameter unix charset = LOCALE
doing parameter unix extensions = off
doing parameter workgroup = GBIF
doing parameter netbios name = newaino
doing parameter server string = GBIF mail and file server
doing parameter hide dot files = yes
doing parameter hide unreadable = yes
doing parameter veto files = /*netlogon*/Maildir/
doing parameter interfaces = em1 , lo
doing parameter bind interfaces only = Yes
doing parameter passdb backend = ldapsam:"ldap://localhost"
doing parameter username map = /etc/samba/smbusers
doing parameter log level = 1
WARNING: The "idmap backend" option is deprecated
WARNING: The "idmap uid" option is deprecated
WARNING: The "idmap gid" option is deprecated
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Unknown parameter encountered: "share modes"
Ignoring unknown parameter "share modes"
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Unknown parameter encountered: "printer admin"
Ignoring unknown parameter "printer admin"
Provisioning
Exporting account policy
Exporting groups
Exporting users
Ignoring group memberships of 'root' 
S-1-5-21-1963682937-3502233201-1541774305-1000: Unable to enumerate 
group memberships, (-1073741596,NT_STATUS_INTERNAL_DB_CORRUPTION)
Next rid = 41026
Exporting posix attributes
Reading WINS database
Looking up IPv4 addresses
Looking up IPv6 addresses
No IPv6 address will be assigned
INFO: Current debug levels:
   all: 200
   tdb: 200
   printdrivers: 200
   lanman: 200
   smb: 200
   rpc_parse: 200
   rpc_srv: 200
   rpc_cli: 200
   passdb: 200
   sam: 200
   auth: 200
   winbind: 200
   vfs: 200
   idmap: 200
   quota: 200
   acls: 200
   locking: 200
   msdfs: 200
   dmapi: 200
   registry: 200
doing parameter idmap_ldb:use rfc2307 = yes
Processing section "[netlogon]"
doing parameter path = 
/usr/local/samba/var/locks/sysvol/windom.gbif.org/scripts
doing parameter read only = No
Processing section "[sysvol]"
add_a_service: Creating snum = 16 for sysvol
hash_a_service: hashing index 16 for service name sysvol
doing parameter path = /usr/local/samba/var/locks/sysvol
doing parameter read only = No
pm_process() returned Yes
set_conn_connectpath: service (null), connectpath = /
Initialising default vfs hooks
vfs_find_backend_entry called for posixacl
Successfully added vfs backend 'posixacl'
vfs_find_backend_entry called for /[Default VFS]/
Successfully added vfs backend '/[Default VFS]/'
vfs_find_backend_entry called for dfs_samba4
Successfully added vfs backend 'dfs_samba4'
vfs_dfs_samba4: Debug class number of 'fileid': 20
Initialising custom vfs hooks from [/[Default VFS]/]
vfs_find_backend_entry called for /[Default VFS]/
Successfully loaded vfs module [/[Default VFS]/] with the new modules system
Initialising custom vfs hooks from [acl_xattr]
vfs_find_backend_entry called for acl_xattr
vfs module [acl_xattr] not loaded - trying to load...
Loading module 'acl_xattr'
Loading module 'acl_xattr': Trying to load from 
/usr/local/samba/lib/vfs/acl_xattr.so
Module 'acl_xattr' loaded
vfs_find_backend_entry called for acl_xattr
Successfully added vfs backend 'acl_xattr'
vfs_find_backend_entry called for acl_xattr
Successfully loaded vfs module [acl_xattr] with the new modules system
Initialising custom vfs hooks from [dfs_samba4]
vfs_find_backend_entry called for dfs_samba4
Successfully loaded vfs module [dfs_samba4] with the new modules system
Calling acl_set_file: /usr/local/samba/var/locks/sysvol/tmpoEPBWP, 0
set_conn_connectpath: service (null), connectpath = /
Initialising default vfs hooks
Initialising custom vfs hooks from [/[Default VFS]/]
vfs_find_backend_entry called for /[Default VFS]/
Successfully loaded vfs module [/[Default VFS]/] with the new modules system
Initialising custom vfs hooks from [acl_xattr]
vfs_find_backend_entry called for acl_xattr
Successfully loaded vfs module [acl_xattr] with the new modules system
Initialising custom vfs hooks from [dfs_samba4]
vfs_find_backend_entry called for dfs_samba4
Successfully loaded vfs module [dfs_samba4] with the new modules system
Setting up share.ldb
lpcfg_servicenumber: couldn't find ldb
Setting up secrets.ldb
lpcfg_servicenumber: couldn't find ldb
lpcfg_servicenumber: couldn't find ldb
Setting up the registry
ldb: ldb_trace_request: SEARCH
  dn: @MODULES
  scope: base
  expr: (@LIST=*)
  attr: @LIST
  control: <NONE>

ldb: ldb_trace_request: (tdb)->search
tevent: Added timed event "ltdb_callback": 0x1d0ccb0
tevent: Added timed event "ltdb_timeout": 0x1d0cd60
tevent: Destroying timer event 0x1d0cd60 "ltdb_timeout"
tevent: Ending timer event 0x1d0ccb0 "ltdb_callback"
ldb: no modules required by the db
ldb: No modules specified for this database
ldb: ldb_trace_request: REGISTER_CONTROL
1.2.840.113556.1.4.1413
  control: <NONE>

ldb: ldb_asprintf/set_errstring: unable to find module or backend to 
handle operation: request
ldb: ldb_trace_request: SEARCH
  dn: <rootDSE>
  scope: base
  expr: (objectClass=*)
  attr: rootDomainNamingContext
  attr: configurationNamingContext
  attr: schemaNamingContext
  attr: defaultNamingContext
  control: <NONE>

ldb: ldb_trace_request: (tdb)->search
tevent: Added timed event "ltdb_callback": 0x1cf2300
tevent: Added timed event "ltdb_timeout": 0x1cf2440
ldb: ldb_asprintf/set_errstring: NULL Base DN invalid for a base search
tevent: Destroying timer event 0x1cf2440 "ltdb_timeout"
tevent: Ending timer event 0x1cf2300 "ltdb_callback"
ldb_wrap open of hklm.ldb
ldb: start ldb transaction (nesting: 0)
ldb: ldb_trace_request: (tdb)->start_transaction
ldb: start ldb transaction error: (null)
ldb: ldb_trace_request: ADD
dn: @ATTRIBUTES
changetype: add
key: CASE_INSENSITIVE
value: CASE_INSENSITIVE


  control: <NONE>

ldb: ldb_trace_request: (tdb)->add
tevent: Added timed event "ltdb_callback": 0x1cf2500
tevent: Added timed event "ltdb_timeout": 0x1cf25b0
tevent: Destroying timer event 0x1cf25b0 "ltdb_timeout"
tevent: Ending timer event 0x1cf2500 "ltdb_callback"
ldb: ldb_trace_request: (tdb)->prepare_commit
ldb: commit ldb transaction (nesting: 0)
ldb: ldb_trace_request: (tdb)->end_transaction
tevent: Added timed event "ltdb_callback": 0x1d0ca70
tevent: Added timed event "ltdb_timeout": 0x1d0cb20
tevent: Destroying timer event 0x1d0cb20 "ltdb_timeout"
tevent: Ending timer event 0x1d0ca70 "ltdb_callback"
Key 'key=SOFTWARE,hive=NONE' not found
tevent: Added timed event "ltdb_callback": 0x1d14c20
tevent: Added timed event "ltdb_timeout": 0x1d14d40
tevent: Destroying timer event 0x1d14d40 "ltdb_timeout"
tevent: Ending timer event 0x1d14c20 "ltdb_callback"
key added: key=SOFTWARE,hive=NONE
tevent: Added timed event "ltdb_callback": 0x1d1ff70
tevent: Added timed event "ltdb_timeout": 0x1d20020
tevent: Destroying timer event 0x1d20020 "ltdb_timeout"
tevent: Ending timer event 0x1d1ff70 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d20b80
tevent: Added timed event "ltdb_timeout": 0x1d20c30
tevent: Destroying timer event 0x1d20c30 "ltdb_timeout"
tevent: Ending timer event 0x1d20b80 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d21740
tevent: Added timed event "ltdb_timeout": 0x1d217f0
tevent: Destroying timer event 0x1d217f0 "ltdb_timeout"
tevent: Ending timer event 0x1d21740 "ltdb_callback"
Key 'key=Microsoft,key=SOFTWARE,hive=NONE' not found
tevent: Added timed event "ltdb_callback": 0x1d1fc20
tevent: Added timed event "ltdb_timeout": 0x1d1fd40
tevent: Destroying timer event 0x1d1fd40 "ltdb_timeout"
tevent: Ending timer event 0x1d1fc20 "ltdb_callback"
key added: key=Microsoft,key=SOFTWARE,hive=NONE
tevent: Added timed event "ltdb_callback": 0x1d22520
tevent: Added timed event "ltdb_timeout": 0x1d225d0
tevent: Destroying timer event 0x1d225d0 "ltdb_timeout"
tevent: Ending timer event 0x1d22520 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d23030
tevent: Added timed event "ltdb_timeout": 0x1d230e0
tevent: Destroying timer event 0x1d230e0 "ltdb_timeout"
tevent: Ending timer event 0x1d23030 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d16380
tevent: Added timed event "ltdb_timeout": 0x1d16640
tevent: Destroying timer event 0x1d16640 "ltdb_timeout"
tevent: Ending timer event 0x1d16380 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d17210
tevent: Added timed event "ltdb_timeout": 0x1d172c0
tevent: Destroying timer event 0x1d172c0 "ltdb_timeout"
tevent: Ending timer event 0x1d17210 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d17210
tevent: Added timed event "ltdb_timeout": 0x1d17bf0
tevent: Destroying timer event 0x1d17bf0 "ltdb_timeout"
tevent: Ending timer event 0x1d17210 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d18790
tevent: Added timed event "ltdb_timeout": 0x1d18840
tevent: Destroying timer event 0x1d18840 "ltdb_timeout"
tevent: Ending timer event 0x1d18790 "ltdb_callback"
Key 'key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE' not found
tevent: Added timed event "ltdb_callback": 0x1d181d0
tevent: Added timed event "ltdb_timeout": 0x1d16610
tevent: Destroying timer event 0x1d16610 "ltdb_timeout"
tevent: Ending timer event 0x1d181d0 "ltdb_callback"
key added: key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE
tevent: Added timed event "ltdb_callback": 0x1d19360
tevent: Added timed event "ltdb_timeout": 0x1d19410
tevent: Destroying timer event 0x1d19410 "ltdb_timeout"
tevent: Ending timer event 0x1d19360 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d19e10
tevent: Added timed event "ltdb_timeout": 0x1d19ec0
tevent: Destroying timer event 0x1d19ec0 "ltdb_timeout"
tevent: Ending timer event 0x1d19e10 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1a7e0
tevent: Added timed event "ltdb_timeout": 0x1d1aaa0
tevent: Destroying timer event 0x1d1aaa0 "ltdb_timeout"
tevent: Ending timer event 0x1d1a7e0 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1b6d0
tevent: Added timed event "ltdb_timeout": 0x1d1b780
tevent: Destroying timer event 0x1d1b780 "ltdb_timeout"
tevent: Ending timer event 0x1d1b6d0 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1b6d0
tevent: Added timed event "ltdb_timeout": 0x1d1c110
tevent: Destroying timer event 0x1d1c110 "ltdb_timeout"
tevent: Ending timer event 0x1d1b6d0 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1ccb0
tevent: Added timed event "ltdb_timeout": 0x1d1cd60
tevent: Destroying timer event 0x1d1cd60 "ltdb_timeout"
tevent: Ending timer event 0x1d1ccb0 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1dcf0
tevent: Added timed event "ltdb_timeout": 0x1d1dda0
tevent: Destroying timer event 0x1d1dda0 "ltdb_timeout"
tevent: Ending timer event 0x1d1dcf0 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1dd80
tevent: Added timed event "ltdb_timeout": 0x1d1e5c0
tevent: Destroying timer event 0x1d1e5c0 "ltdb_timeout"
tevent: Ending timer event 0x1d1dd80 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1ccb0
tevent: Added timed event "ltdb_timeout": 0x1d1f0e0
tevent: Destroying timer event 0x1d1f0e0 "ltdb_timeout"
tevent: Ending timer event 0x1d1ccb0 "ltdb_callback"
tevent: Added timed event "ltdb_callback": 0x1d1e520
tevent: Added timed event "ltdb_timeout": 0x1d1ccb0
tevent: Destroying timer event 0x1d1ccb0 "ltdb_timeout"
tevent: Ending timer event 0x1d1e520 "ltdb_callback"
Key 'key=CurrentVersion,key=Windows 
NT,key=Microsoft,key=SOFTWARE,hive=NONE' not found
tevent: Added timed event "ltdb_callback": 0x1d1f710
tevent: Added timed event "ltdb_timeout": 0x1d1f830
tevent: Destroying timer event 0x1d1f830 "ltdb_timeout"
tevent: Ending timer event 0x1d1f710 "ltdb_callback"
key added: key=CurrentVersion,key=Windows 
NT,key=Microsoft,key=SOFTWARE,hive=NONE
About to write CurrentVersion with type (null), length 3: 6.1
convert_string_talloc: Conversion not supported.
Error converting string to value for line:
"CurrentVersion"
ERROR(runtime): uncaught exception - (31, 'WERR_GENERAL_FAILURE')
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
line 175, in _run
     return self.run(*args, **kwargs)
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/domain.py",
line 1318, 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
841, in upgrade_from_samba3
     use_ntvfs=use_ntvfs, skip_sysvolacl=True)
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
line 2100, in provision
     setup_registry(paths.hklm, session_info, lp=lp)
   File 
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
line 1002, in setup_registry
     reg.diff_apply(provision_reg)
The connection to the LDAP server was closed

On 07/03/13 16:25, samba-debug at gbif.org wrote:
> Hello,
>
> I've seen this upgrade error posted before:
>
> https://lists.samba.org/archive/samba/2013-January/171022.html
>
> but either there is a different issue or I'm misreading the post.
>
> Basically when I run the classicupgrade (samba3 to 4) on a test 
> machine, I get the following (the full debug output will be at the end 
> of my post):
> .......
> key added: key=CurrentVersion,key=Windows 
> NT,key=Microsoft,key=SOFTWARE,hive=NONE
> About to write CurrentVersion with type (null), length 3: 6.1
> convert_string_talloc: Conversion not supported.
> Error converting string to value for line:
> "CurrentVersion"
> ERROR(runtime): uncaught exception - (31, 'WERR_GENERAL_FAILURE')
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
> line 175, in _run
>     return self.run(*args, **kwargs)
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/domain.py",
> line 1318, 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 841, in upgrade_from_samba3
>     use_ntvfs=use_ntvfs, skip_sysvolacl=True)
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
> line 2100, in provision
>     setup_registry(paths.hklm, session_info, lp=lp)
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
> line 1002, in setup_registry
>     reg.diff_apply(provision_reg)
> The connection to the LDAP server was closed
>
> As suggested by the post referred to above, I've moved my registry.tdb 
> away, but without any effect. I've traced the upgrade and it seems it 
> doesn't look for registry.tdb (or at least I cannot find any attempt 
> to open it).
>
> I would be grateful for any hints!
>
> Thanks!
>
> Best regards,
> Andrei
>
>
> Full debug follows:
>
> # /usr/local/samba/bin/samba-tool domain classicupgrade -d 200 
> --dbdir=/root/work/samba/ --use-xattrs=yes --realm=windom.gbif.org 
> /root/work/smb.conf
> INFO: Current debug levels:
>   all: 200
>   tdb: 200
>   printdrivers: 200
>   lanman: 200
>   smb: 200
>   rpc_parse: 200
>   rpc_srv: 200
>   rpc_cli: 200
>   passdb: 200
>   sam: 200
>   auth: 200
>   winbind: 200
>   vfs: 200
>   idmap: 200
>   quota: 200
>   acls: 200
>   locking: 200
>   msdfs: 200
>   dmapi: 200
>   registry: 200
> Reading smb.conf
> lp_load_ex: refreshing parameters
> Initialising global parameters
> rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
> params.c:pm_process() - Processing configuration file 
> "/root/work/smb.conf"
> Processing section "[global]"
> doing parameter unix charset = LOCALE
> doing parameter unix extensions = off
> doing parameter workgroup = GBIF
> doing parameter netbios name = newaino
> doing parameter server string = GBIF mail and file server
> doing parameter hide dot files = yes
> doing parameter hide unreadable = yes
> doing parameter veto files = /*netlogon*/Maildir/
> doing parameter interfaces = em1 , lo
> doing parameter bind interfaces only = Yes
> doing parameter passdb backend = ldapsam:"ldap://localhost"
> doing parameter username map = /etc/samba/smbusers
> doing parameter log level = 1
> WARNING: The "idmap backend" option is deprecated
> WARNING: The "idmap uid" option is deprecated
> WARNING: The "idmap gid" option is deprecated
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Unknown parameter encountered: "share modes"
> Ignoring unknown parameter "share modes"
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Unknown parameter encountered: "printer admin"
> Ignoring unknown parameter "printer admin"
> Provisioning
> Exporting account policy
> Exporting groups
> Exporting users
> Ignoring group memberships of 'root' 
> S-1-5-21-1963682937-3502233201-1541774305-1000: Unable to enumerate 
> group memberships, (-1073741596,NT_STATUS_INTERNAL_DB_CORRUPTION)
> Next rid = 41026
> Exporting posix attributes
> Reading WINS database
> Looking up IPv4 addresses
> Looking up IPv6 addresses
> No IPv6 address will be assigned
> INFO: Current debug levels:
>   all: 200
>   tdb: 200
>   printdrivers: 200
>   lanman: 200
>   smb: 200
>   rpc_parse: 200
>   rpc_srv: 200
>   rpc_cli: 200
>   passdb: 200
>   sam: 200
>   auth: 200
>   winbind: 200
>   vfs: 200
>   idmap: 200
>   quota: 200
>   acls: 200
>   locking: 200
>   msdfs: 200
>   dmapi: 200
>   registry: 200
> doing parameter idmap_ldb:use rfc2307 = yes
> Processing section "[netlogon]"
> doing parameter path = 
> /usr/local/samba/var/locks/sysvol/windom.gbif.org/scripts
> doing parameter read only = No
> Processing section "[sysvol]"
> add_a_service: Creating snum = 16 for sysvol
> hash_a_service: hashing index 16 for service name sysvol
> doing parameter path = /usr/local/samba/var/locks/sysvol
> doing parameter read only = No
> pm_process() returned Yes
> set_conn_connectpath: service (null), connectpath = /
> Initialising default vfs hooks
> vfs_find_backend_entry called for posixacl
> Successfully added vfs backend 'posixacl'
> vfs_find_backend_entry called for /[Default VFS]/
> Successfully added vfs backend '/[Default VFS]/'
> vfs_find_backend_entry called for dfs_samba4
> Successfully added vfs backend 'dfs_samba4'
> vfs_dfs_samba4: Debug class number of 'fileid': 20
> Initialising custom vfs hooks from [/[Default VFS]/]
> vfs_find_backend_entry called for /[Default VFS]/
> Successfully loaded vfs module [/[Default VFS]/] with the new modules 
> system
> Initialising custom vfs hooks from [acl_xattr]
> vfs_find_backend_entry called for acl_xattr
> vfs module [acl_xattr] not loaded - trying to load...
> Loading module 'acl_xattr'
> Loading module 'acl_xattr': Trying to load from 
> /usr/local/samba/lib/vfs/acl_xattr.so
> Module 'acl_xattr' loaded
> vfs_find_backend_entry called for acl_xattr
> Successfully added vfs backend 'acl_xattr'
> vfs_find_backend_entry called for acl_xattr
> Successfully loaded vfs module [acl_xattr] with the new modules system
> Initialising custom vfs hooks from [dfs_samba4]
> vfs_find_backend_entry called for dfs_samba4
> Successfully loaded vfs module [dfs_samba4] with the new modules system
> Calling acl_set_file: /usr/local/samba/var/locks/sysvol/tmpoEPBWP, 0
> set_conn_connectpath: service (null), connectpath = /
> Initialising default vfs hooks
> Initialising custom vfs hooks from [/[Default VFS]/]
> vfs_find_backend_entry called for /[Default VFS]/
> Successfully loaded vfs module [/[Default VFS]/] with the new modules 
> system
> Initialising custom vfs hooks from [acl_xattr]
> vfs_find_backend_entry called for acl_xattr
> Successfully loaded vfs module [acl_xattr] with the new modules system
> Initialising custom vfs hooks from [dfs_samba4]
> vfs_find_backend_entry called for dfs_samba4
> Successfully loaded vfs module [dfs_samba4] with the new modules system
> Setting up share.ldb
> lpcfg_servicenumber: couldn't find ldb
> Setting up secrets.ldb
> lpcfg_servicenumber: couldn't find ldb
> lpcfg_servicenumber: couldn't find ldb
> Setting up the registry
> ldb: ldb_trace_request: SEARCH
>  dn: @MODULES
>  scope: base
>  expr: (@LIST=*)
>  attr: @LIST
>  control: <NONE>
>
> ldb: ldb_trace_request: (tdb)->search
> tevent: Added timed event "ltdb_callback": 0x1d0ccb0
> tevent: Added timed event "ltdb_timeout": 0x1d0cd60
> tevent: Destroying timer event 0x1d0cd60 "ltdb_timeout"
> tevent: Ending timer event 0x1d0ccb0 "ltdb_callback"
> ldb: no modules required by the db
> ldb: No modules specified for this database
> ldb: ldb_trace_request: REGISTER_CONTROL
> 1.2.840.113556.1.4.1413
>  control: <NONE>
>
> ldb: ldb_asprintf/set_errstring: unable to find module or backend to 
> handle operation: request
> ldb: ldb_trace_request: SEARCH
>  dn: <rootDSE>
>  scope: base
>  expr: (objectClass=*)
>  attr: rootDomainNamingContext
>  attr: configurationNamingContext
>  attr: schemaNamingContext
>  attr: defaultNamingContext
>  control: <NONE>
>
> ldb: ldb_trace_request: (tdb)->search
> tevent: Added timed event "ltdb_callback": 0x1cf2300
> tevent: Added timed event "ltdb_timeout": 0x1cf2440
> ldb: ldb_asprintf/set_errstring: NULL Base DN invalid for a base search
> tevent: Destroying timer event 0x1cf2440 "ltdb_timeout"
> tevent: Ending timer event 0x1cf2300 "ltdb_callback"
> ldb_wrap open of hklm.ldb
> ldb: start ldb transaction (nesting: 0)
> ldb: ldb_trace_request: (tdb)->start_transaction
> ldb: start ldb transaction error: (null)
> ldb: ldb_trace_request: ADD
> dn: @ATTRIBUTES
> changetype: add
> key: CASE_INSENSITIVE
> value: CASE_INSENSITIVE
>
>
>  control: <NONE>
>
> ldb: ldb_trace_request: (tdb)->add
> tevent: Added timed event "ltdb_callback": 0x1cf2500
> tevent: Added timed event "ltdb_timeout": 0x1cf25b0
> tevent: Destroying timer event 0x1cf25b0 "ltdb_timeout"
> tevent: Ending timer event 0x1cf2500 "ltdb_callback"
> ldb: ldb_trace_request: (tdb)->prepare_commit
> ldb: commit ldb transaction (nesting: 0)
> ldb: ldb_trace_request: (tdb)->end_transaction
> tevent: Added timed event "ltdb_callback": 0x1d0ca70
> tevent: Added timed event "ltdb_timeout": 0x1d0cb20
> tevent: Destroying timer event 0x1d0cb20 "ltdb_timeout"
> tevent: Ending timer event 0x1d0ca70 "ltdb_callback"
> Key 'key=SOFTWARE,hive=NONE' not found
> tevent: Added timed event "ltdb_callback": 0x1d14c20
> tevent: Added timed event "ltdb_timeout": 0x1d14d40
> tevent: Destroying timer event 0x1d14d40 "ltdb_timeout"
> tevent: Ending timer event 0x1d14c20 "ltdb_callback"
> key added: key=SOFTWARE,hive=NONE
> tevent: Added timed event "ltdb_callback": 0x1d1ff70
> tevent: Added timed event "ltdb_timeout": 0x1d20020
> tevent: Destroying timer event 0x1d20020 "ltdb_timeout"
> tevent: Ending timer event 0x1d1ff70 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d20b80
> tevent: Added timed event "ltdb_timeout": 0x1d20c30
> tevent: Destroying timer event 0x1d20c30 "ltdb_timeout"
> tevent: Ending timer event 0x1d20b80 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d21740
> tevent: Added timed event "ltdb_timeout": 0x1d217f0
> tevent: Destroying timer event 0x1d217f0 "ltdb_timeout"
> tevent: Ending timer event 0x1d21740 "ltdb_callback"
> Key 'key=Microsoft,key=SOFTWARE,hive=NONE' not found
> tevent: Added timed event "ltdb_callback": 0x1d1fc20
> tevent: Added timed event "ltdb_timeout": 0x1d1fd40
> tevent: Destroying timer event 0x1d1fd40 "ltdb_timeout"
> tevent: Ending timer event 0x1d1fc20 "ltdb_callback"
> key added: key=Microsoft,key=SOFTWARE,hive=NONE
> tevent: Added timed event "ltdb_callback": 0x1d22520
> tevent: Added timed event "ltdb_timeout": 0x1d225d0
> tevent: Destroying timer event 0x1d225d0 "ltdb_timeout"
> tevent: Ending timer event 0x1d22520 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d23030
> tevent: Added timed event "ltdb_timeout": 0x1d230e0
> tevent: Destroying timer event 0x1d230e0 "ltdb_timeout"
> tevent: Ending timer event 0x1d23030 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d16380
> tevent: Added timed event "ltdb_timeout": 0x1d16640
> tevent: Destroying timer event 0x1d16640 "ltdb_timeout"
> tevent: Ending timer event 0x1d16380 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d17210
> tevent: Added timed event "ltdb_timeout": 0x1d172c0
> tevent: Destroying timer event 0x1d172c0 "ltdb_timeout"
> tevent: Ending timer event 0x1d17210 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d17210
> tevent: Added timed event "ltdb_timeout": 0x1d17bf0
> tevent: Destroying timer event 0x1d17bf0 "ltdb_timeout"
> tevent: Ending timer event 0x1d17210 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d18790
> tevent: Added timed event "ltdb_timeout": 0x1d18840
> tevent: Destroying timer event 0x1d18840 "ltdb_timeout"
> tevent: Ending timer event 0x1d18790 "ltdb_callback"
> Key 'key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE' not found
> tevent: Added timed event "ltdb_callback": 0x1d181d0
> tevent: Added timed event "ltdb_timeout": 0x1d16610
> tevent: Destroying timer event 0x1d16610 "ltdb_timeout"
> tevent: Ending timer event 0x1d181d0 "ltdb_callback"
> key added: key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE
> tevent: Added timed event "ltdb_callback": 0x1d19360
> tevent: Added timed event "ltdb_timeout": 0x1d19410
> tevent: Destroying timer event 0x1d19410 "ltdb_timeout"
> tevent: Ending timer event 0x1d19360 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d19e10
> tevent: Added timed event "ltdb_timeout": 0x1d19ec0
> tevent: Destroying timer event 0x1d19ec0 "ltdb_timeout"
> tevent: Ending timer event 0x1d19e10 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1a7e0
> tevent: Added timed event "ltdb_timeout": 0x1d1aaa0
> tevent: Destroying timer event 0x1d1aaa0 "ltdb_timeout"
> tevent: Ending timer event 0x1d1a7e0 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1b6d0
> tevent: Added timed event "ltdb_timeout": 0x1d1b780
> tevent: Destroying timer event 0x1d1b780 "ltdb_timeout"
> tevent: Ending timer event 0x1d1b6d0 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1b6d0
> tevent: Added timed event "ltdb_timeout": 0x1d1c110
> tevent: Destroying timer event 0x1d1c110 "ltdb_timeout"
> tevent: Ending timer event 0x1d1b6d0 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1ccb0
> tevent: Added timed event "ltdb_timeout": 0x1d1cd60
> tevent: Destroying timer event 0x1d1cd60 "ltdb_timeout"
> tevent: Ending timer event 0x1d1ccb0 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1dcf0
> tevent: Added timed event "ltdb_timeout": 0x1d1dda0
> tevent: Destroying timer event 0x1d1dda0 "ltdb_timeout"
> tevent: Ending timer event 0x1d1dcf0 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1dd80
> tevent: Added timed event "ltdb_timeout": 0x1d1e5c0
> tevent: Destroying timer event 0x1d1e5c0 "ltdb_timeout"
> tevent: Ending timer event 0x1d1dd80 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1ccb0
> tevent: Added timed event "ltdb_timeout": 0x1d1f0e0
> tevent: Destroying timer event 0x1d1f0e0 "ltdb_timeout"
> tevent: Ending timer event 0x1d1ccb0 "ltdb_callback"
> tevent: Added timed event "ltdb_callback": 0x1d1e520
> tevent: Added timed event "ltdb_timeout": 0x1d1ccb0
> tevent: Destroying timer event 0x1d1ccb0 "ltdb_timeout"
> tevent: Ending timer event 0x1d1e520 "ltdb_callback"
> Key 'key=CurrentVersion,key=Windows 
> NT,key=Microsoft,key=SOFTWARE,hive=NONE' not found
> tevent: Added timed event "ltdb_callback": 0x1d1f710
> tevent: Added timed event "ltdb_timeout": 0x1d1f830
> tevent: Destroying timer event 0x1d1f830 "ltdb_timeout"
> tevent: Ending timer event 0x1d1f710 "ltdb_callback"
> key added: key=CurrentVersion,key=Windows 
> NT,key=Microsoft,key=SOFTWARE,hive=NONE
> About to write CurrentVersion with type (null), length 3: 6.1
> convert_string_talloc: Conversion not supported.
> Error converting string to value for line:
> "CurrentVersion"
> ERROR(runtime): uncaught exception - (31, 'WERR_GENERAL_FAILURE')
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
> line 175, in _run
>     return self.run(*args, **kwargs)
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/netcmd/domain.py",
> line 1318, 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 841, in upgrade_from_samba3
>     use_ntvfs=use_ntvfs, skip_sysvolacl=True)
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
> line 2100, in provision
>     setup_registry(paths.hklm, session_info, lp=lp)
>   File 
>
"/usr/local/samba/lib64/python2.6/site-packages/samba/provision/__init__.py",
> line 1002, in setup_registry
>     reg.diff_apply(provision_reg)
> The connection to the LDAP server was closed
>
>
I thought I should post the solution to this: in my case, the old 
smb.conf contained

unix charset = LOCALE

Removing that line fixed the error I was encountering.

Cheers,
Andrei