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Ing. Claudio Nicora

2018-Jul-09 20:57 UTC

[Samba] Repadmin fails when querying Samba server 4.7.6

I'm trying to fix a replication error that occurs between Win2008R2 
(srvwin) and Samba 4.7.6 DCs (srvsamba).
Event viewer on Win2008R2 server reports that synchronization failed on 
a specific Computer object because of schema version misalignment 
between servers.

I've then used repadmin to compare failing object on the two servers.
Querying the windows server works but it fails querying the Samba server

*************************************
C:\Windows\system32>repadmin /showobjmeta srvwin 
"CN=MYPC,CN=Computers,DC=SAMDOM,DC=LOCAL"

30 entries.
Loc.USN                           Originating DSA  Org.USN 
Org.Time/Date        Ver Attribute
=======                           =============== ========= 
=============        === ========  146459     
edecb709-eff3-45fc-8cbd-6760e0045ca3     10595 2018-07-08
23:16:29    1 objectClass
... lot of other rows ...
  146477      edecb709-eff3-45fc-8cbd-6760e0045ca3     10598 2018-07-08 
23:17:52    1 msDS-SupportedEncryptionTypes
0 entries.
Type    Attribute     Last Mod Time Originating DSA  Loc.USN Org.USN Ver
======= ============  ============= ================= ======= ======= ==        
Distinguished Name
         ============================*************************************
C:\Windows\system32>repadmin /showobjmeta srvsamba 
"CN=MYPC,CN=Computers,DC=SAMDOM,DC=LOCAL"
DsReplicaGetInfo() failed with status 1359 (0x54f):
     An internal error occurred.
*************************************

This is the log capturedon samba serverwhen running repadmin:

[2018/07/09 22:36:18.056211,  3] 
../lib/ldb-samba/ldb_wrap.c:326(ldb_wrap_connect)
   ldb_wrap open of secrets.ldb
[2018/07/09 22:36:18.084253,  3] 
../source4/smbd/service_stream.c:65(stream_terminate_connection)
   Terminating connection - 'ldapsrv_call_wait_done: call->wait_recv() - 
NT_STATUS_LOCAL_DISCONNECT'
[2018/07/09 22:36:18.084815,  2] 
../source4/smbd/process_standard.c:473(standard_terminate)
   standard_terminate: reason[ldapsrv_call_wait_done: call->wait_recv() 
- NT_STATUS_LOCAL_DISCONNECT]
[2018/07/09 22:36:18.091409,  3] 
../lib/ldb-samba/ldb_wrap.c:326(ldb_wrap_connect)
   ldb_wrap open of secrets.ldb
[2018/07/09 22:36:18.093903,  2] 
../source4/smbd/process_standard.c:157(standard_child_pipe_handler)
   Child 13770 () exited with status 0
[2018/07/09 22:36:18.103075,  3] 
../source4/rpc_server/drsuapi/dcesrv_drsuapi.c:89(dcesrv_drsuapi_DsBind)
   ../source4/rpc_server/drsuapi/dcesrv_drsuapi.c:89: doing DsBind with 
system_session
   ../source4/dsdb/kcc/kcc_drs_replica_info.c:160: Failed search for the 
object DN under edecb709-eff3-45fc-8cbd-6760e0045ca3 whose invocationId 
is 
CN=Configuration,DC=SAMDOM,DC=LOCALkccdrs_replica_get_info_obj_metadata2() 
called
[2018/07/09 22:36:18.106306,  0] 
../source4/dsdb/kcc/kcc_drs_replica_info.c:228(kccdrs_replica_get_info_obj_metadata2)
   attribute_id = 0, attribute_name: objectClass
[2018/07/09 22:36:18.106761,  0] 
../source4/dsdb/kcc/kcc_drs_replica_info.c:160(get_dn_from_invocation_id)
[2018/07/09 22:36:18.119609,  3] 
../source4/smbd/service_stream.c:65(stream_terminate_connection)
   Terminating connection - 'dcesrv: NT_STATUS_CONNECTION_RESET'
[2018/07/09 22:36:18.119888,  3] 
../source4/smbd/process_single.c:114(single_terminate)
   single_terminate: reason[dcesrv: NT_STATUS_CONNECTION_RESET]
[2018/07/09 22:36:18.120038,  3] 
../source4/smbd/service_stream.c:65(stream_terminate_connection)
   Terminating connection - 'dcesrv: NT_STATUS_CONNECTION_RESET'
[2018/07/09 22:36:18.120245,  3] 
../source4/smbd/process_single.c:114(single_terminate)
   single_terminate: reason[dcesrv: NT_STATUS_CONNECTION_RESET]


Is this a bug?
How can I fix it?

Ing. Claudio Nicora

2018-Jul-10 07:35 UTC

head link

[Samba] Repadmin fails when querying Samba server 4.7.6

Some other info about this issue.
It's the same as the one described in this bug: 
https://bugzilla.samba.org/show_bug.cgi?id=11415

It seems that replication from Win2008R2 --> Samba works...

****************************************************************
# samba-tool drs showrepl

==== INBOUND NEIGHBORS ===
CN=Schema,CN=Configuration,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 09:17:08 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 09:17:08 2018 CEST

CN=Configuration,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 09:17:08 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 09:17:08 2018 CEST

DC=ForestDnsZones,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 09:20:01 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 09:20:01 2018 CEST

DC=DomainDnsZones,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 09:17:08 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 09:17:08 2018 CEST

DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 09:20:35 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 09:20:35 2018 CEST

==== OUTBOUND NEIGHBORS ===
CN=Schema,CN=Configuration,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Mon Jul  9 22:16:58 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Mon Jul  9 22:16:58 2018 CEST

CN=Configuration,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 09:12:16 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 09:12:16 2018 CEST

DC=ForestDnsZones,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 08:59:05 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 08:59:05 2018 CEST

DC=DomainDnsZones,DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Mon Jul  9 22:16:58 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Mon Jul  9 22:16:58 2018 CEST

DC=SAMDOM,DC=IT
         Default-First-Site-Name\SRVWIN via RPC
                 DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
                 Last attempt @ Tue Jul 10 08:31:27 2018 CEST was successful
                 0 consecutive failure(s).
                 Last success @ Tue Jul 10 08:31:27 2018 CEST

==== KCC CONNECTION OBJECTS ===
Connection --
         Connection name: d7373eb1-82b4-4509-a063-fcdac7b194d9
         Enabled        : TRUE
         Server DNS name : SRVWIN.samdom.local
         Server DN name  : CN=NTDS 
Settings,CN=SRVWIN,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=SAMDOM,DC=IT
                 TransportType: RPC
                 options: 0x00000001
Warning: No NC replicated for Connection!

****************************************************************
...while Samba --> Win2008R2 doesnt:

PS C:\Users\Administrator.SAMDOM> repadmin /showrepl

Repadmin: running command /showrepl against full DC localhost
Default-First-Site-Name\SRVWIN
DSA Options: IS_GC
Site Options: (none)
DSA object GUID: 237cdbec-2e42-4b36-b571-eea51daaa535
DSA invocationID: 6627c041-b55c-4067-9e9b-e7da63be664d

==== INBOUND NEIGHBORS =====================================
DC=SAMDOM,DC=LOCAL
     Default-First-Site-Name\SRVSAMBA via RPC
         DSA object GUID: 8d7e07b2-8e53-4338-bbf7-dfbf866d962d
         Last attempt @ 2018-07-10 08:50:33 failed, result 8418 (0x20e2):
             The replication operation failed because of a schema 
mismatch between the servers involved.
         3 consecutive failure(s).
         Last success @ 2018-07-08 23:18:10.

CN=Configuration,DC=SAMDOM,DC=LOCAL
     Default-First-Site-Name\SRVSAMBA via RPC
         DSA object GUID: 8d7e07b2-8e53-4338-bbf7-dfbf866d962d
         Last attempt @ 2018-07-10 09:12:15 was successful.

CN=Schema,CN=Configuration,DC=SAMDOM,DC=LOCAL
     Default-First-Site-Name\SRVSAMBA via RPC
         DSA object GUID: 8d7e07b2-8e53-4338-bbf7-dfbf866d962d
         Last attempt @ 2018-07-10 08:50:33 was successful.

DC=DomainDnsZones,DC=SAMDOM,DC=LOCAL
     Default-First-Site-Name\SRVSAMBA via RPC
         DSA object GUID: 8d7e07b2-8e53-4338-bbf7-dfbf866d962d
         Last attempt @ 2018-07-10 08:50:32 was successful.

DC=ForestDnsZones,DC=SAMDOM,DC=LOCAL
     Default-First-Site-Name\SRVSAMBA via RPC
         DSA object GUID: 8d7e07b2-8e53-4338-bbf7-dfbf866d962d
         Last attempt @ 2018-07-10 08:59:04 was successful.

Source: Default-First-Site-Name\SRVSAMBA
******* 3 CONSECUTIVE FAILURES since 2018-07-08 23:18:10
Last error: 8418 (0x20e2):
             The replication operation failed because of a schema 
mismatch between the servers involved.

****************************************************************

Shall I join to that bug report?
If yes, is there someone here able to create a bugzilla accout for me or 
shall I send a specific request to bugzilla-maintenance at samba.org?



Il 09/07/2018 22:57, Ing. Claudio Nicora ha scritto:> I'm trying to fix a replication error that occurs between Win2008R2 
> (srvwin) and Samba 4.7.6 DCs (srvsamba).
> Event viewer on Win2008R2 server reports that synchronization failed 
> on a specific Computer object because of schema version misalignment 
> between servers.

Andrew Bartlett

2018-Jul-10 07:41 UTC

head link

[Samba] Repadmin fails when querying Samba server 4.7.6

On Tue, 2018-07-10 at 09:35 +0200, Ing. Claudio Nicora via samba
wrote:> Some other info about this issue.
> It's the same as the one described in this bug: 
> https://bugzilla.samba.org/show_bug.cgi?id=11415
Try with 4.8.3.  We have managed to join Windows 2012R2 with that
release, after doing a Samba-side schema upgrade to the 2012 schema.

Andrew Bartlett

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

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