[Samba] replication stuck?

Joachim Lindenberg samba at lindenberg.one
Fri Jul 19 14:54:05 UTC 2019


Until yesterday replication between my two DCs (boa and cobra) was running fine. Now I am observing one direction boa->cobra being stuck. I noticed this with a  missing update of a DNS entry, but samba-tool drs showrepl confirms…

 

Output of cobra shows plenty entries like the following (including just he first of each type):

 

==== INBOUND NEIGHBORS ====

 

DC=DomainDnsZones,DC=samba,DC=lindenberg,DC=one

        Default-First-Site-Name\BOA via RPC

                DSA object GUID: a0c6a86f-61da-4b05-8510-5d7af2cc34b7

                Last attempt @ Fri Jul 19 16:46:13 2019 CEST failed, result 1311 (WERR_NO_LOGON_SERVERS)

                709 consecutive failure(s).

                Last success @ NTTIME(0)

…

==== OUTBOUND NEIGHBORS ====

 

DC=DomainDnsZones,DC=samba,DC=lindenberg,DC=one

        Default-First-Site-Name\BOA via RPC

                DSA object GUID: a0c6a86f-61da-4b05-8510-5d7af2cc34b7

                Last attempt @ Fri Jul 19 16:50:47 2019 CEST failed, result 1311 (WERR_NO_LOGON_SERVERS)

                25 consecutive failure(s).

                Last success @ NTTIME(0)

 

…

==== KCC CONNECTION OBJECTS ====

 

Connection --

        Connection name: 8327eca6-ffbc-4c3e-ad29-f5a0ddbbd976

        Enabled        : TRUE

        Server DNS name : boa.samba.lindenberg.one

        Server DN name  : CN=NTDS Settings,CN=BOA,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=lindenberg,DC=one

                TransportType: RPC

                options: 0x00000001

Warning: No NC replicated for Connection!

 

/var/log/samba/log.samba ends with repeated entries

 

[2019/07/19 16:51:17.781888,  0] ../../source4/librpc/rpc/dcerpc_util.c:737(dcerpc_pipe_auth_recv)

  Failed to bind to uuid e3514235-4b06-11d1-ab04-00c04fc2dcd2 for ncacn_ip_tcp:fd00::215:5dff:feb1:c20[49153,seal,krb5,target_hostname=a0c6a86f-61da-4b05-8510-5d7af2cc34b7._msdcs.samba.lindenberg.one,target_principal=GC/boa.samba.lindenberg.one/samba.lindenberg.one,abstract_syntax=e3514235-4b06-11d1-ab04-00c04fc2dcd2/0x00000004,localaddress=fd00::215:5dff:fe74:d707] NT_STATUS_NO_LOGON_SERVERS

 

Reboots didn´t help..

Please advise.

Thanks, Joachim Lindenberg

 



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