[Samba] Replication Never Completes [2nd replication on ... older highwatermark]

[Adam Tauno Williams]

I have gotten a Windows 2008R2 box to promote to an ADC as far as the  
"finish replication later" button... but it never finishes.

The S4 DC it is replicating from runs hot [100%CPU] but the log  
indicates it still gets stuck on a given object -

Feb 14 11:01:52 larkin28 samba[1559]:    
../source4/rpc_server/drsuapi/getncchanges.c:1961: DsGetNCChanges 2nd  
replication on DN DC=micore,DC=us older highwatermark (last_dn  
CN=backbone,CN=services,CN=ypServ30,CN=RpcServices,CN=System,DC=micore,DC=us)
Feb 14 11:02:02 larkin28 samba[1559]: [2017/02/14 11:02:02.747524,  0]  
../source4/rpc_server/drsuapi/getncchanges.c:1961(dcesrv_drsuapi_DsGetNCChanges)
Feb 14 11:02:02 larkin28 samba[1559]:    
../source4/rpc_server/drsuapi/getncchanges.c:1961: DsGetNCChanges 2nd  
replication on DN DC=micore,DC=us older highwatermark (last_dn  
CN=backbone,CN=services,CN=ypServ30,CN=RpcServices,CN=System,DC=micore,DC=us)
Feb 14 11:02:04 larkin28 samba[1559]: [2017/02/14 11:02:04.440763,  0]  
../source4/rpc_server/drsuapi/getncchanges.c:1961(dcesrv_drsuapi_DsGetNCChanges)
Feb 14 11:02:04 larkin28 samba[1559]:    
../source4/rpc_server/drsuapi/getncchanges.c:1961: DsGetNCChanges 2nd  
replication on DN DC=micore,DC=us older highwatermark (last_dn  
CN=backbone,CN=services,CN=ypServ30,CN=RpcServices,CN=System,DC=micore,DC=us)
...
Feb 14 11:13:34 larkin28 samba[1559]:    
../source4/rpc_server/drsuapi/getncchanges.c:1961: DsGetNCChanges 2nd  
replication on DN DC=micore,DC=us older highwatermark (last_dn  
CN=backbone,CN=services,CN=ypServ30,CN=RpcServices,CN=System,DC=micore,DC=us)
Feb 14 11:13:35 larkin28 samba[1559]: [2017/02/14 11:13:35.282095,  0]  
../source4/rpc_server/drsuapi/getncchanges.c:1961(dcesrv_drsuapi_DsGetNCChanges)
Feb 14 11:13:35 larkin28 samba[1559]:    
../source4/rpc_server/drsuapi/getncchanges.c:1961: DsGetNCChanges 2nd  
replication on DN DC=micore,DC=us older highwatermark (last_dn  
CN=backbone,CN=services,CN=ypServ30,CN=RpcServices,CN=System,DC=micore,DC=us)


[root at larkin28 ~]# rpm -qa | grep sernet
sernet-samba-libs-4.5.4-13.el6.x86_64
sernet-samba-4.5.4-13.el6.x86_64
sernet-samba-common-4.5.4-13.el6.x86_64
sernet-samba-libsmbclient0-4.5.4-13.el6.x86_64
sernet-samba-client-4.5.4-13.el6.x86_64
sernet-samba-winbind-4.5.4-13.el6.x86_64
sernet-samba-ad-4.5.4-13.el6.x86_64