[Samba] Fwd: How to keep samba4 dc work fine when windows dc offline?

[Sense Zeng]

How could I remove the Win2003 DC? I try to run dcpromo in
Win2003 DC, it aways tell me:

The operation failed because:
Active Directory could not find another domain controller to transfer the
remaining data in directory partition DC=ForestDnsZones,DC=dotest,DC=com.
"The specified domain either does not exist or could not be contacted."

And there are following errors log by the Samba4 DC log.samba:

...
[2013/11/15 10:52:56.646808,  0] ../source4/dsdb/repl/drepl_
out_helpers.c:840(dreplsrv_update_refs_done)
  UpdateRefs failed with WERR_DS_DRA_BUSY/NT code 0xc00020f6 for
de9d1c2e-5584-4b33-b99d-330ae93b9d9d._msdcs.dotest.com

CN=Schema,CN=Configuration,DC=dotest,DC=com
[2013/11/15 10:52:57.106829,  0]
../source4/dsdb/repl/drepl_out_helpers.c:840(dreplsrv_update_refs_done)
  UpdateRefs failed with WERR_DS_DRA_BUSY/NT code 0xc00020f6 for
de9d1c2e-5584-4b33-b99d-330ae93b9d9d._msdcs.dotest.com

CN=Configuration,DC=dotest,DC=com
[2013/11/15 10:52:58.301792,  0]
../source4/dsdb/repl/drepl_out_helpers.c:840(dreplsrv_update_refs_done)
  UpdateRefs failed with WERR_DS_DRA_BUSY/NT code 0xc00020f6 for
de9d1c2e-5584-4b33-b99d-330ae93b9d9d._msdcs.dotest.com

DC=dotest,DC=com
...