autobuild[sn-devel-144]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-144) has detected an intermittent failing test in 
the current master tree.

The autobuild log of the failure is available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-01-1958/flakey.log

The failure seems to be in the "samba" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-01-1958/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-01-1958/samba.stdout
  
The top commit at the time of the failure was:

commit e84b5020a410b9c2cf736efee60ee704f8ea8f9c
Author: Amitay Isaacs <amitay at gmail.com>
Date:   Mon Jun 25 12:56:45 2018 +1000

    ctdb-common: Correctly handle conf->reload()
    
    Configuration reload should reset the values of configuration options
    missing from the config file to default.
    
    Signed-off-by: Amitay Isaacs <amitay at gmail.com>
    Reviewed-by: Martin Schwenke <martin at meltin.net>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Fri Jun 29 15:12:37 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

		Last attempt @ Sun Jul  1 19:51:31 2018 CEST failed, result 8457 (WERR_DS_DRA_SINK_DISABLED)
		3 consecutive failure(s).
		Last success @ Sun Jul  1 19:36:27 2018 CEST

DC=ForestDnsZones,DC=samba,DC=example,DC=com
	Default-First-Site-Name\LOCALVAMPIREDC via RPC
		DSA object GUID: c9bfadb2-e9af-4430-8f07-b0b4054a0ba0
		Last attempt @ Sun Jul  1 19:51:41 2018 CEST failed, result 8457 (WERR_DS_DRA_SINK_DISABLED)
		3 consecutive failure(s).
		Last success @ Sun Jul  1 19:36:27 2018 CEST

DC=ForestDnsZones,DC=samba,DC=example,DC=com
	Default-First-Site-Name\PROMOTEDVDC via RPC
		DSA object GUID: e6f0b63d-f300-409e-a1f2-89ff5608828a
		Last attempt @ Sun Jul  1 19:51:46 2018 CEST failed, result 8457 (WERR_DS_DRA_SINK_DISABLED)
		3 consecutive failure(s).
		Last success @ Sun Jul  1 19:36:27 2018 CEST

CN=Schema,CN=Configuration,DC=samba,DC=example,DC=com
	Default-First-Site-Name\LOCALVAMPIREDC via RPC
		DSA object GUID: c9bfadb2-e9af-4430-8f07-b0b4054a0ba0
		Last attempt @ Sun Jul  1 19:52:26 2018 CEST failed, result 8457 (WERR_DS_DRA_SINK_DISABLED)
		3 consecutive failure(s).
		Last success @ Sun Jul  1 19:41:20 2018 CEST

CN=Schema,CN=Configuration,DC=samba,DC=example,DC=com
	Default-First-Site-Name\PROMOTEDVDC via RPC
		DSA object GUID: e6f0b63d-f300-409e-a1f2-89ff5608828a
		Last attempt @ Sun Jul  1 19:52:31 2018 CEST failed, result 8457 (WERR_DS_DRA_SINK_DISABLED)
		4 consecutive failure(s).
		Last success @ Sun Jul  1 19:36:27 2018 CEST

'; stderr: ''

FAILED (0 failures, 1 errors and 0 unexpected successes in 0 testsuites)

A summary with detailed information can be found in:
  ./bin/ab/summary
TOP 10 slowest tests
samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc) -> 480
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 442
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 305
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 230
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 225
samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local) -> 221
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 199
samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local) -> 192
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 191
samba4.drs.repl_move.python(vampire_dc)(vampire_dc) -> 181
ERROR: test failed with exit code 1