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-144/2019-01-14-2031/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-144/2019-01-14-2031/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-14-2031/samba.stdout
  
The top commit at the time of the failure was:

commit 792b8d3f8338988c2288bc3dc58e72cacbba2154
Author: Tim Beale <timbeale at catalyst.net.nz>
Date:   Thu Dec 13 17:31:23 2018 +1300

    netcmd: Change domain backup commands to use s3 SMB Py bindings
    
    This means we can now backup a DC that has SMBv1 disabled.
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13676
    
    Signed-off-by: Tim Beale <timbeale at catalyst.net.nz>
    Reviewed-by: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
    
    Autobuild-User(master): Tim Beale <timbeale at samba.org>
    Autobuild-Date(master): Mon Jan 14 06:49:09 CET 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[787(4855)/853 at 1h34m44s] samba4.rpc.samr.large-dc.two(vampire_dc)
[788(4858)/853 at 1h34m57s] samba4.rpc.echo(rodc)
[789(4868)/853 at 1h35m1s] samba4.rpc.echo(rodc:local)
[790(4878)/853 at 1h35m5s] samba4.rpc.echo.testallowed(rodc:local)
[791(4888)/853 at 1h35m8s] samba4.rpc.echo.testdenied(rodc:local)
[792(4898)/853 at 1h35m12s] samba4.blackbox.smbclient(rodc:local)(rodc:local)
[793(4900)/853 at 1h35m13s] samba.tests.samba_tool.rodc(rodc:local)
[794(4909)/853 at 1h35m51s] samba.blackbox.rpcclient_samlogon(rodc:local)
[795(4913)/853 at 1h35m52s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[796(4917)/853 at 1h35m52s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[797(4921)/853 at 1h35m53s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[798(4932)/853 at 1h42m4s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[799(4946)/853 at 1h45m52s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
[800(4950)/853 at 1h46m4s] samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local)
[801(4966)/853 at 1h50m10s] samba4.drs.delete_object.python(vampire_dc)(vampire_dc)
[802(4968)/853 at 1h50m19s] samba4.drs.fsmo.python(vampire_dc)(vampire_dc)
[803(4973)/853 at 1h50m38s] samba4.drs.repl_move.python(vampire_dc)(vampire_dc)
[804(4994)/853 at 1h52m35s] samba4.drs.getnc_exop.python(vampire_dc)(vampire_dc)
[805(5006)/853 at 1h52m58s] samba4.drs.getnc_unpriv.python(vampire_dc)(vampire_dc)
[806(5010)/853 at 1h53m5s] samba4.drs.linked_attributes_drs.python(vampire_dc)(vampire_dc)
[807(5013)/853 at 1h53m6s] samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc)
[808(5025)/853 at 2h2m13s] samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local)
[809(5039)/853 at 2h5m45s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc)(promoted_dc:local)
[810(5043)/853 at 2h6m2s] samba4.drs.replica_sync.python(promoted_dc)(promoted_dc:local)
UNEXPECTED(error): samba4.drs.replica_sync.python(promoted_dc).replica_sync.DrsReplicaSyncTestCase.test_ReplConflictsRemoteWin(promoted_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b1528465/samba/source4/torture/drs/python/replica_sync.py", line 200, in test_ReplConflictsRemoteWin
    self.ou2 = self._create_ou(self.ldb_dc2, "OU=Test Remote Conflict")
  File "/memdisk/autobuild/fl/b1528465/samba/source4/torture/drs/python/replica_sync.py", line 126, in _create_ou
    samdb.add_ldif(ldif)
  File "bin/python/samba/__init__.py", line 230, in add_ldif
    self.add(msg, controls)
_ldb.LdbError: (68, 'LDAP error 68 LDAP_ENTRY_ALREADY_EXISTS -  <Entry OU=Test Remote Conflict,OU=replica_sync6994172,DC=samba,DC=example,DC=com already exists> <>')

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.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 591
samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc) -> 546
samba4.ldap.confidential_attr.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 504
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 371
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 367
samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local) -> 246
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 228
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 226
samba4.ldap.password_lockout.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 225
samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local) -> 213
ERROR: test failed with exit code 1