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-144/2018-11-02-0815/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-144/2018-11-02-0815/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-02-0815/samba.stdout
  
The top commit at the time of the failure was:

commit 28826ec49cc9f90ec514e9398d9bcf7f46a99a56
Author: Gary Lockyer <gary at catalyst.net.nz>
Date:   Wed Sep 19 15:01:22 2018 +1200

    WHATSNEW: KDC prefork support
    
    Signed-off-by: Gary Lockyer <gary at catalyst.net.nz>
    
    Autobuild-User(master): Gary Lockyer <gary at samba.org>
    Autobuild-Date(master): Fri Nov  2 03:47:57 CET 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[787(4801)/850 at 1h22m27s] samba4.rpc.samr.large-dc.two(vampire_dc)
[788(4804)/850 at 1h22m36s] samba4.rpc.echo(rodc)
[789(4814)/850 at 1h22m40s] samba4.rpc.echo(rodc:local)
[790(4824)/850 at 1h22m44s] samba4.rpc.echo.testallowed(rodc:local)
[791(4834)/850 at 1h22m47s] samba4.rpc.echo.testdenied(rodc:local)
[792(4844)/850 at 1h22m51s] samba4.blackbox.smbclient(rodc:local)(rodc:local)
[793(4846)/850 at 1h22m52s] samba.tests.samba_tool.rodc(rodc:local)
[794(4855)/850 at 1h23m23s] samba.blackbox.rpcclient_samlogon(rodc:local)
[795(4859)/850 at 1h23m23s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[796(4863)/850 at 1h23m24s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[797(4867)/850 at 1h23m24s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[798(4878)/850 at 1h28m49s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[799(4892)/850 at 1h32m10s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
[800(4896)/850 at 1h32m21s] samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local)
[801(4912)/850 at 1h36m7s] samba4.drs.delete_object.python(vampire_dc)(vampire_dc)
[802(4914)/850 at 1h36m17s] samba4.drs.fsmo.python(vampire_dc)(vampire_dc)
[803(4919)/850 at 1h36m33s] samba4.drs.repl_move.python(vampire_dc)(vampire_dc)
[804(4940)/850 at 1h38m27s] samba4.drs.getnc_exop.python(vampire_dc)(vampire_dc)
[805(4952)/850 at 1h38m48s] samba4.drs.getnc_unpriv.python(vampire_dc)(vampire_dc)
[806(4956)/850 at 1h38m55s] samba4.drs.linked_attributes_drs.python(vampire_dc)(vampire_dc)
[807(4959)/850 at 1h38m57s] samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc)
[808(4971)/850 at 1h46m51s] samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local)
[809(4985)/850 at 1h50m13s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc)(promoted_dc:local)
[810(4989)/850 at 1h50m22s] 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/b3769521/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/b3769521/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)
LdbError: (68, 'LDAP error 68 LDAP_ENTRY_ALREADY_EXISTS -  <Entry OU=Test Remote Conflict,OU=replica_sync6716368,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.drs.link_conflicts.python(vampire_dc)(vampire_dc) -> 475
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 453
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 324
samba4.ldap.confidential_attr.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 307
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 233
samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local) -> 226
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 226
samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local) -> 202
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 201
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 201
ERROR: test failed with exit code 1