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-144/2018-12-21-0247/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-144/2018-12-21-0247/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-12-21-0247/samba.stdout
  
The top commit at the time of the failure was:

commit f9c15350998bfcb9e71d3ab225c525c7cf589fca
Author: Andreas Schneider <asn at samba.org>
Date:   Tue Dec 11 14:31:26 2018 +0100

    lib:util: Use memset_s() in data_blob_clear()
    
    Signed-off-by: Andreas Schneider <asn at samba.org>
    Reviewed-by: Stefan Metzmacher <metze at samba.org>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Thu Dec 20 16:11:03 CET 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[787(4839)/853 at 1h29m32s] samba4.rpc.samr.large-dc.two(vampire_dc)
[788(4842)/853 at 1h29m40s] samba4.rpc.echo(rodc)
[789(4852)/853 at 1h29m44s] samba4.rpc.echo(rodc:local)
[790(4862)/853 at 1h29m48s] samba4.rpc.echo.testallowed(rodc:local)
[791(4872)/853 at 1h29m52s] samba4.rpc.echo.testdenied(rodc:local)
[792(4882)/853 at 1h29m55s] samba4.blackbox.smbclient(rodc:local)(rodc:local)
[793(4884)/853 at 1h29m57s] samba.tests.samba_tool.rodc(rodc:local)
[794(4893)/853 at 1h30m28s] samba.blackbox.rpcclient_samlogon(rodc:local)
[795(4897)/853 at 1h30m28s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[796(4901)/853 at 1h30m29s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[797(4905)/853 at 1h30m30s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[798(4916)/853 at 1h35m57s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[799(4930)/853 at 1h39m20s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
[800(4934)/853 at 1h39m33s] samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local)
[801(4950)/853 at 1h44m23s] samba4.drs.delete_object.python(vampire_dc)(vampire_dc)
[802(4952)/853 at 1h44m32s] samba4.drs.fsmo.python(vampire_dc)(vampire_dc)
[803(4957)/853 at 1h44m50s] samba4.drs.repl_move.python(vampire_dc)(vampire_dc)
[804(4978)/853 at 1h47m0s] samba4.drs.getnc_exop.python(vampire_dc)(vampire_dc)
[805(4990)/853 at 1h47m26s] samba4.drs.getnc_unpriv.python(vampire_dc)(vampire_dc)
[806(4994)/853 at 1h47m34s] samba4.drs.linked_attributes_drs.python(vampire_dc)(vampire_dc)
[807(4997)/853 at 1h47m36s] samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc)
[808(5009)/853 at 1h58m25s] samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local)
[809(5023)/853 at 2h6m18s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc)(promoted_dc:local)
[810(5027)/853 at 2h6m52s] samba4.drs.replica_sync.python(promoted_dc)(promoted_dc:local)
UNEXPECTED(error): samba4.drs.replica_sync.python(promoted_dc).replica_sync.DrsReplicaSyncTestCase.test_ReplConflictsRemoteWin_with_child(promoted_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b2020159/samba/source4/torture/drs/python/replica_sync.py", line 278, in test_ReplConflictsRemoteWin_with_child
    self.ou2 = self._create_ou(self.ldb_dc2, "OU=Test Parent Remote Conflict")
  File "/memdisk/autobuild/fl/b2020159/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 Parent Remote Conflict,OU=replica_sync243762,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) -> 649
samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local) -> 473
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 449
samba4.ldap.confidential_attr.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 340
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 327
samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local) -> 290
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 251
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 228
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 203
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 202
ERROR: test failed with exit code 1