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-144/2018-11-04-0644/flakey.log

The failure seems to be in the "samba-py3" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-04-0644/samba-py3.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-04-0644/samba-py3.stdout
  
The top commit at the time of the failure was:

commit 7dd3585f9c3ae04df45d98bfdc62663c7a69d3e0
Author: Christof Schmitt <cs at samba.org>
Date:   Fri Nov 2 12:07:58 2018 -0700

    selftest: Run smb2.delete-on-close-perms also with "delete readonly = yes"
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13673
    
    Signed-off-by: Christof Schmitt <cs at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Christof Schmitt <cs at samba.org>
    Autobuild-Date(master): Sat Nov  3 05:55:45 CET 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[30(290)/76 at 7m4s] samba.tests.blackbox.traffic_learner.python3(ad_dc_ntvfs)
[31(292)/76 at 7m4s] samba.tests.blackbox.traffic_summary.python3(ad_dc_ntvfs)
[32(292)/76 at 7m5s] samba.tests.blackbox.smbcontrol.python3(ad_dc_ntvfs:local)
[33(294)/76 at 7m6s] samba.tests.blackbox.smbcontrol.python3(promoted_dc:local)
[34(296)/76 at 7m7s] samba4.schemaInfo.python(ad_dc_ntvfs).python3(ad_dc_ntvfs)
[35(298)/76 at 7m10s] samba.tests.dsdb_schema_attributes.python3(ad_dc_ntvfs:local)
[36(304)/76 at 7m22s] samba4.drs.replica_sync_rodc.python(rodc).python3(rodc:local)
[37(306)/76 at 7m59s] samba4.ldap.passwordsettings.python.python3(ad_dc_ntvfs)
[38(318)/76 at 8m40s] samba4.tombstone_reanimation.python.python3(ad_dc_ntvfs)
[39(330)/76 at 8m48s] samba.tests.upgradeprovisionneeddc.python3(ad_dc_ntvfs:local)
[40(341)/76 at 8m50s] samba.tests.samba_tool.rodc.python3(rodc:local)
[41(350)/76 at 9m25s] samba4.drs.ridalloc_exop.python(vampire_dc).python3(vampire_dc)
[42(361)/76 at 12m22s] samba4.drs.samba_tool_drs.python(vampire_dc).python3(vampire_dc:local)
[43(375)/76 at 14m4s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc).python3(vampire_dc:local)
[44(379)/76 at 14m18s] samba4.drs.replica_sync.python(vampire_dc).python3(vampire_dc:local)
[45(395)/76 at 15m37s] samba4.drs.delete_object.python(vampire_dc).python3(vampire_dc)
[46(397)/76 at 15m46s] samba4.drs.fsmo.python(vampire_dc).python3(vampire_dc)
[47(402)/76 at 15m56s] samba4.drs.repl_move.python(vampire_dc).python3(vampire_dc)
[48(423)/76 at 17m29s] samba4.drs.getnc_exop.python(vampire_dc).python3(vampire_dc)
[49(435)/76 at 17m39s] samba4.drs.getnc_unpriv.python(vampire_dc).python3(vampire_dc)
[50(439)/76 at 17m44s] samba4.drs.link_conflicts.python(vampire_dc).python3(vampire_dc)
[51(451)/76 at 21m33s] samba4.drs.samba_tool_drs.python(promoted_dc).python3(promoted_dc:local)
[52(465)/76 at 23m9s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc).python3(promoted_dc:local)
[53(469)/76 at 23m17s] samba4.drs.replica_sync.python(promoted_dc).python3(promoted_dc:local)
UNEXPECTED(error): samba4.drs.replica_sync.python(promoted_dc).python3.replica_sync.DrsReplicaSyncTestCase.test_ReplConflictsRemoteWin_with_child(promoted_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b2911004/samba-py3/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/b2911004/samba-py3/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_sync3350169,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).python3(vampire_dc) -> 229
samba4.drs.ridalloc_exop.python(vampire_dc).python3(vampire_dc) -> 177
samba4.drs.samba_tool_drs.python(vampire_dc).python3(vampire_dc:local) -> 102
samba4.drs.samba_tool_drs.python(promoted_dc).python3(promoted_dc:local) -> 96
samba4.drs.repl_move.python(vampire_dc).python3(vampire_dc) -> 94
samba.tests.emulate.traffic_packet.python3(ad_dc_ntvfs) -> 87
samba4.drs.replica_sync.python(vampire_dc).python3(vampire_dc:local) -> 80
samba.tests.samba_tool.user.python3(ad_dc_ntvfs:local) -> 60
samba4.ldap.passwordsettings.python.python3(ad_dc_ntvfs) -> 41
samba.tests.samba_tool.user_wdigest.python3(ad_dc_ntvfs:local) -> 36
ERROR: test failed with exit code 1