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-144/2018-06-24-1401/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-144/2018-06-24-1401/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-06-24-1401/samba.stdout
  
The top commit at the time of the failure was:

commit 05b54cc259645f69e14de2703724c284ed25838c
Author: Volker Lendecke <vl at samba.org>
Date:   Fri Jun 22 16:25:10 2018 +0200

    talloc_stack: Call talloc destructors while frame is still around
    
    This fixes "samba-tool ntacl set -d10"
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Sat Jun 23 04:56:44 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[794(4862)/855 at 1h11m54s] samba4.rpc.samr.large-dc.two(vampire_dc)
[795(4865)/855 at 1h12m3s] samba4.rpc.echo(rodc)
[796(4875)/855 at 1h12m7s] samba4.rpc.echo(rodc:local)
[797(4885)/855 at 1h12m10s] samba4.rpc.echo.testallowed(rodc:local)
[798(4895)/855 at 1h12m14s] samba4.rpc.echo.testdenied(rodc:local)
[799(4905)/855 at 1h12m17s] samba4.blackbox.smbclient(rodc:local)(rodc:local)
[800(4907)/855 at 1h12m18s] samba.tests.samba_tool.rodc(rodc:local)
[801(4916)/855 at 1h12m48s] samba.blackbox.rpcclient_samlogon(rodc:local)
[802(4920)/855 at 1h12m49s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[803(4924)/855 at 1h12m50s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[804(4928)/855 at 1h12m50s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[805(4939)/855 at 1h17m56s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[806(4953)/855 at 1h21m7s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
[807(4955)/855 at 1h21m10s] samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local)
[808(4971)/855 at 1h24m52s] samba4.drs.delete_object.python(vampire_dc)(vampire_dc)
[809(4973)/855 at 1h26m44s] samba4.drs.fsmo.python(vampire_dc)(vampire_dc)
[810(4978)/855 at 1h27m0s] samba4.drs.repl_move.python(vampire_dc)(vampire_dc)
[811(4999)/855 at 1h28m56s] samba4.drs.getnc_exop.python(vampire_dc)(vampire_dc)
[812(5011)/855 at 1h29m18s] samba4.drs.getnc_unpriv.python(vampire_dc)(vampire_dc)
[813(5015)/855 at 1h29m24s] samba4.drs.linked_attributes_drs.python(vampire_dc)(vampire_dc)
[814(5018)/855 at 1h29m26s] samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc)
[815(5030)/855 at 1h37m21s] samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local)
[816(5044)/855 at 1h40m33s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc)(promoted_dc:local)
[817(5046)/855 at 1h40m36s] 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/b4085933/samba/source4/torture/drs/python/replica_sync.py", line 277, in test_ReplConflictsRemoteWin_with_child
    self.ou2 = self._create_ou(self.ldb_dc2, "OU=Test Parent Remote Conflict")
  File "/memdisk/autobuild/fl/b4085933/samba/source4/torture/drs/python/replica_sync.py", line 125, 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 Parent Remote Conflict,OU=replica_sync7090147,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) -> 476
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 443
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 306
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 233
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 224
samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local) -> 223
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 200
samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local) -> 191
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 190
samba4.ldap.password_lockout.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 160
ERROR: test failed with exit code 1