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-144/2018-08-23-1430/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-144/2018-08-23-1430/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-08-23-1430/samba.stdout
  
The top commit at the time of the failure was:

commit 9c71f61ed8a31d287d343d4f2e68cb40c57a2b89
Author: Jeremy Allison <jra at samba.org>
Date:   Tue Aug 21 12:05:34 2018 -0700

    s3: smbd: Ensure get_real_filename() copes with empty pathnames.
    
    Needed for vfs_glusterfs, as Gluster requires "." not '\0'.
    
    Based on a fix from Anoop C S <anoopcs at redhat.com>
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13585
    
    Signed-off-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Ira Cooper <ira at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Wed Aug 22 21:50:41 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[838(5226)/908 at 1h36m7s] samba4.blackbox.smbclient(renamedc:local)(renamedc:local)
[839(5228)/908 at 1h36m8s] samba4.rpc.echo(labdc)
[840(5238)/908 at 1h36m11s] samba4.rpc.echo(labdc:local)
[841(5248)/908 at 1h36m15s] samba4.rpc.echo.testallowed(labdc:local)
[842(5258)/908 at 1h36m15s] samba4.rpc.echo.testdenied(labdc:local)
[843(5268)/908 at 1h36m15s] samba4.blackbox.smbclient(labdc:local)(labdc:local)
[844(5270)/908 at 1h36m16s] samba.tests.samba_tool.rodc(rodc:local)
[845(5279)/908 at 1h36m46s] samba.blackbox.rpcclient_samlogon(rodc:local)
[846(5283)/908 at 1h36m47s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[847(5287)/908 at 1h36m47s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[848(5291)/908 at 1h36m48s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[849(5302)/908 at 1h42m28s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[850(5316)/908 at 1h45m53s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
[851(5320)/908 at 1h46m7s] samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local)
[852(5336)/908 at 1h49m59s] samba4.drs.delete_object.python(vampire_dc)(vampire_dc)
[853(5338)/908 at 1h50m8s] samba4.drs.fsmo.python(vampire_dc)(vampire_dc)
[854(5343)/908 at 1h50m27s] samba4.drs.repl_move.python(vampire_dc)(vampire_dc)
[855(5364)/908 at 1h52m20s] samba4.drs.getnc_exop.python(vampire_dc)(vampire_dc)
[856(5376)/908 at 1h52m41s] samba4.drs.getnc_unpriv.python(vampire_dc)(vampire_dc)
[857(5380)/908 at 1h52m49s] samba4.drs.linked_attributes_drs.python(vampire_dc)(vampire_dc)
[858(5383)/908 at 1h52m51s] samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc)
[859(5395)/908 at 1h59m26s] samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local)
[860(5409)/908 at 2h2m55s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc)(promoted_dc:local)
[861(5413)/908 at 2h3m6s] samba4.drs.replica_sync.python(promoted_dc)(promoted_dc:local)
UNEXPECTED(error): samba4.drs.replica_sync.python(promoted_dc).replica_sync.DrsReplicaSyncTestCase.test_ReplConflictsRenamedVsNewRemoteWin(promoted_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b3670571/samba/source4/torture/drs/python/replica_sync.py", line 329, in test_ReplConflictsRenamedVsNewRemoteWin
    self.ou2 = self._create_ou(self.ldb_dc2, "OU=Test Remote Rename Conflict")
  File "/memdisk/autobuild/fl/b3670571/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 Remote Rename Conflict,OU=replica_sync5635183,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) -> 441
samba4.drs.link_conflicts.python(vampire_dc)(vampire_dc) -> 394
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 340
samba4.ldap.confidential_attr.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 319
samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local) -> 232
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 228
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 228
samba4.drs.samba_tool_drs.python(promoted_dc)(promoted_dc:local) -> 210
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 206
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 204
ERROR: test failed with exit code 1