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-144/2018-08-09-0156/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-144/2018-08-09-0156/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-08-09-0156/samba.stdout
  
The top commit at the time of the failure was:

commit 0c8174cf9221ce5635073bb4a29e782f81f67dc5
Author: Volker Lendecke <vl at samba.org>
Date:   Wed Aug 8 10:14:26 2018 +0200

    libsmb: Fix CID 1438243 Unchecked return value
    
    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): Wed Aug  8 23:10:22 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[827(5121)/907 at 1h22m3s] samba4.blackbox.smbclient(offlinebackupdc:local)(offlinebackupdc:local)
[828(5123)/907 at 1h22m4s] samba4.rpc.echo(restoredc)
[829(5133)/907 at 1h22m7s] samba4.rpc.echo(restoredc:local)
[830(5143)/907 at 1h22m11s] samba4.rpc.echo.testallowed(restoredc:local)
[831(5153)/907 at 1h22m14s] samba4.rpc.echo.testdenied(restoredc:local)
[832(5163)/907 at 1h22m18s] samba4.blackbox.smbclient(restoredc:local)(restoredc:local)
[833(5165)/907 at 1h22m18s] samba4.rpc.echo(renamedc)
[834(5175)/907 at 1h22m22s] samba4.rpc.echo(renamedc:local)
[835(5185)/907 at 1h22m26s] samba4.rpc.echo.testallowed(renamedc:local)
[836(5195)/907 at 1h22m29s] samba4.rpc.echo.testdenied(renamedc:local)
[837(5205)/907 at 1h22m32s] samba4.blackbox.smbclient(renamedc:local)(renamedc:local)
[838(5207)/907 at 1h22m33s] samba4.rpc.echo(labdc)
[839(5217)/907 at 1h22m36s] samba4.rpc.echo(labdc:local)
[840(5227)/907 at 1h22m40s] samba4.rpc.echo.testallowed(labdc:local)
[841(5237)/907 at 1h22m40s] samba4.rpc.echo.testdenied(labdc:local)
[842(5247)/907 at 1h22m40s] samba4.blackbox.smbclient(labdc:local)(labdc:local)
[843(5249)/907 at 1h22m41s] samba.tests.samba_tool.rodc(rodc:local)
[844(5258)/907 at 1h23m14s] samba.blackbox.rpcclient_samlogon(rodc:local)
[845(5262)/907 at 1h23m15s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[846(5266)/907 at 1h23m15s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[847(5270)/907 at 1h23m16s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[848(5281)/907 at 1h28m57s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[849(5295)/907 at 1h32m26s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
[850(5299)/907 at 1h32m37s] samba4.drs.replica_sync.python(vampire_dc)(vampire_dc:local)
UNEXPECTED(error): samba4.drs.replica_sync.python(vampire_dc).replica_sync.DrsReplicaSyncTestCase.test_ReplConflictsRemoteWin_with_child(vampire_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b1931505/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/b1931505/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_sync4088522,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) -> 488
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 341
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 278
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 226
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 209
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 199
samba4.ldap.password_lockout.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 182
samba4.ldap.secdesc.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 146
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 135
samba4.raw.notify(ad_dc_ntvfs) -> 106
ERROR: test failed with exit code 1