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-144/2019-01-06-0649/flakey.log

The failure seems to be in the "samba-py2" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-06-0649/samba-py2.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-06-0649/samba-py2.stdout
  
The top commit at the time of the failure was:

commit b7d350b45bc032bf1b61f0184500d068631b7329
Author: Bjoern Jacke <bj at sernet.de>
Date:   Wed Nov 28 04:38:44 2018 -0600

    s3:smbd: Fix build on AIX
    
    AIX makes a define of ip_len in netinet/ip.h (sic!)
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13731
    
    Signed-off-by: Bjoern Jacke <bj at sernet.de>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    
    Autobuild-User(master): Andreas Schneider <asn at cryptomilk.org>
    Autobuild-Date(master): Fri Jan  4 16:29:50 CET 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[36(360)/85 at 9m16s] samba.tests.blackbox.traffic_summary.python2(ad_dc_ntvfs)
[37(360)/85 at 9m16s] samba.tests.blackbox.smbcontrol.python2(ad_dc_ntvfs:local)
[38(362)/85 at 9m18s] samba.tests.blackbox.smbcontrol.python2(promoted_dc:local)
[39(364)/85 at 9m19s] samba4.schemaInfo.python(ad_dc_ntvfs).python2(ad_dc_ntvfs)
[40(366)/85 at 9m23s] samba.tests.dsdb_schema_attributes.python2(ad_dc_ntvfs:local)
[41(372)/85 at 9m38s] samba4.ldap.sort.python.python2(ad_dc_ntvfs)
[42(379)/85 at 9m45s] samba4.drs.replica_sync_rodc.python(rodc).python2(rodc:local)
[43(381)/85 at 9m58s] samba4.ldap.passwordsettings.python.python2(ad_dc_ntvfs)
[44(393)/85 at 10m43s] samba4.tombstone_reanimation.python.python2(ad_dc_ntvfs)
[45(405)/85 at 10m51s] samba.tests.upgradeprovisionneeddc.python2(ad_dc_ntvfs:local)
[46(416)/85 at 10m53s] samba.tests.samba_tool.rodc.python2(rodc:local)
[47(425)/85 at 11m27s] samba4.drs.ridalloc_exop.python(vampire_dc).python2(vampire_dc)
[48(436)/85 at 14m11s] samba4.drs.samba_tool_drs.python(vampire_dc).python2(vampire_dc:local)
[49(450)/85 at 16m1s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc).python2(vampire_dc:local)
[50(454)/85 at 16m15s] samba4.drs.replica_sync.python(vampire_dc).python2(vampire_dc:local)
[51(470)/85 at 17m56s] samba4.drs.delete_object.python(vampire_dc).python2(vampire_dc)
[52(472)/85 at 18m5s] samba4.drs.fsmo.python(vampire_dc).python2(vampire_dc)
[53(477)/85 at 18m17s] samba4.drs.repl_move.python(vampire_dc).python2(vampire_dc)
[54(498)/85 at 19m53s] samba4.drs.getnc_exop.python(vampire_dc).python2(vampire_dc)
[55(510)/85 at 20m4s] samba4.drs.getnc_unpriv.python(vampire_dc).python2(vampire_dc)
[56(514)/85 at 20m9s] samba4.drs.link_conflicts.python(vampire_dc).python2(vampire_dc)
[57(526)/85 at 24m4s] samba4.drs.samba_tool_drs.python(promoted_dc).python2(promoted_dc:local)
[58(540)/85 at 25m47s] samba4.drs.samba_tool_drs_showrepl.python(promoted_dc).python2(promoted_dc:local)
[59(544)/85 at 25m57s] samba4.drs.replica_sync.python(promoted_dc).python2(promoted_dc:local)
UNEXPECTED(error): samba4.drs.replica_sync.python(promoted_dc).python2.replica_sync.DrsReplicaSyncTestCase.test_ReplConflictsRemoteWin_with_child(promoted_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b200981/samba-py2/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/b200981/samba-py2/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)
LdbError: (68, 'LDAP error 68 LDAP_ENTRY_ALREADY_EXISTS -  <Entry OU=Test Parent Remote Conflict,OU=replica_sync3308810,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).python2(vampire_dc) -> 234
samba4.drs.ridalloc_exop.python(vampire_dc).python2(vampire_dc) -> 165
samba4.drs.samba_tool_drs.python(vampire_dc).python2(vampire_dc:local) -> 109
samba4.drs.samba_tool_drs.python(promoted_dc).python2(promoted_dc:local) -> 103
samba4.drs.replica_sync.python(vampire_dc).python2(vampire_dc:local) -> 102
samba.tests.emulate.traffic_packet.python2(ad_dc_ntvfs) -> 100
samba4.drs.repl_move.python(vampire_dc).python2(vampire_dc) -> 95
samba.tests.samba_tool.user.python2(ad_dc_ntvfs:local) -> 63
samba4.ldap.passwordsettings.python.python2(ad_dc_ntvfs) -> 46
samba.tests.samba_tool.user_wdigest.python2(ad_dc_ntvfs:local) -> 38
ERROR: test failed with exit code 1