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-144/2018-05-09-1333/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-144/2018-05-09-1333/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-05-09-1333/samba.stdout
  
The top commit at the time of the failure was:

commit 4b793d97642c9831e7f80dfed1d4ec8169a184ff
Author: Simo Sorce <idra at samba.org>
Date:   Mon May 7 08:04:17 2018 -0400

    Fix Jean François name to be UTF-8
    
    Signed-off-by: Simo Sorce <idra at samba.org>
    Reviewed-by: Ralph Boehme <slow at samba.org>
    
    Autobuild-User(master): Ralph Böhme <slow at samba.org>
    Autobuild-Date(master): Wed May  9 10:38:57 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[741(3922)/843 at 46m26s] samba.tests.py_credentials(ad_dc_ntvfs)
[742(3930)/843 at 46m30s] samba.tests.py_credentials(vampire_dc)
[743(3938)/843 at 46m32s] samba.tests.py_credentials(promoted_dc)
[744(3946)/843 at 47m7s] samba.tests.emulate.traffic(ad_dc_ntvfs)
[745(3948)/843 at 47m7s] samba.tests.emulate.traffic_packet(ad_dc_ntvfs)
[746(4037)/843 at 48m16s] samba.tests.blackbox.traffic_replay(ad_dc_ntvfs)
[747(4043)/843 at 48m26s] samba.tests.blackbox.traffic_learner(ad_dc_ntvfs)
[748(4045)/843 at 48m26s] samba.tests.blackbox.traffic_summary(ad_dc_ntvfs)
[749(4045)/843 at 48m26s] samba.tests.blackbox.smbcontrol(ad_dc_ntvfs:local)
[750(4047)/843 at 48m28s] samba.tests.blackbox.smbcontrol(promoted_dc:local)
[751(4049)/843 at 48m29s] samba4.ldap.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[752(4088)/843 at 48m41s] samba4.tokengroups.krb5.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[753(4098)/843 at 48m49s] samba4.tokengroups.ntlm.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[754(4107)/843 at 48m57s] samba4.sam.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[755(4124)/843 at 49m0s] samba4.user_account_control.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[756(4135)/843 at 49m14s] samba4.schemaInfo.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[757(4137)/843 at 49m17s] samba.tests.dsdb_schema_attributes(ad_dc_ntvfs:local)
[758(4142)/843 at 49m31s] samba4.urgent_replication.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[759(4150)/843 at 49m34s] samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[760(4174)/843 at 51m7s] samba4.ldap.match_rules.python(ad_dc_ntvfs)
[761(4208)/843 at 51m34s] samba4.ldap.notification.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[762(4211)/843 at 51m40s] samba4.ldap.sites.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[763(4222)/843 at 51m47s] samba4.ldap.sort.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[764(4229)/843 at 51m55s] samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[765(4244)/843 at 1h3m21s] samba4.ldap.linked_attributes.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[766(4264)/843 at 1h3m27s] samba4.ldap.rodc.python(rodc)(rodc)
[767(4270)/843 at 1h3m30s] samba4.ldap.rodc_rwdc.python(rodc)(rodc:local)
[768(4290)/843 at 1h10m44s] samba4.drs.replica_sync_rodc.python(rodc)(rodc:local)
[769(4292)/843 at 1h10m53s] samba4.ldap_schema.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[770(4318)/843 at 1h14m0s] samba4.ldap.possibleInferiors.python(ad_dc_ntvfs)(ad_dc_ntvfs)
UNEXPECTED(failure): samba4.ldap.possibleInferiors.python(ad_dc_ntvfs).objectClass.dfsConfiguration(ad_dc_ntvfs)
REASON: Exception: Exception: Returned incorrect list for objectclass dfsConfiguration
search:      ['fTDfs', 'msDFS-NamespaceAnchor'

FAILED (1 failures, 0 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.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 685
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 434
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 224
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 200
samba4.ldap_schema.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 187
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 136
samba4.raw.notify(ad_dc_ntvfs) -> 107
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 102
samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 93
samba4.rpc.samlogon on ncacn_np with (ad_dc_ntvfs) -> 74
ERROR: test failed with exit code 1