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-144/2018-04-09-2005/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-144/2018-04-09-2005/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-09-2005/samba.stdout
  
The top commit at the time of the failure was:

commit 5bba8c393d78235111cc5d744bb393847ca16283
Author: Ralph Wuerthner <ralph.wuerthner at de.ibm.com>
Date:   Thu Mar 29 10:00:41 2018 +0200

    s3:smb2_tcon: Add check to prevent non-DFS clients from connecting to an msdfs proxy.
    
    Signed-off-by: Ralph Wuerthner <ralph.wuerthner at de.ibm.com>
    Reviewed-by: David Disseldorp <ddiss at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Sat Apr  7 05:05:22 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[729(3889)/831 at 1h2m35s] samba.tests.py_credentials(ad_dc_ntvfs)
[730(3897)/831 at 1h2m41s] samba.tests.py_credentials(vampire_dc)
[731(3905)/831 at 1h2m44s] samba.tests.py_credentials(promoted_dc)
[732(3913)/831 at 1h3m38s] samba.tests.emulate.traffic(ad_dc_ntvfs)
[733(3915)/831 at 1h3m38s] samba.tests.emulate.traffic_packet(ad_dc_ntvfs)
[734(4004)/831 at 1h5m27s] samba.tests.blackbox.traffic_replay(ad_dc_ntvfs)
[735(4010)/831 at 1h5m43s] samba.tests.blackbox.traffic_learner(ad_dc_ntvfs)
[736(4012)/831 at 1h5m44s] samba.tests.blackbox.traffic_summary(ad_dc_ntvfs)
[737(4012)/831 at 1h5m44s] samba.tests.blackbox.smbcontrol(ad_dc_ntvfs:local)
[738(4014)/831 at 1h5m53s] samba.tests.blackbox.smbcontrol(promoted_dc:local)
[739(4016)/831 at 1h5m57s] samba4.ldap.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[740(4055)/831 at 1h6m11s] samba4.tokengroups.krb5.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[741(4065)/831 at 1h6m24s] samba4.tokengroups.ntlm.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[742(4074)/831 at 1h6m37s] samba4.sam.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[743(4091)/831 at 1h6m43s] samba4.user_account_control.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[744(4102)/831 at 1h7m6s] samba4.schemaInfo.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[745(4104)/831 at 1h7m11s] samba.tests.dsdb_schema_attributes(ad_dc_ntvfs:local)
[746(4109)/831 at 1h7m37s] samba4.urgent_replication.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[747(4117)/831 at 1h7m42s] samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[748(4141)/831 at 1h9m53s] samba4.ldap.match_rules.python(ad_dc_ntvfs)
[749(4175)/831 at 1h10m42s] samba4.ldap.notification.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[750(4178)/831 at 1h10m53s] samba4.ldap.sites.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[751(4189)/831 at 1h11m5s] samba4.ldap.sort.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[752(4196)/831 at 1h11m20s] samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[753(4211)/831 at 1h24m51s] samba4.ldap.linked_attributes.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[754(4231)/831 at 1h24m59s] samba4.ldap.rodc.python(rodc)(rodc)
[755(4237)/831 at 1h25m3s] samba4.ldap.rodc_rwdc.python(rodc)(rodc:local)
[756(4257)/831 at 1h32m26s] samba4.drs.replica_sync_rodc.python(rodc)(rodc:local)
[757(4259)/831 at 1h32m35s] samba4.ldap_schema.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[758(4285)/831 at 1h38m45s] samba4.ldap.possibleInferiors.python(ad_dc_ntvfs)(ad_dc_ntvfs)
UNEXPECTED(failure): samba4.ldap.possibleInferiors.python(ad_dc_ntvfs).objectClass.testClass152329284635652(ad_dc_ntvfs)
REASON: Exception: Exception: Returned incorrect list for objectclass testClass152329284635652
search:      [

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) -> 812
samba4.ldap.rodc_rwdc.python(rodc)(rodc:local) -> 442
samba4.ldap_schema.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 370
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 226
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 200
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 151
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 132
samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 131
samba4.raw.notify(ad_dc_ntvfs) -> 110
samba.tests.samba_tool.user(ad_dc_ntvfs:local) -> 110
ERROR: test failed with exit code 1