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-144/2018-11-05-0225/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-144/2018-11-05-0225/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-05-0225/samba.stdout
  
The top commit at the time of the failure was:

commit 7dd3585f9c3ae04df45d98bfdc62663c7a69d3e0
Author: Christof Schmitt <cs at samba.org>
Date:   Fri Nov 2 12:07:58 2018 -0700

    selftest: Run smb2.delete-on-close-perms also with "delete readonly = yes"
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13673
    
    Signed-off-by: Christof Schmitt <cs at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Christof Schmitt <cs at samba.org>
    Autobuild-Date(master): Sat Nov  3 05:55:45 CET 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[751(4035)/850 at 1h23m45s] samba.tests.blackbox.traffic_replay(ad_dc_ntvfs)
[752(4041)/850 at 1h23m59s] samba.tests.blackbox.traffic_learner(ad_dc_ntvfs)
[753(4043)/850 at 1h24m0s] samba.tests.blackbox.traffic_summary(ad_dc_ntvfs)
[754(4043)/850 at 1h24m0s] samba.tests.blackbox.smbcontrol(ad_dc_ntvfs:local)
[755(4045)/850 at 1h24m3s] samba.tests.blackbox.smbcontrol(promoted_dc:local)
[756(4047)/850 at 1h24m4s] samba4.ldap.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[757(4086)/850 at 1h24m19s] samba4.tokengroups.krb5.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[758(4096)/850 at 1h24m31s] samba4.tokengroups.ntlm.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[759(4105)/850 at 1h24m45s] samba4.sam.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[760(4122)/850 at 1h24m50s] samba4.user_account_control.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[761(4133)/850 at 1h25m11s] samba4.schemaInfo.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[762(4135)/850 at 1h25m15s] samba.tests.dsdb_schema_attributes(ad_dc_ntvfs:local)
[763(4141)/850 at 1h25m36s] samba4.urgent_replication.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[764(4149)/850 at 1h25m42s] samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[765(4173)/850 at 1h27m49s] samba4.ldap.match_rules.python(ad_dc_ntvfs)
[766(4207)/850 at 1h28m17s] samba4.ldap.notification.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[767(4210)/850 at 1h28m24s] samba4.ldap.sites.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[768(4221)/850 at 1h28m32s] samba4.ldap.sort.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[769(4228)/850 at 1h28m39s] samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs)
[770(4243)/850 at 1h33m23s] samba4.ldap.linked_attributes.python(ad_dc_ntvfs)(ad_dc_ntvfs:local)
[771(4263)/850 at 1h33m31s] samba4.ldap.rodc.python(rodc)(rodc)
[772(4269)/850 at 1h33m35s] samba4.ldap.rodc_rwdc.python(rodc)(rodc:local)
[773(4289)/850 at 1h41m19s] samba4.drs.replica_sync_rodc.python(rodc)(rodc:local)
[774(4291)/850 at 1h41m27s] samba4.ldap.passwordsettings.python(ad_dc_ntvfs)
[775(4303)/850 at 1h42m8s] samba4.ldap_schema.python(ad_dc_ntvfs)(ad_dc_ntvfs)
GSS client Update(krb5)(1) Update failed:  Miscellaneous failure (see text): Clock skew too great
UNEXPECTED(error): samba4.ldap_schema.python(ad_dc_ntvfs).__main__.SchemaTests.test_generated_mAPIID(ad_dc_ntvfs)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b176302/samba/source4/dsdb/tests/python/ldap_schema.py", line 1162, in test_generated_mAPIID
    self.ldb.modify_ldif(ldif)
  File "bin/python/samba/__init__.py", line 241, in modify_ldif
    self.modify(msg, controls)
LdbError: (3, 'ldb_wait from (null) with LDB_WAIT_ALL: Time limit exceeded (3)')

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) -> 463
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 284
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 239
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 213
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 189
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 156
samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 126
samba.tests.samba_tool.user(ad_dc_ntvfs:local) -> 117
samba4.raw.notify(ad_dc_ntvfs) -> 111
samba.tests.emulate.traffic_packet(ad_dc_ntvfs) -> 110
ERROR: test failed with exit code 1