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-144/2018-07-27-0752/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-144/2018-07-27-0752/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-27-0752/samba.stdout
  
The top commit at the time of the failure was:

commit 2dffcde408008d2bbac8e796ea7ce770c7e97f63
Author: Volker Lendecke <vl at samba.org>
Date:   Wed Jul 25 17:05:34 2018 +0200

    smbd: Remove "share_mode_entry->lease"
    
    smbstatus was the only user, and this could be solved by adapting
    share_entry_forall.
    
    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): Fri Jul 27 01:42:31 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[808(5026)/889 at 1h17m25s] samba4.rpc.echo(rodc:local)
[809(5036)/889 at 1h17m28s] samba4.rpc.echo.testallowed(rodc:local)
[810(5046)/889 at 1h17m32s] samba4.rpc.echo.testdenied(rodc:local)
[811(5056)/889 at 1h17m35s] samba4.blackbox.smbclient(rodc:local)(rodc:local)
[812(5058)/889 at 1h17m36s] samba4.rpc.echo(restoredc)
[813(5068)/889 at 1h17m39s] samba4.rpc.echo(restoredc:local)
[814(5078)/889 at 1h17m43s] samba4.rpc.echo.testallowed(restoredc:local)
[815(5088)/889 at 1h17m46s] samba4.rpc.echo.testdenied(restoredc:local)
[816(5098)/889 at 1h17m49s] samba4.blackbox.smbclient(restoredc:local)(restoredc:local)
[817(5100)/889 at 1h17m50s] samba4.rpc.echo(renamedc)
[818(5110)/889 at 1h17m53s] samba4.rpc.echo(renamedc:local)
[819(5120)/889 at 1h17m57s] samba4.rpc.echo.testallowed(renamedc:local)
[820(5130)/889 at 1h18m0s] samba4.rpc.echo.testdenied(renamedc:local)
[821(5140)/889 at 1h18m4s] samba4.blackbox.smbclient(renamedc:local)(renamedc:local)
[822(5142)/889 at 1h18m4s] samba4.rpc.echo(labdc)
[823(5152)/889 at 1h18m8s] samba4.rpc.echo(labdc:local)
[824(5162)/889 at 1h18m11s] samba4.rpc.echo.testallowed(labdc:local)
[825(5172)/889 at 1h18m12s] samba4.rpc.echo.testdenied(labdc:local)
[826(5182)/889 at 1h18m12s] samba4.blackbox.smbclient(labdc:local)(labdc:local)
[827(5184)/889 at 1h18m12s] samba.tests.samba_tool.rodc(rodc:local)
[828(5193)/889 at 1h18m43s] samba.blackbox.rpcclient_samlogon(rodc:local)
[829(5197)/889 at 1h18m44s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[830(5201)/889 at 1h18m44s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[831(5205)/889 at 1h18m45s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[832(5216)/889 at 1h24m3s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
UNEXPECTED(error): samba4.drs.samba_tool_drs.python(vampire_dc).samba_tool_drs.SambaToolDrsTests.test_samba_tool_kcc(vampire_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b1568852/samba/source4/torture/drs/python/samba_tool_drs.py", line 80, in test_samba_tool_kcc
    self.cmdline_creds))
  File "bin/python/samba/tests/__init__.py", line 395, in check_output
    raise BlackboxProcessError(retcode, line, stdoutdata, stderrdata)
BlackboxProcessError: Command '/memdisk/autobuild/fl/b1568852/samba/bin/samba-tool drs kcc localdc -USAMBADOMAIN/Administrator%locDCpass1'; exit status 255; stdout: ''; stderr: 'ERROR(runtime): DsExecuteKCC failed - (3221225653, '{Device Timeout} The specified I/O operation on %hs was not completed before the time-out period expired.')
'

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) -> 441
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 317
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 227
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 225
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 200
samba4.ldap.password_lockout.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 165
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 143
samba4.ldap.secdesc.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 111
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 107
samba4.raw.notify(ad_dc_ntvfs) -> 106
ERROR: test failed with exit code 1