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-144/2018-07-04-1357/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-144/2018-07-04-1357/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-04-1357/samba.stdout
  
The top commit at the time of the failure was:

commit 56d9b1a533b8d3ebd4e686145883c7ed62c08ce0
Author: Amit Kumar <amitkuma at redhat.com>
Date:   Mon Jun 25 18:30:39 2018 +0530

    MAN: Adding entry for net ads lookup
    
    There is no man page description for net ads lookup.
    This PR adds entry for the same.
    
    Signed-off-by: Amit Kumar amitkuma at redhat.com
    Reviewed-by: Ralph Böhme <slow at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Wed Jul  4 07:38:04 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[803(4912)/866 at 1h18m31s] samba4.rpc.echo(restoredc)
[804(4922)/866 at 1h18m34s] samba4.rpc.echo(restoredc:local)
[805(4932)/866 at 1h18m38s] samba4.rpc.echo.testallowed(restoredc:local)
[806(4942)/866 at 1h18m41s] samba4.rpc.echo.testdenied(restoredc:local)
[807(4952)/866 at 1h18m44s] samba4.blackbox.smbclient(restoredc:local)(restoredc:local)
[808(4954)/866 at 1h18m45s] samba.tests.samba_tool.rodc(rodc:local)
[809(4963)/866 at 1h19m17s] samba.blackbox.rpcclient_samlogon(rodc:local)
[810(4967)/866 at 1h19m18s] samba.blackbox.rpcclient_samlogon_testallowed(rodc:local)
[811(4971)/866 at 1h19m18s] samba.blackbox.rpcclient_samlogon_testdenied(rodc:local)
[812(4975)/866 at 1h19m19s] samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc)
[813(4986)/866 at 1h24m50s] samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local)
[814(5000)/866 at 1h28m21s] samba4.drs.samba_tool_drs_showrepl.python(vampire_dc)(vampire_dc:local)
server CN=TESTLOCALVAMPIR\0ADEL:e310b04e-80f8-44ce-baea-a45fff1d9eef,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=example,DC=com has no dNSHostName
server CN=TESTLOCALVAMPIR\0ADEL:e310b04e-80f8-44ce-baea-a45fff1d9eef,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=example,DC=com has no dNSHostName
server CN=TESTLOCALVAMPIR\0ADEL:e310b04e-80f8-44ce-baea-a45fff1d9eef,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=example,DC=com has no dNSHostName
server CN=TESTLOCALVAMPIR\0ADEL:e310b04e-80f8-44ce-baea-a45fff1d9eef,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=example,DC=com has no dNSHostName
server CN=TESTLOCALVAMPIR\0ADEL:e310b04e-80f8-44ce-baea-a45fff1d9eef,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=example,DC=com has no dNSHostName
UNEXPECTED(error): samba4.drs.samba_tool_drs_showrepl.python(vampire_dc).samba_tool_drs_showrepl.SambaToolDrsShowReplTests.test_samba_tool_showrepl_pull_summary_all_good(vampire_dc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b3430792/samba/source4/torture/drs/python/samba_tool_drs_showrepl.py", line 240, in test_samba_tool_showrepl_pull_summary_all_good
    (self.dc1, self.cmdline_creds))
  File "bin/python/samba/tests/__init__.py", line 384, in check_output
    raise BlackboxProcessError(retcode, line, stdoutdata, stderrdata)
BlackboxProcessError: Command '/memdisk/autobuild/fl/b3430792/samba/bin/samba-tool drs showrepl --pull-summary localdc -USAMBADOMAIN/Administrator%locDCpass1'; exit status 1; stdout: 'There are failing connections
Failing inbound connection:
DC=samba,DC=example,DC=com
	Default-First-Site-Name\PROMOTEDVDC via RPC
		DSA object GUID: 0469549b-f006-4304-a402-8bb1bb478884
		Last attempt @ Wed Jul  4 13:54:56 2018 CEST failed, result 8457 (WERR_DS_DRA_SINK_DISABLED)
		1 consecutive failure(s).
		Last success @ Wed Jul  4 13:52:07 2018 CEST

'; stderr: ''

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) -> 476
samba4.drs.ridalloc_exop.python(vampire_dc)(vampire_dc) -> 331
samba4.ldap.vlv.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 231
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_ntvfs) -> 226
samba4.drs.samba_tool_drs.python(vampire_dc)(vampire_dc:local) -> 211
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_ntvfs) -> 200
samba4.ldap.password_lockout.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 170
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 146
samba4.ldap.secdesc.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 143
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 129
ERROR: test failed with exit code 1