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-144/2019-01-20-0637/flakey.log

The failure seems to be in the "samba-py2" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-20-0637/samba-py2.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-20-0637/samba-py2.stdout
  
The top commit at the time of the failure was:

commit 0628ca2a558871402f9a17cc7f7a0c69d857ae19
Author: Lukas Slebodnik <lslebodn at fedoraproject.org>
Date:   Fri Jan 18 16:38:03 2019 +0100

    tdb: Fix compatibility of wscript with older python
    
    Traceback (most recent call last):
      File "tdb-1.3.17/third_party/waf/waflib/Scripting.py", line 158, in waf_entry_point
        run_commands()
      File "tdb-1.3.17/third_party/waf/waflib/Scripting.py", line 251, in run_commands
        ctx = run_command(cmd_name)
      File "tdb-1.3.17/third_party/waf/waflib/Scripting.py", line 235, in run_command
        ctx.execute()
      File "tdb-1.3.17/third_party/waf/waflib/Context.py", line 204, in execute
        self.recurse([os.path.dirname(g_module.root_path)])
      File "tdb-1.3.17/third_party/waf/waflib/Context.py", line 286, in recurse
        user_function(self)
      File "tdb-1.3.17/wscript", line 225, in testonly
        cmd = "BINDIR={} {}".format(blddir, sh_test)
    ValueError: zero length field name in format
    
    Signed-off-by: Lukas Slebodnik <lslebodn at fedoraproject.org>
    Reviewed-by: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Sun Jan 20 03:49:59 CET 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

    self.assertCmdSuccess(result, out, err)
  File "bin/python/samba/tests/samba_tool/base.py", line 109, in assertCmdSuccess
    exit, out, err, msg))
AssertionError: exit[-1] stdout[] stderr[INFO 2019-01-20 06:35:18,184 pid:1058523 bin/python/samba/join.py #1519: workgroup is SAMBADOMAIN
INFO 2019-01-20 06:35:18,184 pid:1058523 bin/python/samba/join.py #1522: realm is samba.example.com
INFO 2019-01-20 06:35:19,122 pid:1058523 bin/python/samba/provision/__init__.py #2079: Looking up IPv4 addresses
WARNING 2019-01-20 06:35:19,123 pid:1058523 bin/python/samba/provision/__init__.py #2089: No IPv4 address will be assigned
INFO 2019-01-20 06:35:19,123 pid:1058523 bin/python/samba/provision/__init__.py #2096: Looking up IPv6 addresses
WARNING 2019-01-20 06:35:19,124 pid:1058523 bin/python/samba/provision/__init__.py #2103: No IPv6 address will be assigned
INFO 2019-01-20 06:35:19,642 pid:1058523 bin/python/samba/provision/__init__.py #2269: Setting up share.ldb
INFO 2019-01-20 06:35:19,645 pid:1058523 bin/python/samba/provision/__init__.py #2273: Setting up secrets.ldb
INFO 2019-01-20 06:35:19,651 pid:1058523 bin/python/samba/provision/__init__.py #2279: Setting up the registry
INFO 2019-01-20 06:35:19,666 pid:1058523 bin/python/samba/provision/__init__.py #2282: Setting up the privileges database
INFO 2019-01-20 06:35:19,670 pid:1058523 bin/python/samba/provision/__init__.py #2285: Setting up idmap db
INFO 2019-01-20 06:35:19,674 pid:1058523 bin/python/samba/provision/__init__.py #2292: Setting up SAM db
INFO 2019-01-20 06:35:19,675 pid:1058523 bin/python/samba/provision/__init__.py #882: Setting up sam.ldb partitions and settings
INFO 2019-01-20 06:35:19,676 pid:1058523 bin/python/samba/provision/__init__.py #894: Setting up sam.ldb rootDSE
INFO 2019-01-20 06:35:19,677 pid:1058523 bin/python/samba/provision/__init__.py #1297: Pre-loading the Samba 4 and AD schema
INFO 2019-01-20 06:35:19,688 pid:1058523 bin/python/samba/provision/__init__.py #2342: A Kerberos configuration suitable for Samba AD has been generated at /memdisk/autobuild/fl/b264194/samba-py2/bin/ab/tmp/tmpjT_mmC/targetdir/private/krb5.conf
INFO 2019-01-20 06:35:19,688 pid:1058523 bin/python/samba/provision/__init__.py #2343: Merge the contents of this file with your system krb5.conf or replace it with this one. Do not create a symlink!
ERROR(ldb): uncaught exception - Deleted target CN=NTDS Settings\0ADEL:3859720a-a980-4a49-81ac-2a4492e17493,CN=RIDALLOCTEST1\0ADEL:70e4a40b-4909-4f91-b453-bc149215b941,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=samba,DC=example,DC=com GUID 3859720a-a980-4a49-81ac-2a4492e17493 linked from CN=bad5015b-1bb0-4325-a63f-1d7b8b1d80c8,CN=Partitions,CN=Configuration,DC=samba,DC=example,DC=com

  File "bin/python/samba/netcmd/__init__.py", line 184, in _run
    return self.run(*args, **kwargs)
  File "bin/python/samba/netcmd/domain.py", line 699, in run
    backend_store=backend_store)
  File "bin/python/samba/join.py", line 1535, in join_DC
    ctx.do_join()
  File "bin/python/samba/join.py", line 1429, in do_join
    ctx.join_replicate()
  File "bin/python/samba/join.py", line 1020, in join_replicate
    ctx.local_samdb.transaction_commit()
]:

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
samba.tests.emulate.traffic_packet.python2(ad_dc_ntvfs) -> 102
samba.tests.samba_tool.user.python2(ad_dc_ntvfs:local) -> 64
samba4.ldap.passwordsettings.python.python2(ad_dc_ntvfs) -> 45
samba.tests.samba_tool.user_wdigest.python2(ad_dc_ntvfs:local) -> 38
samba.tests.samba_tool.rodc.python2(rodc:local) -> 35
samba.tests.samba_tool.gpo.python2(ad_dc_ntvfs:local) -> 25
samba.tests.samba_tool.passwordsettings.python2(ad_dc_ntvfs:local) -> 25
samba.tests.blackbox.traffic_replay.python2(ad_dc_ntvfs) -> 24
samba.tests.samba_tool.group.python2(ad_dc_ntvfs:local) -> 22
samba.tests.samba_tool.ou.python2(ad_dc_ntvfs:local) -> 18
ERROR: test failed with exit code 1