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-144/2018-05-27-1925/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-144/2018-05-27-1925/samba.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-05-27-1925/samba.stdout
  
The top commit at the time of the failure was:

commit 1531fcde8252efcb2f69dd5462beb83786bb1135
Author: Christof Schmitt <cs at samba.org>
Date:   Tue May 22 12:52:58 2018 -0700

    vfs_gpfs: Use full_path_tos instead of talloc_asprintf
    
    full_path_tos avoids the talloc call for most cases; use that instead of
    talloc_asprintf.
    
    Signed-off-by: Christof Schmitt <cs at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Sat May 26 01:43:09 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

Failed to connect to 'ldap://localdc' with backend 'ldap': LDAP error 49 LDAP_INVALID_CREDENTIALS -  <8009030C: LdapErr: DSID-0C0904DC, comment: AcceptSecurityContext error, data 52e, v1db1> <>
bin/samba-tool rodc preload cn=lockout1krb5,cn=users,DC=samba,DC=example,DC=com -UAdministrator%locDCpass1 --server localdc
Replicating DN CN=lockout1krb5,CN=Users,DC=samba,DC=example,DC=com
Exop on[CN=lockout1krb5,CN=Users,DC=samba,DC=example,DC=com] objects[1] linked_values[0]
Failed to get kerberos credentials (kerberos required): kinit for lockout1krb5 at SAMBADOMAIN failed (Preauthentication failed)

Wrong username or password: kinit for lockout1krb5 at SAMBADOMAIN failed (Preauthentication failed)

gensec_spnego_create_negTokenInit_step: gssapi_krb5: creating NEG_TOKEN_INIT for ldap/rodc failed (next[(null)]): NT_STATUS_LOGON_FAILURE
Failed to bind - LDAP client internal error: NT_STATUS_LOGON_FAILURE
Failed to connect to 'ldap://rodc' with backend 'ldap': LDAP client internal error: NT_STATUS_LOGON_FAILURE
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 lastlogontimestamp with wrong password 

badPwdCount = '1'
badPasswordTime = '131719153299201030'
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 LLTimestamp is updated to lastlogon 

badPwdCount = '1'
UNEXPECTED(failure): samba4.ldap.rodc_rwdc.python(rodc).__main__.RodcRwdcCachedTests.test_login_lockout_krb5(rodc:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b2239778/samba/source4/dsdb/tests/python/rodc_rwdc.py", line 300, in test_login_lockout_krb5
    self._test_login_lockout_rodc_rwdc(self.lockout1krb5_creds, userdn)
  File "/memdisk/autobuild/fl/b2239778/samba/source4/dsdb/tests/python/rodc_rwdc.py", line 447, in _test_login_lockout_rodc_rwdc
    msg='LLTimestamp is updated to lastlogon')
  File "/memdisk/autobuild/fl/b2239778/samba/source4/dsdb/tests/python/rodc_rwdc.py", line 148, in _check_account
    True)
  File "/memdisk/autobuild/fl/b2239778/samba/source4/dsdb/tests/python/password_lockout_base.py", line 133, in _check_account
    self._check_attribute(res, "badPwdCount", badPwdCount)
  File "/memdisk/autobuild/fl/b2239778/samba/source4/dsdb/tests/python/password_lockout_base.py", line 72, in _check_attribute
    self.assertTrue(v == value, msg)
AssertionError: attr[badPwdCount]=[1] != [0] on dn[CN=lockout1krb5,CN=Users,DC=samba,DC=example,DC=com

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) -> 690
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) -> 199
samba3.smbtorture_s3.vfs_aio_fork(simpleserver).RW2(simpleserver) -> 135
samba4.raw.notify(ad_dc_ntvfs) -> 107
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs)(ad_dc_ntvfs) -> 102
samba4.ldap.dirsync.python(ad_dc_ntvfs)(ad_dc_ntvfs) -> 92
samba4.rpc.samlogon on ncacn_np with (ad_dc_ntvfs) -> 74
samba.tests.emulate.traffic_packet(ad_dc_ntvfs) -> 71
samba.tests.samba_tool.user(ad_dc_ntvfs:local) -> 69
ERROR: test failed with exit code 1