autobuild[sn-devel-184]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-184) 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-184/2019-06-28-1554/flakey.log

The failure seems to be in the "samba-ad-dc-2" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-06-28-1554/samba-ad-dc-2.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-06-28-1554/samba-ad-dc-2.stdout
  
The top commit at the time of the failure was:

commit fee8cf326bfe240d3a8720569eab43f474349aff
Author: Michael Adam <obnox at samba.org>
Date:   Thu Jun 20 15:14:57 2019 +0200

    vfs:glusterfs_fuse: treat ENOATTR as ENOENT
    
    The original implementation of the virtual xattr get_real_filename
    in gluster was misusing the ENOENT errno as the authoritative anwer
    that the file/dir that we were asking the real filename for does not
    exist. But since the getxattr call is done on the parent directory,
    this is a violation of the getxattr API which uses ENOENT for the
    case that the file/dir that the getxattr call is done against does
    not exist.
    
    Now after a recent regression for fuse-mount re-exports due to
    gluster mapping ENOENT to ESTALE in the fuse-bridge, the gluster
    implementation is changed to more correctly return ENOATTR if the
    requested file does not exist.
    
    This patch changes the glusterfs_fuse vfs module to treat ENOATTR as
    ENOENT to be fully functional again with latest gluster.
    
    - Without this patch, samba against a new gluster will work correctly,
      but the get_real_filename optimization for a non-existing entry
      is lost.
    
    - With this patch, Samba will not work correctly any more against
      very old gluster servers: Those (correctly) returned ENOATTR
      always, which Samba originally interpreted as EOPNOTSUPP, triggering
      the expensive directory scan. With this patch, ENOATTR is
      interpreted as ENOENT, the authoritative answer that the requested
      entry does not exist, which is wrong unless it really does not exist.
    
    Signed-off-by: Michael Adam <obnox at samba.org>
    Reviewed-by: Guenther Deschner <gd at samba.org>
    
    Autobuild-User(master): Günther Deschner <gd at samba.org>
    Autobuild-Date(master): Fri Jun 28 12:52:03 UTC 2019 on sn-devel-184

and the last 50 lines of the stdout log were:

badPwdCount = '3'
lockoutTime = '132062107907405560'
badPasswordTime = '132062107907405560'
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
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
badPwdCount = '3'
lockoutTime = '132062107907405560'
badPasswordTime = '132062107907405560'
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
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
badPwdCount = '3'
lockoutTime = '132062107907405560'
badPasswordTime = '132062107907405560'
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/b2864834/samba-ad-dc-2/source4/dsdb/tests/python/rodc_rwdc.py", line 305, in test_login_lockout_krb5
    self._test_login_lockout_rodc_rwdc(self.lockout1krb5_creds, userdn)
  File "/memdisk/autobuild/fl/b2864834/samba-ad-dc-2/source4/dsdb/tests/python/rodc_rwdc.py", line 556, in _test_login_lockout_rodc_rwdc
    self.fail()
AssertionError: None

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.large_ldap.gssapi.python(vampire_dc)(vampire_dc) -> 299
samba.wbinfo_sids2xids.(rodc:local)(rodc:local) -> 32
samba.tests.ntlm_auth(rodc:local) -> 15
samba.tests.dns(rodc:local) -> 8
samba.tests.py_credentials(vampire_dc) -> 6
samba4.ldap.rodc.python(rodc)(rodc) -> 6
samba.tests.dns(vampire_dc:local) -> 5
samba.tests.encrypted_secrets(vampire_dc:local) -> 3
samba.wbinfo_simple.user-info=$DOMAIN/$DC_USERNAME(rodc:local) -> 1
samba.wbinfo_simple.name-to-sid=$DC_USERNAME(rodc:local) -> 1
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed