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-144/2018-11-19-0149/flakey.log

The failure seems to be in the "samba-purepy3-none-env" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-19-0149/samba-purepy3-none-env.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-19-0149/samba-purepy3-none-env.stdout
  
The top commit at the time of the failure was:

commit be46a42774590f68f8560d82f8425a43fecda98b
Author: Christof Schmitt <cs at samba.org>
Date:   Wed Nov 14 15:13:03 2018 -0700

    smbtorture: Close unused pipe fds in kernel_oplocks8
    
    This fixes a hang of the testcase when hitting an error in the child (e.g.
    localdir does not exist)
    
    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): Fri Nov 16 21:52:13 CET 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[182(3115)/217 at 34m34s] pidl.samba3-srv
[183(3116)/217 at 34m34s] pidl.tdr
[184(3122)/217 at 34m35s] pidl.test_util
[185(3128)/217 at 34m35s] pidl.typelist
[186(3184)/217 at 34m35s] pidl.util
[187(3256)/217 at 34m35s] pidl.wireshark-conf
[188(3305)/217 at 34m35s] pidl.wireshark-ndr
[189(3345)/217 at 34m35s] tdb.python
[190(3399)/217 at 34m35s] samba.tests.dsdb_lock
[191(3406)/217 at 35m46s] samba.tests.samba_tool.visualize
[192(3417)/217 at 35m48s] samba.tests.samba_tool.provision_password_check
[193(3421)/217 at 35m57s] samba.tests.samba_tool.help
[194(3422)/217 at 36m49s] samba.tests.domain_backup_offline
[195(3426)/217 at 38m16s] samba.tests.lsa_string
[196(3430)/217 at 38m17s] samba.tests.loadparm
[197(3433)/217 at 38m17s] samba4.blackbox.samba3dump
[198(3434)/217 at 38m17s] samba4.blackbox.upgrade
[199(3442)/217 at 38m43s] samba4.blackbox.provision.py
[200(3449)/217 at 39m30s] samba4.blackbox.supported_features
[201(3455)/217 at 39m38s] samba4.blackbox.start_backup
[202(3458)/217 at 39m47s] samba4.blackbox.upgradeprovision.current
[203(3465)/217 at 41m0s] samba4.blackbox.setpassword.py
[204(3471)/217 at 41m10s] samba4.blackbox.newuser.py
[205(3482)/217 at 41m22s] samba4.blackbox.group.py
[206(3511)/217 at 41m41s] samba4.blackbox.provision-backend
[207(3515)/217 at 41m49s] samba4.blackbox.renamedc.sh
[208(3526)/217 at 42m11s] samba4.dsdb.samdb.ldb_modules.unique_object_sids
[209(3532)/217 at 42m11s] samba4.dsdb.samdb.ldb_modules.encrypted_secrets.tdb
[210(3543)/217 at 42m12s] samba4.dsdb.samdb.ldb_modules.encrypted_secrets.mdb
[211(3554)/217 at 42m12s] lib.audit_logging.audit_logging
UNEXPECTED(failure): lib.audit_logging.audit_logging.test_audit_get_timestamp(none)
REASON: Exception: Exception: difftime(after, actual) >= 0
../lib/audit_logging/tests/audit_logging_test.c:827: error: Failure!

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
wafsamba.duplicate_symbols -> 822
samba.tests.docs -> 350
samba4.blackbox.upgradeprovision.alpha13 -> 139
samba4.blackbox.upgradeprovision.release-4-0-0 -> 130
samba4.blackbox.schemaupgrade -> 114
samba.tests.domain_backup_offline -> 87
samba4.blackbox.dbcheck.release-4-0-0 -> 84
samba4.blackbox.dbcheck.release-4-1-0rc3 -> 76
samba4.blackbox.upgradeprovision.current -> 74
samba.tests.dsdb_lock -> 70
ERROR: test failed with exit code 1