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-144/2018-11-29-0011/flakey.log

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

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-29-0011/tdb.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-11-29-0011/tdb.stdout
  
The top commit at the time of the failure was:

commit 3be9ffe44565bc58fa7733fcd1b86952d9f7b138
Author: Volker Lendecke <vl at samba.org>
Date:   Wed Nov 21 14:55:10 2018 +0100

    krb5_wrap: Fix a typo
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Wed Nov 28 21:15:31 CET 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

'build' finished successfully (0.379s)
shell test: BINDIR=bin test/test_tdbbackup.sh test/jenkins-be-hash.tdb
time: 2018-11-28 23:11:04.621271Z
test: bin/tdbbackup
time: 2018-11-28 23:11:04.666226Z
success: normal tdbbackup on tdb file
time: 2018-11-28 23:11:04.736293Z
test: cmp
time: 2018-11-28 23:11:04.764385Z
success: cmp between tdbdumps of original and backup
time: 2018-11-28 23:11:04.796531Z
test: bin/tdbbackup
time: 2018-11-28 23:11:04.848016Z
success: readonly tdbbackup on tdb file
time: 2018-11-28 23:11:04.891590Z
test: cmp
time: 2018-11-28 23:11:04.928325Z
success: cmp between tdbdumps of original and back dbs
...tdb1-run-3G-file
...tdb1-run-bad-tdb-header
...tdb1-run
...tdb1-run-check
...tdb1-run-corrupt
...tdb1-run-die-during-transaction
...tdb1-run-endian
...tdb1-run-incompatible
...tdb1-run-nested-transactions
...tdb1-run-nested-traverse
...tdb1-run-no-lock-during-traverse
...tdb1-run-oldhash
...tdb1-run-open-during-transaction
...tdb1-run-readonly-check
...tdb1-run-rescue
...tdb1-run-rescue-find_entry
...tdb1-run-rdlock-upgrade
...tdb1-run-rwlock-check
...tdb1-run-summary
...tdb1-run-transaction-expand
...tdb1-run-traverse-in-transaction
...tdb1-run-wronghash-fail
...tdb1-run-zero-append
...tdb1-run-fcntl-deadlock
...tdb1-run-marklock-deadlock
...tdb1-run-allrecord-traverse-deadlock
tdb1-run-allrecord-traverse-deadlock failed:
........................marklock-deadlock-fcntl.tdb tests done
.................do_allrecord_lock: traverse should fail
......ret should succeed
.Running Python test with /usr/bin/python: python/tests/simple.py
python testsuite returned 0