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-144/2018-06-15-1851/flakey.log

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

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-06-15-1851/samba-ad-dc.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-06-15-1851/samba-ad-dc.stdout
  
The top commit at the time of the failure was:

commit f4f3abfa0e18bb4968b37b1cac40cd8c185c8d7b
Author: Andrew Bartlett <abartlet at samba.org>
Date:   Wed Jun 13 11:20:00 2018 +0200

    ldb_tdb: Use mem_ctx and so avoid leak onto long-term memory on duplicated add.
    
    After a duplicated add a small amount of memory can be leaked onto a
    long-term context.
    
    Found by Andrej Gessel https://github.com/andiges
    
    https://github.com/samba-team/samba/commit/e8fb45125e6a279b918694668e0d4fbddac10aee#commitcomment-29334102
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13471
    Signed-off-by: Andrew Bartlett <abartlet at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Fri Jun 15 04:39:41 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[148(778)/546 at 15m43s] samba3.rpc.samr.passwords.validate over ncacn_ip_tcp (ad_dc)
[149(779)/546 at 15m43s] samba3.rpc.netlogon.admin(ad_dc)
[150(788)/546 at 15m49s] samba3.rpc.schannel(ad_dc)
[151(789)/546 at 16m31s] samba3.rpc.schannel2(ad_dc)
[152(790)/546 at 16m34s] samba3.rpc.schannel_anon_setpw anonymous password set(ad_dc)
[153(791)/546 at 16m35s] samba3.rpc.join(ad_dc)
[154(792)/546 at 16m40s] samba3.rpc.bind(ad_dc)
[155(800)/546 at 16m46s] samba3.unix.info2(ad_dc)
[156(801)/546 at 16m46s] samba3.unix.whoami machine account(ad_member:local)
[157(802)/546 at 16m47s] samba3.unix.whoami(ad_dc)
[158(803)/546 at 16m48s] samba3.unix.whoami kerberos connection(ad_dc)
[159(804)/546 at 16m49s] samba3.unix.whoami anonymous connection(ad_dc)
[160(805)/546 at 16m50s] samba3.unix.whoami ntlm user at realm(ad_dc)
[161(806)/546 at 16m50s] samba3.unix.whoami(ad_member)
[162(807)/546 at 16m51s] samba3.unix.whoami kerberos connection(ad_member)
[163(808)/546 at 16m52s] samba3.unix.whoami anonymous connection(ad_member)
[164(809)/546 at 16m52s] samba3.unix.whoami ntlm user at realm(ad_member)
[165(810)/546 at 16m53s] samba3.local.nss(ad_member:local)
[166(815)/546 at 17m25s] samba3.local.nss(ad_dc:local)
[167(820)/546 at 20m5s] samba3.rap.basic(ad_dc)
[168(826)/546 at 20m8s] samba3.rap.rpc(ad_dc)
[169(827)/546 at 20m9s] samba3.rap.printing(ad_dc)
[170(838)/546 at 20m22s] samba3.rap.sam(ad_dc)
[171(843)/546 at 20m26s] samba3.nbt.dgram(ad_dc)
[172(846)/546 at 20m30s] samba3.libsmbclient(ad_dc)
mkdir failed on directory /m/autobuild/fl/b3788895/prefix/samba-ad-dc/var/cache: No such file or directory
mkdir failed on directory /m/autobuild/fl/b3788895/prefix/samba-ad-dc/var/cache: No such file or directory
mkdir failed on directory /m/autobuild/fl/b3788895/prefix/samba-ad-dc/var/cache: No such file or directory
mkdir failed on directory /m/autobuild/fl/b3788895/prefix/samba-ad-dc/var/cache: No such file or directory
mkdir failed on directory /m/autobuild/fl/b3788895/prefix/samba-ad-dc/var/cache: No such file or directory
mkdir failed on directory /m/autobuild/fl/b3788895/prefix/samba-ad-dc/var/cache: No such file or directory
UNEXPECTED(failure): samba3.libsmbclient.readdirplus(ad_dc)
REASON: Exception: Exception: ../source4/torture/libsmbclient/libsmbclient.c:262: failed to create file 'smb://Administrator:locDCpass1@addc/tmp/test_readdirplus.txt': Software caused connection abort

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
samba3.local.nss(ad_dc:local) -> 160
samba3.rpc.samr.passwords.pwdlastset(ad_dc) -> 57
samba3.raw.session krb5(ad_dc) -> 54
samba3.rpc.spoolss.printer(ad_dc) -> 52
samba3.rpc.schannel(ad_dc) -> 42
samba3.smb2.session krb5(ad_dc) -> 40
samba3.smb2.dir(ad_dc) -> 39
samba3.smb2.ioctl(ad_dc) -> 39
samba3.rpc.spoolss.driver(ad_dc) -> 38
samba3.rpc.spoolss.printserver(ad_dc) -> 37
ERROR: test failed with exit code 1