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-144/2019-01-19-1241/flakey.log

The failure seems to be in the "samba-nt4" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-19-1241/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-01-19-1241/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 4b26ccff859048654c0680665acee53714997980
Author: Martin Krämer <mk.maddin at gmail.com>
Date:   Wed Jan 9 13:17:02 2019 +0000

    python: dsal: Fix possibility of identical ACE's being added.
    
    Currently it is possible to add the same ace multiple times if
    the case sensitivity does not match the existing one using "--sddl" parameter.
    As an example while an ace
    
    "OA;CIIO;RPWP;3e978925-8c01-11d0-afda-00c04fd930c9;bf967a86-0de6-11d0-a285-00aa003049e2;PS"
    
    already exists a sddl
    
    "OA;CIIO;RPWP;3E978925-8C01-11D0-AFDA-00C04FD930C9;BF967A86-0DE6-11D0-A285-00AA003049E2;PS"
    
    can be added without detection (and can be added multiple times). As an end result
    after a high number of addings (in my tests it was about 1600-1800 aces for one
    object) no further changes on that object are possible.
    
    Signed-off-by: Martin Krämer <mk.maddin at gmail.com>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Rowland Penny <rpenny at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Fri Jan 18 23:19:13 CET 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[147(832)/578 at 10m26s] samba3.base.open(nt4_dc)
[148(833)/578 at 10m27s] samba3.base.openattr(nt4_dc)
[149(834)/578 at 10m28s] samba3.base.properties(nt4_dc)
[150(835)/578 at 10m28s] samba3.base.rename(nt4_dc)
[151(836)/578 at 10m28s] samba3.base.rw1(nt4_dc)
[152(837)/578 at 10m29s] samba3.base.rw1(nt4_dc)
[153(838)/578 at 10m30s] samba3.base.rw1(nt4_dc)
[154(839)/578 at 10m30s] samba3.base.secleak(nt4_dc)
[155(840)/578 at 10m31s] samba3.base.tcon(nt4_dc)
[156(841)/578 at 10m31s] samba3.base.tcondev(nt4_dc)
[157(842)/578 at 10m31s] samba3.base.trans2(nt4_dc)
[158(843)/578 at 10m35s] samba3.base.unlink(nt4_dc)
[159(844)/578 at 10m35s] samba3.base.vuid(nt4_dc)
[160(845)/578 at 10m36s] samba3.base.xcopy(nt4_dc)
[161(846)/578 at 10m36s] samba3.base.samba3error(nt4_dc)
[162(847)/578 at 10m36s] samba3.raw.acls(nt4_dc)
[163(859)/578 at 10m40s] samba3.raw.acls nfs4acl_xattr-simple-40(nt4_dc)
[164(871)/578 at 10m44s] samba3.raw.acls nfs4acl_xattr-special-40(nt4_dc)
[165(883)/578 at 10m47s] samba3.raw.acls nfs4acl_xattr-simple-41(nt4_dc)
[166(895)/578 at 10m49s] samba3.raw.acls nfs4acl_xattr-xdr-40(nt4_dc)
[167(907)/578 at 10m53s] samba3.raw.acls nfs4acl_xattr-xdr-41(nt4_dc)
[168(919)/578 at 10m55s] samba3.raw.chkpath(nt4_dc)
[169(920)/578 at 10m56s] samba3.raw.close(nt4_dc)
[170(921)/578 at 10m56s] samba3.raw.composite(nt4_dc)
[171(925)/578 at 10m58s] samba3.raw.eas(nt4_dc)
[172(926)/578 at 10m59s] samba3.raw.lock(nt4_dc)
[173(939)/578 at 11m33s] samba3.raw.mkdir(nt4_dc)
[174(940)/578 at 11m34s] samba3.raw.mux(nt4_dc)
[175(941)/578 at 11m37s] samba3.raw.notify(nt4_dc)
TESTING CHANGE NOTIFY COMPLETION FILTERS
Testing mkdir
UNEXPECTED(failure): samba3.raw.notify.mask(nt4_dc)
REASON: Exception: Exception: ../../source4/torture/raw/notify.c:835: notify.nttrans.out.changes[0].action was 2 (0x2), expected 1 (0x1): nchanges=1 action=2 expectedAction=1 filter=0x00000004

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.blackbox.net.rpc.conf(nt4_dc) -> 75
samba3.base.dir2(nt4_dc) -> 50
samba3.blackbox.net.local.conf(nt4_dc:local) -> 49
samba3.raw.lock(nt4_dc) -> 34
samba3.smbtorture_s3.crypt_client.OPLOCK1(nt4_dc) -> 30
samba3.blackbox.smbclient_s3.SMB3.crypt (nt4_dc)(nt4_dc) -> 19
samba3.blackbox.smbclient_s3.SMB3.sign (nt4_dc)(nt4_dc) -> 18
samba3.blackbox.smbclient_s3.NT1.crypt (nt4_dc)(nt4_dc) -> 17
samba3.blackbox.smbclient_s3.SMB3.plain (nt4_member) member creds(nt4_member) -> 17
samba3.base.defer_open(nt4_dc) -> 16
ERROR: test failed with exit code 1