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-144/2019-04-05-0044/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-144/2019-04-05-0044/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-05-0044/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 00874b614449b094300a4e249ead22618031b1d8
Author: Gary Lockyer <gary at catalyst.net.nz>
Date:   Mon Apr 1 16:49:38 2019 +1300

    python join: Set index transaction cache size.
    
    The default value is too small for joining a large domain.  So we specify a
    size of 200,000 which is suitable for domains with up to 100,000 users.
    
    At a later date this could be added as a parameter to the join, but
    200,000 should be suitable for now.
    
    Signed-off-by: Gary Lockyer <gary at catalyst.net.nz>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Thu Apr  4 07:45:03 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[157(857)/588 at 7m54s] samba3.base.rename(nt4_dc)
[158(858)/588 at 7m54s] samba3.base.rw1(nt4_dc)
[159(859)/588 at 7m54s] samba3.base.rw1(nt4_dc)
[160(860)/588 at 7m55s] samba3.base.rw1(nt4_dc)
[161(861)/588 at 7m55s] samba3.base.secleak(nt4_dc)
[162(862)/588 at 7m56s] samba3.base.tcon(nt4_dc)
[163(863)/588 at 7m56s] samba3.base.tcondev(nt4_dc)
[164(864)/588 at 7m57s] samba3.base.trans2(nt4_dc)
[165(865)/588 at 8m0s] samba3.base.unlink(nt4_dc)
[166(866)/588 at 8m0s] samba3.base.vuid(nt4_dc)
[167(867)/588 at 8m1s] samba3.base.xcopy(nt4_dc)
[168(868)/588 at 8m1s] samba3.base.samba3error(nt4_dc)
[169(869)/588 at 8m1s] samba3.raw.acls(nt4_dc)
[170(881)/588 at 8m5s] samba3.raw.acls nfs4acl_xattr-simple-40(nt4_dc)
[171(893)/588 at 8m9s] samba3.raw.acls nfs4acl_xattr-special-40(nt4_dc)
[172(905)/588 at 8m12s] samba3.raw.acls nfs4acl_xattr-simple-41(nt4_dc)
[173(917)/588 at 8m14s] samba3.raw.acls nfs4acl_xattr-xdr-40(nt4_dc)
[174(929)/588 at 8m17s] samba3.raw.acls nfs4acl_xattr-xdr-41(nt4_dc)
[175(941)/588 at 8m20s] samba3.raw.acls nfs4acl_xattr-nfs-40(nt4_dc)
[176(953)/588 at 8m23s] samba3.raw.acls nfs4acl_xattr-nfs-41(nt4_dc)
[177(965)/588 at 8m26s] samba3.raw.chkpath(nt4_dc)
[178(966)/588 at 8m27s] samba3.raw.close(nt4_dc)
[179(967)/588 at 8m27s] samba3.raw.composite(nt4_dc)
[180(971)/588 at 8m29s] samba3.raw.eas(nt4_dc)
[181(972)/588 at 8m30s] samba3.raw.lock(nt4_dc)
[182(985)/588 at 9m4s] samba3.raw.mkdir(nt4_dc)
[183(986)/588 at 9m4s] samba3.raw.mux(nt4_dc)
[184(987)/588 at 9m7s] samba3.raw.notify(nt4_dc)
TESTING CHANGE NOTIFY COMPLETION FILTERS
Testing mkdir
Testing create file
UNEXPECTED(failure): samba3.raw.notify.mask(nt4_dc)
REASON: Exception: Exception: ../../source4/torture/raw/notify.c:846: notify.nttrans.out.changes[0].action was 2 (0x2), expected 1 (0x1): nchanges=1 action=2 expectedAction=1 filter=0x00000002

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) -> 55
samba3.base.dir2(nt4_dc) -> 53
samba3.raw.lock(nt4_dc) -> 34
samba3.blackbox.net.local.conf(nt4_dc:local) -> 32
samba3.smbtorture_s3.crypt_client.OPLOCK1(nt4_dc) -> 31
samba3.base.lock(nt4_dc) -> 23
samba3.base.defer_open(nt4_dc) -> 17
samba3.smbtorture_s3.crypt_client.LOCK1(nt4_dc) -> 13
samba3.smbtorture_s3.crypt_client.OPLOCK2(nt4_dc) -> 10
samba3.libwbclient_threads(nt4_member) -> 10
ERROR: test failed with exit code 1