autobuild[sn-devel-184]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-184) 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-184/2019-03-29-1034/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-184/2019-03-29-1034/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-03-29-1034/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit 11f2583420310e0278188935f31be3131eb85fd4
Author: Stefan Metzmacher <metze at samba.org>
Date:   Wed Jan 16 21:29:51 2019 +0100

    s3:smbd: fix max_buffer handling of initial notify requests
    
    The max_buffer value is only evaluated on the first notify
    request on a directory handle.
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13864
    
    Signed-off-by: Stefan Metzmacher <metze at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Fri Mar 29 00:35:39 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[192(1095)/588 at 22m0s] samba3.raw.seek(nt4_dc)
[193(1096)/588 at 22m1s] samba3.raw.sfileinfo.bug(nt4_dc)
[194(1096)/588 at 22m1s] samba3.raw.streams(nt4_dc)
[195(1109)/588 at 22m7s] samba3.raw.unlink(nt4_dc)
[196(1112)/588 at 22m8s] samba3.raw.write(nt4_dc)
[197(1116)/588 at 22m9s] samba3.raw.samba3hide(nt4_dc)
[198(1117)/588 at 22m10s] samba3.raw.samba3badpath(nt4_dc)
[199(1118)/588 at 22m10s] samba3.raw.sfileinfo.rename(nt4_dc)
[200(1119)/588 at 22m11s] samba3.raw.session plain(nt4_dc)
[201(1121)/588 at 22m12s] samba3.raw.session enc(nt4_dc)
[202(1123)/588 at 22m12s] samba3.raw.samba3caseinsensitive(nt4_dc)
[203(1124)/588 at 22m13s] samba3.raw.samba3posixtimedlock(nt4_dc)
[204(1125)/588 at 22m18s] samba3.raw.samba3rootdirfid(nt4_dc)
[205(1126)/588 at 22m19s] samba3.raw.sfileinfo.end-of-file(nt4_dc)
[206(1127)/588 at 22m20s] samba3.raw.samba3checkfsp(nt4_dc)
[207(1128)/588 at 22m20s] samba3.raw.samba3closeerr(nt4_dc)
[208(1129)/588 at 22m21s] samba3.raw.samba3oplocklogoff(nt4_dc)
[209(1130)/588 at 22m21s] samba3.raw.samba3badnameblob(nt4_dc)
[210(1131)/588 at 22m21s] samba3.smb2.getinfo(nt4_dc)
[211(1137)/588 at 22m23s] samba3.smb2.lock aio(nt4_dc)
[212(1158)/588 at 22m27s] samba3.smb2.lock(nt4_dc)
[213(1179)/588 at 22m32s] samba3.smb2.read(nt4_dc)
[214(1183)/588 at 22m33s] samba3.smb2.aio_delay(nt4_dc)
[215(1184)/588 at 22m37s] samba3.smb2.create(nt4_dc)
[216(1197)/588 at 22m40s] samba3.smb2.twrp(nt4_dc)
[217(1197)/588 at 22m40s] samba3.smb2.acls(nt4_dc)
[218(1210)/588 at 22m47s] samba3.smb2.notify(nt4_dc)
smbtorture 4.11.0pre1-DEVELOPERBUILD
Using seed 1553855586
TESTING VALIDITY OF CHANGE NOTIFY REQUEST
UNEXPECTED(failure): samba3.smb2.notify.valid-req(nt4_dc)
REASON: Exception: Exception: (../../source4/torture/smb2/notify.c:163) wrong value for n.out.num_changes  0x2 should be 0x3

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) -> 123
samba3.raw.notify(nt4_dc) -> 111
samba3.raw.search(nt4_dc) -> 82
samba3.blackbox.net.local.conf(nt4_dc:local) -> 75
samba3.base.dir2(nt4_dc) -> 52
samba3.raw.oplock(nt4_dc) -> 50
samba3.raw.lock(nt4_dc) -> 35
samba3.smbtorture_s3.crypt_client.OPLOCK1(nt4_dc) -> 30
samba3.blackbox.smbclient_s3.NT1.crypt (nt4_dc)(nt4_dc) -> 28
samba3.raw.search(nt4_dc) -> 28
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed