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-144/2018-09-21-1847/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-144/2018-09-21-1847/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-09-21-1847/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit b6efa1507c38d316e8cf05025b47a555ca0d0d0a
Author: Amitay Isaacs <amitay at gmail.com>
Date:   Wed Sep 19 18:31:34 2018 +1000

    heimdal-build: Avoid using python str.format()
    
    In python 2.6, the format fields need to be numbered explicitly.  This
    causes the build to fail on RHEL6/Centos6 with following error:
    
     File "/home/amitay/samba.git/source4/heimdal_build/wscript_build", line 87, in HEIMDAL_ASN1
        os.path.join(bld.path.abspath(), option_file)))
    ValueError: zero length field name in format
    
    To use str.format() in HEIMDAL_ASN1(),
    
       "--option-file='{}'"  needs to be   "--options-file='{0}'"
    
    Or this fix which avoids str.format() completely.
    
    Signed-off-by: Amitay Isaacs <amitay at gmail.com>
    Reviewed-by: Martin Schwenke <martin at meltin.net>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Fri Sep 21 03:06:44 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[146(831)/571 at 7m25s] samba3.base.openattr(nt4_dc)
[147(832)/571 at 7m26s] samba3.base.properties(nt4_dc)
[148(833)/571 at 7m26s] samba3.base.rename(nt4_dc)
[149(834)/571 at 7m26s] samba3.base.rw1(nt4_dc)
[150(835)/571 at 7m27s] samba3.base.rw1(nt4_dc)
[151(836)/571 at 7m27s] samba3.base.rw1(nt4_dc)
[152(837)/571 at 7m27s] samba3.base.secleak(nt4_dc)
[153(838)/571 at 7m28s] samba3.base.tcon(nt4_dc)
[154(839)/571 at 7m28s] samba3.base.tcondev(nt4_dc)
[155(840)/571 at 7m28s] samba3.base.trans2(nt4_dc)
[156(841)/571 at 7m32s] samba3.base.unlink(nt4_dc)
[157(842)/571 at 7m32s] samba3.base.vuid(nt4_dc)
[158(843)/571 at 7m32s] samba3.base.xcopy(nt4_dc)
[159(844)/571 at 7m33s] samba3.base.samba3error(nt4_dc)
[160(845)/571 at 7m33s] samba3.raw.acls(nt4_dc)
[161(857)/571 at 7m35s] samba3.raw.acls nfs4acl_xattr-simple-40(nt4_dc)
[162(869)/571 at 7m38s] samba3.raw.acls nfs4acl_xattr-special-40(nt4_dc)
[163(881)/571 at 7m40s] samba3.raw.acls nfs4acl_xattr-simple-41(nt4_dc)
[164(893)/571 at 7m42s] samba3.raw.acls nfs4acl_xattr-xdr-40(nt4_dc)
[165(905)/571 at 7m45s] samba3.raw.acls nfs4acl_xattr-xdr-41(nt4_dc)
[166(917)/571 at 7m47s] samba3.raw.chkpath(nt4_dc)
[167(918)/571 at 7m47s] samba3.raw.close(nt4_dc)
[168(919)/571 at 7m47s] samba3.raw.composite(nt4_dc)
[169(923)/571 at 7m49s] samba3.raw.eas(nt4_dc)
[170(924)/571 at 7m49s] samba3.raw.lock(nt4_dc)
[171(937)/571 at 8m22s] samba3.raw.mkdir(nt4_dc)
[172(938)/571 at 8m23s] samba3.raw.mux(nt4_dc)
[173(939)/571 at 8m25s] 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) -> 43
samba3.base.dir2(nt4_dc) -> 36
samba3.raw.lock(nt4_dc) -> 33
samba3.blackbox.net.local.conf(nt4_dc:local) -> 32
samba3.smbtorture_s3.crypt_client(nt4_dc).OPLOCK1(nt4_dc) -> 31
samba3.base.lock(nt4_dc) -> 23
samba3.base.defer_open(nt4_dc) -> 17
samba3.smbtorture_s3.crypt_client(nt4_dc).LOCK1(nt4_dc) -> 12
samba3.smbtorture_s3.crypt_client(nt4_dc).IOCTL(nt4_dc) -> 11
samba3.smbtorture_s3.crypt_client(nt4_dc).OPLOCK2(nt4_dc) -> 10
ERROR: test failed with exit code 1