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-144/2018-05-12-1234/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-144/2018-05-12-1234/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-05-12-1234/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit b9d01fddc651798a50c2a2bf0d596d5f9d7eb6a1
Author: Martin Schwenke <martin at meltin.net>
Date:   Tue Apr 24 14:13:35 2018 +1000

    ctdb-scripts: Drop CTDB_SUPPRESS_COREFILE and CTDB_MAX_OPEN_FILES options
    
    These should be done using features provided by the operating system.
    
    Signed-off-by: Martin Schwenke <martin at meltin.net>
    Reviewed-by: Amitay Isaacs <amitay at gmail.com>
    
    Autobuild-User(master): Amitay Isaacs <amitay at samba.org>
    Autobuild-Date(master): Sat May 12 09:13:28 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[140(784)/500 at 6m39s] samba3.base.ntdeny2(nt4_dc)
[141(785)/500 at 6m40s] samba3.base.open(nt4_dc)
[142(786)/500 at 6m41s] samba3.base.openattr(nt4_dc)
[143(787)/500 at 6m41s] samba3.base.properties(nt4_dc)
[144(788)/500 at 6m41s] samba3.base.rename(nt4_dc)
[145(789)/500 at 6m41s] samba3.base.rw1(nt4_dc)
[146(790)/500 at 6m42s] samba3.base.rw1(nt4_dc)
[147(791)/500 at 6m42s] samba3.base.rw1(nt4_dc)
[148(792)/500 at 6m42s] samba3.base.secleak(nt4_dc)
[149(793)/500 at 6m43s] samba3.base.tcon(nt4_dc)
[150(794)/500 at 6m43s] samba3.base.tcondev(nt4_dc)
[151(795)/500 at 6m44s] samba3.base.trans2(nt4_dc)
[152(796)/500 at 6m47s] samba3.base.unlink(nt4_dc)
[153(797)/500 at 6m47s] samba3.base.vuid(nt4_dc)
[154(798)/500 at 6m48s] samba3.base.xcopy(nt4_dc)
[155(799)/500 at 6m48s] samba3.base.samba3error(nt4_dc)
[156(800)/500 at 6m48s] samba3.raw.acls(nt4_dc)
[157(812)/500 at 6m50s] samba3.raw.acls nfs4acl_xattr-simple-40(nt4_dc)
[158(824)/500 at 6m52s] samba3.raw.acls nfs4acl_xattr-special-40(nt4_dc)
[159(836)/500 at 6m55s] samba3.raw.acls nfs4acl_xattr-simple-41(nt4_dc)
[160(848)/500 at 6m56s] samba3.raw.acls nfs4acl_xattr-xdr-40(nt4_dc)
[161(860)/500 at 6m57s] samba3.raw.acls nfs4acl_xattr-xdr-41(nt4_dc)
[162(872)/500 at 6m59s] samba3.raw.chkpath(nt4_dc)
[163(873)/500 at 6m59s] samba3.raw.close(nt4_dc)
[164(874)/500 at 6m59s] samba3.raw.composite(nt4_dc)
[165(878)/500 at 7m0s] samba3.raw.eas(nt4_dc)
[166(879)/500 at 7m1s] samba3.raw.lock(nt4_dc)
[167(892)/500 at 7m34s] samba3.raw.mkdir(nt4_dc)
[168(893)/500 at 7m34s] samba3.raw.mux(nt4_dc)
[169(894)/500 at 7m36s] samba3.raw.notify(nt4_dc)
TESTING CHANGE NOTIFY REPLY ALIGNMENT
UNEXPECTED(failure): samba3.raw.notify.alignment(nt4_dc)
REASON: Exception: Exception: ../source4/torture/raw/notify.c:1970: Expression `notify.nttrans.out.num_changes == num_names' failed:

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) -> 42
samba3.raw.lock(nt4_dc) -> 33
samba3.smbtorture_s3.crypt_client(nt4_dc).OPLOCK1(nt4_dc) -> 31
samba3.blackbox.net.local.conf(nt4_dc:local) -> 29
samba3.base.lock(nt4_dc) -> 25
samba3.base.dir2(nt4_dc) -> 17
samba3.smbtorture_s3.crypt_client(nt4_dc).LOCK1(nt4_dc) -> 17
samba3.base.defer_open(nt4_dc) -> 16
samba3.smbtorture_s3.crypt_client(nt4_dc).OPLOCK2(nt4_dc) -> 10
samba3.smbtorture_s3.crypt_client(nt4_dc).IOCTL(nt4_dc) -> 10
ERROR: test failed with exit code 1