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-144/2018-04-04-1232/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-144/2018-04-04-1232/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-04-04-1232/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit b8f7f42565d35e20ba576db101bd5eb27f90e903
Author: Swen Schillig <swen at vnet.ibm.com>
Date:   Tue Mar 13 09:22:45 2018 +0100

    ctdb: Remove double sanity checks from ctdb_tcp_read_cb
    
    Within ctdb_tcp_read_cb the provided data is checked for sanity,
    e.g. correct size and content. This is not required because it was
    done already by the caller(queue_process).
    
    Signed-off-by: Swen Schillig <swen at vnet.ibm.com>
    Reviewed-by: Martin Schwenke <martin at meltin.net>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Wed Apr  4 09:31:04 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[146(780)/499 at 12m1s] samba3.base.rw1(nt4_dc)
[147(781)/499 at 12m2s] samba3.base.rw1(nt4_dc)
[148(782)/499 at 12m2s] samba3.base.secleak(nt4_dc)
[149(783)/499 at 12m3s] samba3.base.tcon(nt4_dc)
[150(784)/499 at 12m3s] samba3.base.tcondev(nt4_dc)
[151(785)/499 at 12m4s] samba3.base.trans2(nt4_dc)
[152(786)/499 at 12m7s] samba3.base.unlink(nt4_dc)
[153(787)/499 at 12m8s] samba3.base.vuid(nt4_dc)
[154(788)/499 at 12m8s] samba3.base.xcopy(nt4_dc)
[155(789)/499 at 12m9s] samba3.base.samba3error(nt4_dc)
[156(790)/499 at 12m9s] samba3.raw.acls(nt4_dc)
[157(802)/499 at 12m11s] samba3.raw.acls nfs4acl_xattr-simple-40(nt4_dc)
[158(814)/499 at 12m14s] samba3.raw.acls nfs4acl_xattr-special-40(nt4_dc)
[159(826)/499 at 12m18s] samba3.raw.acls nfs4acl_xattr-simple-41(nt4_dc)
[160(838)/499 at 12m19s] samba3.raw.acls nfs4acl_xattr-xdr-40(nt4_dc)
[161(850)/499 at 12m21s] samba3.raw.acls nfs4acl_xattr-xdr-41(nt4_dc)
[162(862)/499 at 12m23s] samba3.raw.chkpath(nt4_dc)
[163(863)/499 at 12m24s] samba3.raw.close(nt4_dc)
[164(864)/499 at 12m24s] samba3.raw.composite(nt4_dc)
[165(868)/499 at 12m25s] samba3.raw.eas(nt4_dc)
[166(869)/499 at 12m26s] samba3.raw.lock(nt4_dc)
[167(882)/499 at 13m0s] samba3.raw.mkdir(nt4_dc)
[168(883)/499 at 13m0s] samba3.raw.mux(nt4_dc)
[169(884)/499 at 13m3s] samba3.raw.notify(nt4_dc)
TESTING CHANGE NOTIFY ON DIRECTORIES
Testing notify cancel
Testing notify mkdir
Testing notify rmdir
Testing notify mkdir - rmdir - mkdir - rmdir
Testing buffered notify on create of 10 files
Testing notify on unlink for the first file
UNEXPECTED(failure): samba3.raw.notify.dir(nt4_dc)
REASON: Exception: Exception: ../source4/torture/raw/notify.c:218: notify.nttrans.out.num_changes was 9 (0x9), expected 10 (0xA): wrong number of changes

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) -> 103
samba3.blackbox.net.local.conf(nt4_dc:local) -> 91
samba3.raw.lock(nt4_dc) -> 33
samba3.smbtorture_s3.crypt_client(nt4_dc).OPLOCK1(nt4_dc) -> 30
samba3.blackbox.net.rpc.registry(nt4_dc) -> 22
samba3.blackbox.smbclient_s3.SMB3.plain (nt4_member) member creds(nt4_member) -> 19
samba3.blackbox.smbclient_s3.NT1.crypt (nt4_dc)(nt4_dc) -> 19
samba3.blackbox.smbclient_s3.SMB3.crypt (nt4_dc)(nt4_dc) -> 19
samba3.blackbox.net.local.registry(nt4_dc:local) -> 19
samba3.blackbox.smbclient_s3.NT1.sign (nt4_dc)(nt4_dc) -> 19
ERROR: test failed with exit code 1