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:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-03-11-0533/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-03-11-0533/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-03-11-0533/samba.stdout
  
The top commit at the time of the failure was:

commit 9e954bcbf43d67a18ee55f84cda0b09028f96b92
Author: Martin Schwenke <martin at meltin.net>
Date:   Thu Mar 8 11:49:56 2018 +1100

    ctdb-tests: Don't use nc -d or -w options
    
    nmap-ncat is used in some distributions to replace netcat.  It has a
    different meaning for these options.
    
    We can get the same effect as the current combination of -d and -w by
    piping a sleep process to nc.  Subsequent use of $! works because it
    gets the last process in pipeline.
    
    Note that redirecting from /dev/null doesn't work with some versions
    of nc.  They just exit when they get EOF.
    
    Signed-off-by: Martin Schwenke <martin at meltin.net>
    Reviewed-by: Amitay Isaacs <amitay at gmail.com>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Fri Mar  9 12:24:13 CET 2018 on sn-devel-144