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-144/2019-04-23-1835/flakey.log

The failure seems to be in the "ctdb" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-23-1835/ctdb.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-23-1835/ctdb.stdout
  
The top commit at the time of the failure was:

commit e24e344d0da58013fd5fa404529fe1d25ef403bf
Author: Lutz Justen <ljusten at google.com>
Date:   Fri Apr 19 11:17:58 2019 -0700

    waf: install: Remove installation of PIDL and manpages.
    
    It's not used outside of Samba other than wireshark
    who have their own vendor fork.
    
    Signed-off-by: Lutz Justen <ljusten at google.com>
    Signed-off-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Tue Apr 23 02:08:56 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

 PASSED  tests/tool/ctdb.setdbsticky.002.sh
 PASSED  tests/tool/ctdb.setdbsticky.003.sh
 PASSED  tests/tool/ctdb.setdbsticky.004.sh
 PASSED  tests/tool/ctdb.setdbsticky.005.sh
 PASSED  tests/tool/ctdb.setdebug.001.sh
 PASSED  tests/tool/ctdb.setdebug.002.sh
 PASSED  tests/tool/ctdb.setdebug.003.sh
 PASSED  tests/tool/ctdb.setifacelink.001.sh
 PASSED  tests/tool/ctdb.setifacelink.002.sh
 PASSED  tests/tool/ctdb.setvar.001.sh
 PASSED  tests/tool/ctdb.setvar.002.sh
 PASSED  tests/tool/ctdb.status.001.sh
 PASSED  tests/tool/ctdb.status.002.sh
 PASSED  tests/tool/ctdb.stop.001.sh
 PASSED  tests/tool/ctdb.stop.002.sh
 PASSED  tests/tool/ctdb.stop.003.sh
 PASSED  tests/tool/ctdb.unban.001.sh
 PASSED  tests/tool/ctdb.unban.002.sh
 PASSED  tests/tool/ctdb.unban.003.sh
 PASSED  tests/tool/ctdb.uptime.001.sh
 PASSED  tests/tool/ctdb.writekey.001.sh
 PASSED  tests/simple/00_ctdb_onnode.sh
 PASSED  tests/simple/01_ctdb_reclock_command.sh
 PASSED  tests/simple/02_ctdb_tunables.sh
 PASSED  tests/simple/05_ctdb_listnodes.sh
 PASSED  tests/simple/06_ctdb_getpid.sh
 PASSED  tests/simple/07_ctdb_process_exists.sh
 PASSED  tests/simple/08_ctdb_isnotrecmaster.sh
 PASSED  tests/simple/09_ctdb_ping.sh
 PASSED  tests/simple/11_ctdb_ip.sh
 PASSED  tests/simple/12_ctdb_getdebug.sh
 PASSED  tests/simple/13_ctdb_setdebug.sh
 PASSED  tests/simple/14_ctdb_statistics.sh
 PASSED  tests/simple/15_ctdb_statisticsreset.sh
 PASSED  tests/simple/16_ctdb_config_add_ip.sh
 PASSED  tests/simple/17_ctdb_config_delete_ip.sh
 PASSED  tests/simple/18_ctdb_reloadips.sh
 PASSED  tests/simple/19_ip_takeover_noop.sh
 PASSED  tests/simple/20_delip_iface_gc.sh
 PASSED  tests/simple/21_ctdb_attach.sh
 PASSED  tests/simple/23_ctdb_moveip.sh
 PASSED  tests/simple/24_ctdb_getdbmap.sh
 PASSED  tests/simple/25_dumpmemory.sh
 PASSED  tests/simple/26_ctdb_config_check_error_on_unreachable_ctdb.sh
*FAILED* tests/simple/27_ctdb_detach.sh

504/505 tests passed

Removing TEST_VAR_DIR=tests/var
autotest exited with exit status 1