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-144/2016-02-09-2211/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2016-02-09-2211/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2016-02-09-2211/samba.stdout
  
The top commit at the time of the failure was:

commit b71c2e42308d23f08e1dd38c9a45ee8f25c65404
Author: Amitay Isaacs <amitay at gmail.com>
Date:   Tue Feb 2 15:58:37 2016 +1100

    Revert "ctdb-daemon: Check packet generation against database generation"
    
    This reverts commit 0ff90f4fac74e61192aff100b168e38ce0adfabb.
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=11707
    
    The checks against database generation are not required since
    the global generation is updated as part of updating vnnmap
    before the actual database recovery.  This change was done in
    5aab31a39a3589b910a78b96071d6aa5e6547696.
    
    Checking only against the database generation is incomplete.  It can
    cause CTDB to abort if the following sequence of events happen.
    
     - CTDB gets REQ_DMASTER packet (gen1)
       This packet processing gets deferred to get a record lock
    
     - CTDB goes into recovery, marks RECOVERY_ACTIVE
       CTDB recovery helper updates vnnmap (gen2)
    
     - CTDB processes REQ_DMASTER packet (gen1)
       The check against database generation (gen1) succeeds.
       The check for lmaster is now invalid because VNNMAP has changed.
       This will cause CTDB to abort due to protocol error.
    
    Reverting the patch stops processing packets of older generation before
    they get into call processing.
    
    Signed-off-by: Amitay Isaacs <amitay at gmail.com>
    Signed-off-by: Martin Schwenke <martin at meltin.net>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Tue Feb  9 12:39:24 CET 2016 on sn-devel-144