Gluster users - Jul 2016 - gluster with ctdb 251 banned|inactive

Hi
Why CTDB 251 is doing this when one node shutdown or go down randomly (and
sometimes it just works like charm),
;root at gnode1:~[root at gnode1 ~]# ctdb status
Number of nodes:2
pnn:0 10.0.72.5??????? BANNED|INACTIVE (THIS NODE)
pnn:1 10.0.72.6??????? DISCONNECTED|UNHEALTHY|INACTIVE
Generation:INVALID
Size:1
hash:0 lmaster:0
Recovery mode:RECOVERY (1)
Recovery master:0
I have to restart ctdb service to make it work back.
Any?comment is highly appreciated, thanks.
Leno
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