[Sheepdog] Node didn't show itself.

[TaoLin]

Hi, again.
 I was testing  sheepdog this morning,  and my sheepdog was at a time running as
this state:
root at node3:/home/sae# collie node list

  Idx - Host:Port          Vnodes       Zone

---------------------------------------------

     0 - 10.210.77.12:7000   	64  206426634

     1 - 10.210.77.13:7000   	64  223203850

     2 - 10.210.77.14:7000   	64  239981066
   
About half an hour past, I suddenly discovered that 10.210.77.12 had disappeared
when I tried to a new node which had a ip-address:10.210.77.11.
root at node3:/home/sae# collie node list

   Idx - Host:Port          Vnodes       Zone

---------------------------------------------

     0 - 10.210.77.13:7000   	64  223203850

     1 - 10.210.77.14:7000   	64  239981066


I then input this command at 10.210.77.12:

[root at novanode1 /home/sae]# collie node list

   Idx - Host:Port          Vnodes       Zone

---------------------------------------------

     0 - 10.210.77.13:7000   	64  223203850

     1 - 10.210.77.14:7000   	64  239981066


10.210.77.12 didn't show itself and 10.210.77.11 but it showed others, and it
also showed vdi:
[root at novanode1 /home/sae]# collie vdi list

  name        id    size    used  shared    creation time   vdi id

------------------------------------------------------------------

  ubuntu       1  5.0 GB  4.8 GB  0.0 MB 2011-11-27 22:38   d4a4d2





10.210.77.11 reported this:

root at novacontroler:/home/sae# collie node list
   Idx - Host:Port          Vnodes       Zone
---------------------------------------------
     0 - 10.210.77.12:7000   	64  206426634
     1 - 10.210.77.13:7000   	64  223203850
     2 - 10.210.77.14:7000   	64  239981066

It didn't show itself as well.



Is my corosync(1.2.0) too old to support sheepdog or something else went wrong?

PS:I have kept sheep's logs and I can send them to you if it is necessary.

Thanks a lot.