[sheepdog] zookeeper driver join panic

[Liu Yuan]

On Fri, Jun 28, 2013 at 07:01:10PM +0800, Kai Zhang wrote:
> 
> On Jun 28, 2013, at 11:32 AM, Liu Yuan <namei.unix at gmail.com> wrote:
> 
> > Jun 27 22:11:22 [main] zk_create_seq_node(235) PANIC: failed, path:/sheepdog/master/, no children for ephemerals
> 
> 
> This error is caused when /sheepdog/master is an ephemerals node which should be happened only in old version.
> In the newest version, /sheepdog/master is a normal node.
> 
> So I guess this is because the first 3 started sheep are in old version and the 4th sheep is in new version.
> 
> @Yuan, could you ask the user to verify this?
> 

I guess so, I'll ask him later. But in this case, I think we should print a
error message and exit gracefully.

Thanks
Yuan