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From Mahadev Konar <maha...@yahoo-inc.com>
Subject Re: A question about Watcher
Date Mon, 16 Aug 2010 16:39:31 GMT
Hi Qian,
 The watcher information is saved at the client, and the client will
reattach the watches to the new server it connects to.
  Hope that helps.

Thanks
mahadev


On 8/16/10 9:28 AM, "Qian Ye" <yeqian.zju@gmail.com> wrote:

> thx for explaination. Since the watcher can be preserved when the client
> switch the zookeeper server it connects to, does that means all the watchers
> information will be saved on all the zookeeper servers? I didn't find any
> source of the client can hold the watchers information.
> 
> 
> On Tue, Aug 17, 2010 at 12:21 AM, Ted Dunning <ted.dunning@gmail.com> wrote:
> 
>> I should correct this.  The watchers will deliver a session expiration
>> event, but since the connection is closed at that point no further
>> events will be delivered and the cluster will remove them.  This is as good
>> as the watchers disappearing.
>> 
>> On Mon, Aug 16, 2010 at 9:20 AM, Ted Dunning <ted.dunning@gmail.com>
>> wrote:
>> 
>>> The other is session expiration.  Watchers do not survive this.  This
>>> happens when a client does not provide timely
>>> evidence that it is alive and is marked as having disappeared by the
>>> cluster.
>>> 
>> 
> 
> 
> 
> --
> With Regards!
> 
> Ye, Qian
> 


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