Thanks for your help all the time. Best Regargs, Heyuan Li
2012/5/20 Martin Kou <[email protected]>: > Correct. And even simple connection losses can cause watches to become > unreliable as well: > > http://zookeeper.apache.org/doc/trunk/releasenotes.html#Watch+Management > "One caveat to the watch management: it is possible to miss an event for > the creation and deletion of a znode if watching for creation and both the > create and delete happens while the client is disconnected from ZooKeeper." > > Best Regards, > Martin Kou > > On Fri, May 18, 2012 at 8:33 PM, 李赫元 <[email protected]> wrote: > >> Thanks for your help. >> That means we can't totally rely on watchs because it may loss event if >> session expired, right? >> >> 在 2012年5月19日星期六，Camille Fournier <[email protected]> 写道： >> > I'm not sure what you mean in question #1. A session expired event >> > generally causes the client to become completely invalid, you could >> > wrap the client in your own logic to record what you were watching, >> > but I don't think you can get that out of the client after it's >> > expired. >> > >> > 2. You won't be able to see events that happened when the session was >> > expired. The server has closed your connection and won't know to send >> > you events unless you have a valid session with a valid watch. >> > >> > 3. Reconnect won't work on expired sessions, you need to create an >> > entirely new session. Reconnect works when you get disconnected but >> > not expired. >> > >> > Hope that helps >> > On Fri, May 18, 2012 at 12:18 PM, 李赫元 <[email protected]> wrote: >> >> Hi, All >> >> >> >> I'm dealing with the case of "session expired" event. Please help me >> >> with the following question. >> >> >> >> 1. After receive "session expired" event, how to recover the watch >> >> that are setting before expired gracefully? >> >> >> >> >> >> 2.Currently, I record the watch setting and call the api to set it >> >> again after I got "expired event". It will callback for event after >> >> connection was success again. But what about the event happend between >> >> I success reinit the session to zk server. Currently, it got lost. Is >> >> there any way that I can got these events ? >> >> >> >> >> >> 3.I try to use reconnect, in zookeeper_init, but does't work. My guess >> >> is reconnect is only work for connection that are in state connect >> >> (Not valid after session timeout), is it right? >> >> >> >> >> >> Thanks for your help ! >> > >>
