Does not look like this question made to a forum.
Resending it in hope that somebody from ZK developers will answer.

Thanks.



________________________________
 From: yuliya Feldman <[email protected]>
To: "[email protected]" <[email protected]> 
Sent: Thursday, January 5, 2012 2:30 PM
Subject: Question regarding ZK behaviour during leader reelection
 
Hello here,

I have a question regarding ZK clients behaviour during ZK Leader reelection.

We have a situation where server where ZK Leader was running run low on memory 
and essentially ZK was "frozen" for quite a bit of time.

Meanwhile other 2 ZK servers did reelections among them and new Leader was 
chosen.

Now on ZK client nodes (not taking "bad" node into consideration) got 
Disconnect and Closely after Connect events, because as far as I understand no 
leader was available for about 500 ms. (during reelection).

The question really is - as it is very likely that it will be some time during 
ZK leader election when none of the ZK servers will be available ZK clients are 
very likely to "feel" that something happened on the ZK Server (Quorum side).
Which means that ANY application that relies on Zookeeper has to at least 
handle Disconnect event gracefully.

Are my assumptions correct?

Thanks.

Reply via email to