Your email is a little ambiguous.
a) "5 instances with 3 as quorum" could mean 5 instances configured and
running normally.
Or
b) it could mean 5 instances with 2 instances that are down.
In (a) restarting the leader instance *should* cause the cluster to do a
leader election again and form a new quorum. That is a form of losing
quorum. If that is what you mean, this is normal. A new quorum should be
formed and things should continue fairly soon.
In (b), restarting the leader will result in only 2 instances running which
is not enough to maintain quorum and until you have at least 3 nodes
running again, you can't proceed.
On Wed, Apr 9, 2014 at 11:03 AM, Bae, Jae Hyeon <metacret@gmail.com> wrote:
> Hi zookeeper users
>
> While rolling restart zookeeper cluster of 5 instances with 3 as quorum,
> restarting the leader instance made quorum lost. Is this expected?
> Otherwise, how can I restart the leader instance without interrupting whole
> cluster? Or is this fixed in 3.4.6?
>
> Thank you
> Best, Jae
>
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