question Re: Zookeeper leader election in Support Questions

Zookeeper leader election

Big-dAta — Tue, 09 Aug 2022 18:27:06 GMT

if I have 5 zookeeper nodes and from that 5 zookeeper nodes one 1 zookeeper nodes goes down which was leader node then how zookeeper will elect the new leader from the remaining 4 zookeeper node?

Re: Zookeeper leader election

araujo — Tue, 09 Aug 2022 21:38:26 GMT

@Big-dAta ,

A quorum in a ZooKeeper ensemble is a group of servers with more than half of the total number of servers in the ensemble. So for an ensemble of 5 servers, the quorum is 3 servers.

As long as there are 3 servers available an election can always be carried out.

So, in your example, the 4 remaining servers will talk to each other and decide who will be the new leader.

Cheers,

André

Re: Zookeeper leader election

Big-dAta — Wed, 10 Aug 2022 04:39:52 GMT

Thank you mate, & what if 3 of my zookeeper are down? What I can do at that time

Re: Zookeeper leader election

araujo — Wed, 10 Aug 2022 08:25:41 GMT

Then the service will be unavailable until you recover at least one of them.