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Posted to users@kafka.apache.org by Connie Yang <cy...@gmail.com> on 2014/05/13 15:52:10 UTC
What happens to Kafka when ZK lost its quorum?
Hi all,
Can Kafka producers, brokers and consumers still be processing messages and
functioning in their normal states if Zookeeper lost its quorum?
Thanks,
Connie
Re: What happens to Kafka when ZK lost its quorum?
Posted by Guozhang Wang <wa...@gmail.com>.
Hi Weide/Connie,
I have added this entry in the FAQ, please let me know if anything on the
wiki is not clear to you.
https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-HowareKafkabrokersdependonZookeeper
?
Guozhang
On Wed, May 14, 2014 at 8:15 AM, Neha Narkhede <ne...@gmail.com>wrote:
> Kafka requires a functional and healthy zookeeper setup. It is recommended
> that you closely monitor your zookeeper cluster and provision it so that it
> is performant.
>
> Thanks,
> Neha
>
>
> On Tue, May 13, 2014 at 6:52 AM, Connie Yang <cy...@gmail.com>
> wrote:
>
> > Hi all,
> >
> > Can Kafka producers, brokers and consumers still be processing messages
> and
> > functioning in their normal states if Zookeeper lost its quorum?
> >
> > Thanks,
> > Connie
> >
>
--
-- Guozhang
Re: What happens to Kafka when ZK lost its quorum?
Posted by Neha Narkhede <ne...@gmail.com>.
Kafka requires a functional and healthy zookeeper setup. It is recommended
that you closely monitor your zookeeper cluster and provision it so that it
is performant.
Thanks,
Neha
On Tue, May 13, 2014 at 6:52 AM, Connie Yang <cy...@gmail.com> wrote:
> Hi all,
>
> Can Kafka producers, brokers and consumers still be processing messages and
> functioning in their normal states if Zookeeper lost its quorum?
>
> Thanks,
> Connie
>
Re: What happens to Kafka when ZK lost its quorum?
Posted by Weide Zhang <we...@gmail.com>.
Hi Guozhang,
In worst case zookeeper dies for say 1 hour and come back up, will things
still be recovered automatically after 1 hour ?
Weide
On Wed, May 14, 2014 at 8:28 AM, Guozhang Wang <wa...@gmail.com> wrote:
> In 0.8, the servers and consumers are heavily dependent on ZK to function.
> With ZK down, the servers cannot manage replicas and consumers cannot
> assign partitions within the group.
>
> In 0.9 we are going to remove the ZK dependency from consumer clients, but
> Kafka servers would still be dependent on ZK.
>
> Guozhang
>
>
> On Tue, May 13, 2014 at 6:52 AM, Connie Yang <cy...@gmail.com>
> wrote:
>
> > Hi all,
> >
> > Can Kafka producers, brokers and consumers still be processing messages
> and
> > functioning in their normal states if Zookeeper lost its quorum?
> >
> > Thanks,
> > Connie
> >
>
>
>
> --
> -- Guozhang
>
Re: What happens to Kafka when ZK lost its quorum?
Posted by Guozhang Wang <wa...@gmail.com>.
In 0.8, the servers and consumers are heavily dependent on ZK to function.
With ZK down, the servers cannot manage replicas and consumers cannot
assign partitions within the group.
In 0.9 we are going to remove the ZK dependency from consumer clients, but
Kafka servers would still be dependent on ZK.
Guozhang
On Tue, May 13, 2014 at 6:52 AM, Connie Yang <cy...@gmail.com> wrote:
> Hi all,
>
> Can Kafka producers, brokers and consumers still be processing messages and
> functioning in their normal states if Zookeeper lost its quorum?
>
> Thanks,
> Connie
>
--
-- Guozhang