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From Jun Rao <jun...@gmail.com>
Subject Re: Leader: -1 on Kafka
Date Tue, 22 Apr 2014 15:07:04 GMT
If you only have 1 replica, when the broker the replica is down, the
partition will have no leader. A broker can be down due to soft failures.
See
https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-Whypartitionleadersmigratethemselvessometimes
?

Thanks,

Jun


On Mon, Apr 21, 2014 at 1:36 PM, Kashyap Mhaisekar <kashyap.m@gmail.com>wrote:

> Yes.
> I have 3 kafka brokers and I have created one topic with 1 partition and 1
> replication (default options). All params are default. I was testing it
> with heavy load and had a storm reading from this and suddenly the messages
> stop. kafka's list topics script files then show the leader as -1.
>
> I got the same error even with 2 partitions and default replication.
>
> Regards,
> Kashyap
>
>
> On Mon, Apr 21, 2014 at 1:26 PM, Joel Koshy <jjkoshy.w@gmail.com> wrote:
>
> > Can you describe your set up in more detail and also if you can
> > reproduce this easily? This can happen when none of the replicas for a
> > partition are available, but cannot comment further without details.
> >
> > On Mon, Apr 21, 2014 at 10:54:59AM -0500, Kashyap Mhaisekar wrote:
> > > Hi,
> > > At times, some of kafka topics end up showing the leader as -1. After
> > this,
> > > the messages dont get added to the topic nor consumed. I tried digging
> > into
> > > why the leader turns -1 *(leader: -1)*
> > >
> > > Is there a reason why this happens and how it can be resolved?
> > >
> > > Regards,
> > > kashyap
> >
> >
>

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