Sorry, am a newbie myself, I was adding to the scenario where broker has
gone down and not come up when replication is 1, and a new leader is
elected, it will be the leader for this topic/partition, but if other
broker is down, it might not have the offsets?

On Sat, Aug 13, 2016 at 1:22 PM, Sudev A C <sudev...@goibibo.com> wrote:

> No why wouldn't the partition come back ?
> Before preferred election there was leader serving the requests
> during election when it tries to elect the preferred leader and the
> preferred leader happens not to be in in ISR, fallback to leader leader
> happens. After this producing/consuming from this partition fails.
>
> On Sunday 14 August 2016, R Krishna <krishna...@gmail.com> wrote:
>
> > But, isn't that assuming your topics are replicated to all brokers, in
> your
> > case there are no offsets probably for this reason too.
> >
> > On Fri, Aug 12, 2016 at 2:23 PM, Zakee <kzak...@netzero.net
> <javascript:;>>
> > wrote:
> >
> > > Typically "preferred leader election” would fail if/when one or more
> > > brokers still did not come back online after being down for some time.
> Is
> > > that your scenario?
> > >
> > > -Zakee
> > >
> > > > On Aug 11, 2016, at 12:42 AM, Sudev A C <sudev...@goibibo.com
> > <javascript:;>> wrote:
> > > >
> > > > Hi,
> > > >
> > > > With *auto.leader.rebalance.enable=true* Kafka runs preferred
> election
> > > tool
> > > > in regular intervals rebalancing topic-partition leaders. Now if
> > > preferred
> > > > election fails to elect the preferred leader for a topic partition it
> > > falls
> > > > back to any other leader in ISR.
> > > >
> > > > But for us in production when this happens, the newly elected leader
> > > fails
> > > > to serve/produce messages anymore. If you describe the topic the
> latest
> > > > offset shown is *0* but a leader is shown.
> > > >
> > > > My current fix is to restart the controller broker.
> > > > 1. New controller comes up..fresh preferred election happens .
> > > > 2. During this time around offsets comes back to a number from zero.
> > > >
> > > > Log - http://pastebin.com/raw/qeBnNPA6#
> > > > Kafka Version - 0.9.1
> > > >
> > > > Should I turn off auto.leader.rebalance or can I work around this
> > > problem.
> > > > Any suggestions ?
> > > > Why would offset go to zero ?
> > > >
> > > > --
> > > > Thanks
> > > > Sudev Ambadi
> > >
> > >
> > > ____________________________________________________________
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> >
> >
> > --
> > Radha Krishna, Proddaturi
> > 253-234-5657
> >
>
>
> --
> Thanks
> Sudev A C
> Data Team
>



-- 
Radha Krishna, Proddaturi
253-234-5657

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