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Kafka >> mail # user >> No leaders elected after topics created


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Vadim Keylis 2013-08-22, 17:02
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Neha Narkhede 2013-08-22, 18:06
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Vadim Keylis 2013-08-22, 18:30
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Re: No leaders elected after topics created
I see the issue. I think the 0.8-beta included the script, but we later
removed it. We still don't have support for the delete topic feature, so I
recommend not using it.

How long did you wait for the leaders to get elected before you attempted
to delete the topics?

Thanks,
Neha
On Thu, Aug 22, 2013 at 11:30 AM, Vadim Keylis <[EMAIL PROTECTED]>wrote:

> Hello Neha. The topics should of been available since I ran list-topics
> script 5 hours later after creating topics.
> I am reffering to kafka-delete-topic.sh script that I got from kafka git
> repository.
>
> Thanks,
> Vadim
>
>
> On Thu, Aug 22, 2013 at 11:05 AM, Neha Narkhede <[EMAIL PROTECTED]
> >wrote:
>
> > As part of topic creation, the controller broker has to elect leader for
> > each of the topics and this involves a few writes to zookeeper. So it
> might
> > take several seconds to complete leader election for 300 topics and that
> > time would increase if you have many partitions per topic.
> >
> > Which delete partition script are you referring to? We don't have a
> delete
> > topic feature in Kafka yet. So you can only create more partitions, but
> not
> > delete them.
> >
> > Thanks,
> > Neha
> >
> >
> > On Thu, Aug 22, 2013 at 10:01 AM, Vadim Keylis <[EMAIL PROTECTED]
> > >wrote:
> >
> > > I ran command to create 300 topics sequentially. Kafka create topic
> > script
> > > return with topic created successfully message. However running
> > > kafka-list-topics.sh script showed to me that no leaders been selected
> > and
> > > no servers listed in ISR. First inspection of the logs showed no
> obvious
> > > signs of the problem. After restarting kafka. I did a few restarts of
> > kafka
> > > service and its now showing that most partitions have brokers.
> > >
> > > Second issue is with delete partition script. I attempted to delete
> > topics
> > > to begin fresh start.  Even those script says it deleted partition
> > > successfully, I still see no leader found exception.
> > >
> > >  Any suggestions on whats going on and how to avoid in the future?
> > >
> >
>

 
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Vadim Keylis 2013-08-22, 20:13
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Jun Rao 2013-08-23, 04:00
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Vadim Keylis 2013-08-24, 05:48