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Kafka, mail # user - Re: delete a topic


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Re: delete a topic
Neha Narkhede 2013-08-23, 15:33
By that, I meant bringing down all brokers, deleting zookeeper data and
kafka data and restarting the brokers. I suspect attempting a delete topic
might have caused something bad to happen on the ISR side. It will be great
if you can start clean and then see if the ISR is still an issue.

Also, I filed a bug to include a tool that makes it easy to check the
replica lag and progress, while troubleshooting ISR membership issues -
https://issues.apache.org/jira/browse/KAFKA-1021

Thanks,
Neha
On Fri, Aug 23, 2013 at 6:34 AM, Yu, Libo <[EMAIL PROTECTED]> wrote:

> Hi Neha,
>
> "Wipe out the cluster" Do you mean you uninstall the cluster and reinstall
> it?
> Or you just delete all kafka data and zookeeper data for the cluster?
> This is not a blocking issue for us. Our blocking issue is that some
> broker will
> fall out of ISR and never get back to it. We have observed that from more
> that one clusters. I am not sure if it is related to the deleting issue.
>
> Regards,
>
> Libo
>
>
> -----Original Message-----
> From: Neha Narkhede [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 22, 2013 5:01 PM
> To: [EMAIL PROTECTED]
> Subject: Re: delete a topic
>
> In production, we are not deleting topics yet. In test environments, if we
> have to delete topics, we wipe out the cluster. If this is a feature that
> most users are blocked on, I think it makes sense to prioritize
> https://issues.apache.org/jira/browse/KAFKA-330.
>
> Thanks,
> Neha
>
>
> On Thu, Aug 22, 2013 at 1:01 PM, Vadim Keylis <[EMAIL PROTECTED]>
> wrote:
>
> > How do you guys delete a topic if such need arise?
> >
> >
> > On Thu, Aug 22, 2013 at 12:29 PM, Neha Narkhede
> > <[EMAIL PROTECTED]
> > >wrote:
> >
> > > I mentioned this in a different thread. I think the
> > 0.8.0-beta1-candidate1
> > > includes the script, but we have removed it later. I think when we
> > publish
> > > 0.8-final, this should be resolved.
> > >
> > > Thanks,
> > > Neha
> > >
> > >
> > > On Thu, Aug 22, 2013 at 12:24 PM, Neha Narkhede
> > > <[EMAIL PROTECTED]
> > > >wrote:
> > >
> > > > Vadim,
> > > >
> > > > The JIRA tracking this feature is
> > > > https://issues.apache.org/jira/browse/KAFKA-330.
> > > > Until we have this feature, we should remove any scripts that give
> > > > the impression of deleting a topic, as Jay suggested. I tried
> > > > looking under bin/ but couldn't find any delete topic or partition
> script.
> > > >
> > > > Can you tell us which script you are using?
> > > >
> > > > Thanks,
> > > > Neha
> > > >
> > > >
> > > > On Thu, Aug 22, 2013 at 11:40 AM, Vadim Keylis
> > > ><[EMAIL PROTECTED]
> > > >wrote:
> > > >
> > > >> Jay or Neha. What is the process of deleting the topic if the
> > > >> script included in the repository creates false impression?
> > > >>
> > > >> Thanks,
> > > >> Vadim
> > > >>
> > > >>
> > > >> On Thu, Aug 22, 2013 at 11:14 AM, Jay Kreps <[EMAIL PROTECTED]>
> > > wrote:
> > > >>
> > > >> > We should really remove the delete script from 0.8 if we plan
> > > >> > to
> > > release
> > > >> > without delete support. Right now it appears to work but
> > > >> > doesn't
> > which
> > > >> is
> > > >> > clearly not good.
> > > >> >
> > > >> > -Jay
> > > >> >
> > > >> >
> > > >> > On Thu, Aug 22, 2013 at 10:57 AM, Neha Narkhede <
> > > >> [EMAIL PROTECTED]
> > > >> > >wrote:
> > > >> >
> > > >> > > We currently don't have the delete topic feature in Kafka
> > > >> > > 0.8. So
> > > any
> > > >> > > manual attempts to do so might have a negative impact on
> > > >> functionality.
> > > >> > >
> > > >> > > Thanks,
> > > >> > > Neha
> > > >> > >
> > > >> > >
> > > >> > > On Thu, Aug 22, 2013 at 10:30 AM, Yu, Libo <[EMAIL PROTECTED]>
> > > wrote:
> > > >> > >
> > > >> > > > Hi team,
> > > >> > > >
> > > >> > > > When I delete a topic, the topic is deleted from zookeeper
> > > >> > > > but
> > its
> > > >> log
> > > >> > > > files are not deleted from
> > > >> > > > Brokers.
> > > >> > > >
> > > >> > > > When I restart a  broker, the broker will try to sync the