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From Dong Lin <lindon...@gmail.com>
Subject Re: [DISCUSS] KIP-232: Detect outdated metadata by adding ControllerMetadataEpoch field
Date Wed, 06 Dec 2017 18:57:47 GMT
Bump up the thread.

It will be great to have more comments on whether we should do it or
whether there is better way to address the motivation of this KIP.

On Mon, Dec 4, 2017 at 3:09 PM, Dong Lin <lindong28@gmail.com> wrote:

> I don't have an interesting rejected alternative solution to put in the
> KIP. If there is good alternative solution from anyone in this thread, I am
> happy to discuss this and update the KIP accordingly.
>
> Thanks,
> Dong
>
> On Mon, Dec 4, 2017 at 1:12 PM, Ted Yu <yuzhihong@gmail.com> wrote:
>
>> It is clearer now.
>>
>> I noticed that Rejected Alternatives section is empty.
>> Have you considered any alternative ?
>>
>> Cheers
>>
>> On Mon, Dec 4, 2017 at 1:07 PM, Dong Lin <lindong28@gmail.com> wrote:
>>
>> > Ted, thanks for catching this. I have updated the sentence to make it
>> > readable.
>> >
>> > Thanks,
>> > Dong
>> >
>> > On Sat, Dec 2, 2017 at 3:05 PM, Ted Yu <yuzhihong@gmail.com> wrote:
>> >
>> > > bq. It the controller_epoch of the incoming MetadataResponse, or if
>> the
>> > > controller_epoch is the same but the controller_metadata_epoch
>> > >
>> > > Can you update the above sentence so that the intention is clearer ?
>> > >
>> > > Thanks
>> > >
>> > > On Fri, Dec 1, 2017 at 6:33 PM, Dong Lin <lindong28@gmail.com> wrote:
>> > >
>> > > > Hi all,
>> > > >
>> > > > I have created KIP-232: Detect outdated metadata by adding
>> > > > ControllerMetadataEpoch field:
>> > > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
>> > > > 232%3A+Detect+outdated+metadata+by+adding+
>> > ControllerMetadataEpoch+field
>> > > > .
>> > > >
>> > > > The KIP proposes to add fields in MetadataResponse and
>> > > > UpdateMetadataRequest so that client can reject outdated metadata
>> and
>> > > avoid
>> > > > unnecessary OffsetOutOfRangeException. Otherwise there is currently
>> > race
>> > > > condition that can cause consumer to reset offset which negatively
>> > affect
>> > > > the consumer's availability.
>> > > >
>> > > > Feedback and suggestions are welcome!
>> > > >
>> > > > Regards,
>> > > > Dong
>> > > >
>> > >
>> >
>>
>
>

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