Hi,

Request your expertise on these doubts of mine

Thanks,
Prabhjot

On Thu, Nov 26, 2015 at 4:43 PM, Prabhjot Bharaj <prabhbha...@gmail.com>
wrote:

> Hi,
>
> We arrange our kafka machines in groups and deploy these phases.
>
> For kafka, we’ll have to map groups with phases. During each phase of the
> release, all the machines in that group can go down.
>
> When this happens, there are a couple of cases:-
>
>    1. All replicas are residing in a group of machines which will all go
>    down in this phase
>       - Affect on Producer –
>          - What happens to the produce requests (whether produce can
>          dynamically keep writing to the remaining partitions now)
>          - What happens to the already queued requests which were being
>          sent to the earlier replicas – they will fail (we’ll have to use 
> producer
>          callback feature to take care of retrying in case the above step
>          works fine)
>       - Affect on Consumer -
>          - Can the consumers consume from a lesser number of partitions?
>          - Does the consumer 'consume' api gives any callback/failure
>          when all replicas of a partition go down?
>
> If you have come across any of the above cases, please provide how you
> solved the problem ? or whether everything works just well with Kafka
> during deployments and my cases described above are all invalid or handled
> by kafka and its clients internally ?
>
> Thanks,
> Prabhjot
>



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