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https://issues.apache.org/jira/browse/KAFKA-766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joe Stein updated KAFKA-766:
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Fix Version/s: 0.8.3
> Isr shrink/expand check is fragile
> ----------------------------------
>
> Key: KAFKA-766
> URL: https://issues.apache.org/jira/browse/KAFKA-766
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.8.0
> Reporter: Sriram Subramanian
> Assignee: Neha Narkhede
> Fix For: 0.8.3
>
>
> Currently the isr check is coupled tightly with the produce batch size. For
> example, if the producer batch size is 10000 messages and isr check is 4000
> messages, we continuously oscillate between shrinking isr and expanding isr
> every second. This is because a single produce request throws the replica out
> of the isr. This results in hundreds of calls to ZK (we still dont have multi
> write). This can be alleviated by making the producer batch size smaller than
> the isr check size.
> Going forward, we should try to not have this coupling. It is worth
> investigating if we can make the check more robust under such scenarios.
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