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https://issues.apache.org/jira/browse/KAFKA-10027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Rao resolved KAFKA-10027.
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Fix Version/s: 2.7.0
Assignee: Kowshik Prakasam
Resolution: Fixed
merged the PR to trunk
> Implement read path for feature versioning scheme
> -------------------------------------------------
>
> Key: KAFKA-10027
> URL: https://issues.apache.org/jira/browse/KAFKA-10027
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Kowshik Prakasam
> Assignee: Kowshik Prakasam
> Priority: Major
> Fix For: 2.7.0
>
>
> Goal is to implement various classes and integration for the read path of the
> feature versioning system
> ([KIP-584|https://cwiki.apache.org/confluence/display/KAFKA/KIP-584%3A+Versioning+scheme+for+features]).
> The ultimate plan is that the cluster-wide *finalized* features information
> is going to be stored in ZK under the node {{/feature}}. The read path
> implemented in this PR is centered around reading this *finalized* features
> information from ZK, and, processing it inside the Broker.
>
> Here is a summary of what's needed for this Jira (a lot of it is *new*
> classes):
> * A facility is provided in the broker to declare it's supported features,
> and advertise it's supported features via it's own {{BrokerIdZNode}} under a
> {{features}} key.
> * A facility is provided in the broker to listen to and propagate
> cluster-wide *finalized* feature changes from ZK.
> * When new *finalized* features are read from ZK, feature incompatibilities
> are detected by comparing against the broker's own supported features.
> * {{ApiVersionsResponse}} is now served containing supported and finalized
> feature information (using the newly added tagged fields).
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