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https://issues.apache.org/jira/browse/KAFKA-4819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15889006#comment-15889006
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Matthias J. Sax commented on KAFKA-4819:
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[~fhussonnois] Thanks for the JIRA an PR. All public API changes require a KIP:
https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals
> Expose states of active tasks to public API
> -------------------------------------------
>
> Key: KAFKA-4819
> URL: https://issues.apache.org/jira/browse/KAFKA-4819
> Project: Kafka
> Issue Type: New Feature
> Components: streams
> Affects Versions: 0.10.2.0
> Reporter: Florian Hussonnois
> Priority: Minor
> Labels: needs-kip
>
> In Kafka 0.10.1.0 the toString method of KafkaStreams class has been
> implemented mainly to ease topologies debugging. Also, the streams Metrics
> has been exposed to public API.
> But currently theres is no way to monitor kstreams tasks states, assignments
> or consumed offsets.
> I propose to expose the states of active tasks to the public API KafkaStreams.
> For instance, an application can expose a REST API to get the global state of
> a kstreams topology.
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