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https://issues.apache.org/jira/browse/KAFKA-3128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255378#comment-15255378
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Ismael Juma commented on KAFKA-3128:
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[~junrao], what do we use for new broker metrics such as this one: 
`kafka.metrics.KafkaMetricsGroup` or `org.apache.kafka.common.metrics.Metrics`?

> Add metrics for ZooKeeper events
> --------------------------------
>
>                 Key: KAFKA-3128
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3128
>             Project: Kafka
>          Issue Type: Improvement
>          Components: core, zkclient
>            Reporter: Flavio Junqueira
>            Assignee: Ismael Juma
>             Fix For: 0.10.0.0
>
>
> It would be useful to report via Kafka metrics the number of ZK event 
> notifications, such as connection loss events, session expiration events, 
> etc., as a way of spotting potential issues with the communication with the 
> ZK ensemble.



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