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https://issues.apache.org/jira/browse/KAFKA-3128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15264445#comment-15264445
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Jun Rao commented on KAFKA-3128:
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[~fpj], yes, it's a good idea to track both session expirations and connection
losses. Anything else worth tracking?
[~ijuma], I recommend that we continue using kafka.metrics.KafkaMetricsGroup on
the broker side for now until when we want to migrate all metrics to
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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