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https://issues.apache.org/jira/browse/KAFKA-4982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16004675#comment-16004675
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Edoardo Comar commented on KAFKA-4982:
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The implementation took the slight deviation from the KIP screenshots of adding
the {{listener}} tag only if it differs from {{protocol}}.
We should have taken this decision while discussing the KIP. Opinions?
> Add listener tag to socket-server-metrics.connection-... metrics
> ------------------------------------------------------------------
>
> Key: KAFKA-4982
> URL: https://issues.apache.org/jira/browse/KAFKA-4982
> Project: Kafka
> Issue Type: Improvement
> Reporter: Edoardo Comar
> Assignee: Edoardo Comar
> Fix For: 0.11.0.0
>
>
> Metrics in socket-server-metrics like connection-count connection-close-rate
> etc are tagged with networkProcessor:<id>
> where the id of a network processor is just a numeric integer.
> If you have more than one listener (eg PLAINTEXT, SASL_SSL, etc.), the id
> just keeps incrementing and when looking at the metrics it is hard to match
> the metric tag to a listener.
> You need to know the number of network threads and the order in which the
> listeners are declared in the brokers' server.properties.
> We should add a tag showing the listener label, that would also make it much
> easier to group the metrics in a tool like grafana
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