[jira] [Updated] (KAFKA-17230) Kafka consumer client doesn't report node request-latency metrics

["Jun Rao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-17230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jun Rao updated KAFKA-17230:
----------------------------
    Fix Version/s: 4.0.0
                       (was: 3.9.0)

> Kafka consumer client doesn't report node request-latency metrics
> -----------------------------------------------------------------
>
>                 Key: KAFKA-17230
>                 URL: https://issues.apache.org/jira/browse/KAFKA-17230
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients, consumer, metrics
>            Reporter: Apoorv Mittal
>            Assignee: Apoorv Mittal
>            Priority: Major
>              Labels: client, consumer
>             Fix For: 4.0.0
>
>
> Kafka Consumer client registers node/connection latency metrics in [Selector.java|https://github.com/apache/kafka/blob/9d634629f29cd402a723d7e7bece18c8099065a4/clients/src/main/java/org/apache/kafka/common/network/Selector.java#L1359] but the values against the metric is never recorded. This seems to be an issue since inception. However, the same metric is also created for Kafka Producer but the value is recorded for Kafka Producer in [Sender.java|https://github.com/apache/kafka/blob/9d634629f29cd402a723d7e7bece18c8099065a4/clients/src/main/java/org/apache/kafka/clients/producer/internals/Sender.java#L1092]. Hence node - request-latency-max and request-latency-avg appears correctly for Kafka Producer but is NaN for Kafka Consumer.



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