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https://issues.apache.org/jira/browse/KAFKA-17222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai resolved KAFKA-17222.
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Fix Version/s: 4.0.0
Resolution: Fixed
> Remove the subclass of KafkaMetricsGroup
> ----------------------------------------
>
> Key: KAFKA-17222
> URL: https://issues.apache.org/jira/browse/KAFKA-17222
> Project: Kafka
> Issue Type: Improvement
> Reporter: Chia-Ping Tsai
> Assignee: bboyleonp
> Priority: Minor
> Fix For: 4.0.0
>
>
> There are subclass of KafkaMetricsGroup which have override `metricName`
> [0][1][2]. They are used to keep metrics compatibility. Now,
> KafkaMetricsGroup has the new constructor which can define the package and
> class name, and so we don't need to override the `metricName` anymore.
> [0]
> https://github.com/apache/kafka/blob/9e06767ffa80b26791c3bff6bc9b10b6612ce7d2/core/src/main/scala/kafka/log/UnifiedLog.scala#L116
> [1]
> https://github.com/apache/kafka/blob/9e06767ffa80b26791c3bff6bc9b10b6612ce7d2/storage/src/main/java/org/apache/kafka/storage/internals/log/LogSegment.java#L77
> [2]
> https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/server/KafkaBroker.scala#L109
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