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https://issues.apache.org/jira/browse/KAFKA-3516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Manikumar Reddy reassigned KAFKA-3516:
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Assignee: Manikumar Reddy
> Metrics settings in server.properties cause ClassCastException
> --------------------------------------------------------------
>
> Key: KAFKA-3516
> URL: https://issues.apache.org/jira/browse/KAFKA-3516
> Project: Kafka
> Issue Type: Bug
> Components: config
> Affects Versions: 0.9.0.1
> Reporter: Scott Kruger
> Assignee: Manikumar Reddy
>
> The docs indicate that metrics reporters should be enabled with the
> `metric.reporters` setting in `server.properties`. However, setting it to
> `kafka.metrics.KafkaCSVMetricsReporter` causes the following exception in the
> server log:
> {noformat}
> [2016-04-06 16:17:42,010] FATAL (kafka.Kafka$)
> java.lang.ClassCastException: class kafka.metrics.KafkaCSVMetricsReporter
> at java.lang.Class.asSubclass(Class.java:3404)
> at org.apache.kafka.common.utils.Utils.newInstance(Utils.java:328)
> at
> org.apache.kafka.common.config.AbstractConfig.getConfiguredInstances(AbstractConfig.java:202)
> at kafka.server.KafkaConfig.<init>(KafkaConfig.scala:830)
> at kafka.server.KafkaConfig$.fromProps(KafkaConfig.scala:698)
> at kafka.server.KafkaConfig$.fromProps(KafkaConfig.scala:695)
> at
> kafka.server.KafkaServerStartable$.fromProps(KafkaServerStartable.scala:28)
> at kafka.Kafka$.main(Kafka.scala:58)
> at kafka.Kafka.main(Kafka.scala)
> {noformat}
> Using the `kafka.metrics.reporters` setting instead fixes the issue.
> I imagine that either the docs are wrong, or that setting is meant for other
> metrics reporters.
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