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Discussion thread: here

JIRA: TBD 

Jira
serverASF JIRA
columnIdsissuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution
columnskey,summary,type,created,updated,due,assignee,reporter,priority,status,resolution
serverId5aa69414-a9e9-3523-82ec-879b028fb15b
keyKAFKA-15995

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

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The following plugins will not support this feature:

ClassConfigReason
KafkaMetricsReporterkafka.metrics.reportersThis interface is technically not part of the public API. Since MetricsReporter will not support it, it makes sense to not add it to this one either.
ConsumerPartitionAssignorpartition.assignment.strategyThis interface does not have a close() method.
DeserializationExceptionHandlerdefault.deserialization.exception.handlerThis interface does not have a close() method.
ProductionExceptionHandlerdefault.production.exception.handlerThis interface does not have a close() method.
TimestampExtractordefault.timestamp.extractorThis interface does not have a close() method.
RocksDBConfigSetterrocksdb.config.setterThis interface does not have a close() method.
SecurityProviderCreatorsecurity.providersThis interface does not have a close() method. The instance is passed to java.security.Security and we don't control its lifecycle.
ReplicationPolicyreplication.policy.classMirrorMaker currently uses its own mechanism to emit metrics. This interface does not have a close() method.
ConfigPropertyFilterconfig.property.filter.classMirrorMaker currently uses its own mechanism to emit metrics.
GroupFiltergroup.filter.classMirrorMaker currently uses its own mechanism to emit metrics.
TopicFiltertopic.filter.classMirrorMaker currently uses its own mechanism to emit metrics.
ForwardingAdminforwarding.admin.classMirrorMaker currently uses its own mechanism to emit metrics.

If we decide that some of these plugins would benefit from being able to emit metrics, we could make the necessary API changes in the future to support them.

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