Boyang Chen created KAFKA-9751:
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             Summary: Admin `FindCoordinator` call should go to controller 
instead of ZK
                 Key: KAFKA-9751
                 URL: https://issues.apache.org/jira/browse/KAFKA-9751
             Project: Kafka
          Issue Type: Sub-task
            Reporter: Boyang Chen


In current trunk, we are still going to use ZK for topic creation in the 
routing of FindCoordinatorRequest:
 val (partition, topicMetadata) = 
CoordinatorType.forId(findCoordinatorRequest.data.keyType) match {
        case CoordinatorType.GROUP =>
          val partition = 
groupCoordinator.partitionFor(findCoordinatorRequest.data.key)
          val metadata = getOrCreateInternalTopic(GROUP_METADATA_TOPIC_NAME, 
request.context.listenerName)
          (partition, metadata)
Which should be migrated to controller handling



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