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https://issues.apache.org/jira/browse/KAFKA-3761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on KAFKA-3761 started by Roger Hoover.
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> Controller has RunningAsBroker instead of RunningAsController state
> -------------------------------------------------------------------
>
> Key: KAFKA-3761
> URL: https://issues.apache.org/jira/browse/KAFKA-3761
> Project: Kafka
> Issue Type: Bug
> Reporter: Ismael Juma
> Assignee: Roger Hoover
>
> In `KafkaServer.start`, we start `KafkaController`:
> {code}
> /* start kafka controller */
> kafkaController = new KafkaController(config, zkUtils, brokerState,
> kafkaMetricsTime, metrics, threadNamePrefix)
> kafkaController.startup()
> {code}
> Which sets the state to `RunningAsController` in
> `KafkaController.onControllerFailover`:
> `brokerState.newState(RunningAsController)`
> And this later gets set to `RunningAsBroker`.
> This doesn't match the diagram in `BrokerStates`. [~junrao] suggested that we
> should start the controller after we register the broker in ZK, but this
> seems tricky as we need to controller in `KafkaApis`.
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