Jun Rao created KAFKA-3653:
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Summary: expose the queue size in ControllerChannelManager
Key: KAFKA-3653
URL: https://issues.apache.org/jira/browse/KAFKA-3653
Project: Kafka
Issue Type: Improvement
Reporter: Jun Rao
Currently, ControllerChannelManager maintains a queue per broker. If the queue
fills up, metadata propagation to the broker is delayed. It would be useful to
expose a metric on the size on the queue for monitoring.
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