ClassBrokerMetadata@author zengqiao @date 19/4/3 存储Broker的元信息, 元信息对应的ZK节点是/brokers/ids/{brokerId} 节点结构: { "listener_security_protocol_map":{"SASL_PLAINTEXT":"SASL_
km-persistence/src/main/java/com/xiaojukeji/know/streaming/km/persistence/kafka/zookeeper/znode/brokers/BrokerMetadata.java:53