* [WARN ][org.apache.kafka.common.utils.LogContext$KafkaLogger.warn(LogContext.java:241)]:[Producer clientId=producer-1] Connection to node -1 could not be established. Broker may not be available.
* [ERROR][org.springframework.kafka.support.LoggingProducerListener.onError(LoggingProducerListener.java:76)]:Exception thrown when sending a message with key='xxx' and payload='xxx' to topic bgt.basic.agency.frame.topic: