[BUG] AMQP protocol version mismatch exception

[oownahcohc]

버그 상황

@Bean
public ConnectionFactory connectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory(host, port);
    connectionFactory.setUsername(username);
    connectionFactory.setPassword(password);
    LOGGER.info("Create RabbitMQ connection factory with : " + username + "@" + host + ":" + port);
    return connectionFactory;
}

위와 같이 ConnectionFactory 가 성공적으로 생성되고 @Bean 을 통해 주입되는 것을 확인했다.

But

위와 같이 AMQP protocol version mismatch; we are version 0-9-1, server sent signature 3,1,0,0 라는 이유로 Exception 발생