手动ack报错

报错内容：

java.lang.IllegalStateException: Channel closed; cannot ack/nack

可能1，rabbitmq的配置文件需要设置

spring:
  rabbitmq:
    listener:
      direct:
        #手动确认
        acknowledge-mode: manual
      simple:
        #手动确认
        acknowledge-mode: manual

可能2，可能我们在工厂里设置了自己的json解析器，需要在工厂类里再次重新设置一下手动ack

    @Bean
    public RabbitListenerContainerFactory<?> rabbitListenerContainerFactory(ConnectionFactory connectionFactory){
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        factory.setMessageConverter(new Jackson2JsonMessageConverter());
        factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);             //开启手动 ack
        return factory;
    }