org.springframework.amqp.AmqpTimeoutException: No available channels

rabbitmq消費者報錯

接手前同事項目 新加一個queue 報錯 No available channels

rabbitmq配置

spring:
  rabbitmq:
    cache:
      channel:
         size: 24

原因：項目指定的concurrency總數已經 24個

@RabbitListener(queues = {"${mq.queue.name}"}, concurrency = "8")

解決：24加大