错误复现:
Unhandled exception. RabbitMQ.Client.Exceptions.AlreadyClosedException: Already closed: The AMQP operation was interrupted: AMQP close-reason, initiated by Peer, code=406, text='PRECONDITION_FAILED - delivery acknowledgement on channel 1 timed out. Timeout value used: 1800000 ms. This timeout value can be configured, see consumers doc guide to learn more', classId=0, methodId=0
这个错误发生在 RabbitMQ 客户端,提示连接已经被关闭,并给出了关闭的原因:
- close-reason,由对等方(Peer)发起;
- code=406,表示 PRECONDITION_FAILED;
- text=‘PRECONDITION_FAILED - delivery acknowledgement on channel 1 timed out. Timeout value used: 1800000 ms. This timeout value can be configured, see consumers doc guide to learn more’,说明是因为一个名为“channel 1”的通道上的消息确认超时了,并且在规定的时间内没有得到确认。在这里,超时值为 1800000 毫秒(30 分钟)。
那么如何解决呢,只要配置ack的超时时间即可,官方说明:
https://www.rabbitmq.com/consumers.html#acknowledgement-timeout
如果你是docker环境,那么有一点坑,就是通过环境变量所配置的consumer_timeout
是不生效的,如下:
version: "3"
services:
rabbitmq:
image: rabbitmq:3.8-management-alpine
environment:
- RABBITMQ_CONSUMER_TIMEOUT=600000 # 设置consumer_timeout参数为600000毫秒
需要在配置文件中动态设置参数:
version: "3"
services:
rabbitmq:
image: rabbitmq:3.8-management-alpine
volumes:
- ./rabbitmq.conf:/etc/rabbitmq/rabbitmq.conf
environment:
- RABBITMQ_CONFIG_FILE=/etc/rabbitmq/rabbitmq.conf
在rabbitmq.conf文件中,设置consumer_timeout参数。如下:
default_pass = guest
default_user = guest
default_vhost = /
consumer_timeout = 600000