前提：使用docker安裝了rocketmq,docker安裝請查看上一篇 docker快速部署rocketmq
1、測試發送消息，錯誤信息如下：
Caused by: org.apache.rocketmq.remoting.exception.RemotingConnectException: connect to <172.18.0.4:10911> failed
at org.apache.rocketmq.remoting.netty.NettyRemotingClient.invokeSync(NettyRemotingClient.java:392)
at org.apache.rocketmq.client.impl.MQClientAPIImpl.sendMessageSync(MQClientAPIImpl.java:465)
at org.apache.rocketmq.client.impl.MQClientAPIImpl.sendMessage(MQClientAPIImpl.java:449)
at org.apache.rocketmq.client.impl.MQClientAPIImpl.sendMessage(MQClientAPIImpl.java:403)
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendKernelImpl(DefaultMQProducerImpl.java:831)
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendDefaultImpl(DefaultMQProducerImpl.java:557)
... 4 more
16:21:29.038 [NettyClientSelector_1] INFO RocketmqRemoting - closeChannel: close the connection to remote address[] result: true
2、錯誤原因：連接超時，172.18.0.4是內網ip。
3、解決方案：進入容器，修改配置：
docker exec -it --user root rmqbroker bash
cd ../conf
vi broker.conf
配置信息如下：
4.重啟broker，修改生效，即可以正常訪問。