1.连接异常
前几天在虚拟机上部署了rocketmq，一切正常，今天把rocketmq搬到了我的云主机上，一直报错
Caused by: org.apache.rocketmq.remoting.exception.RemotingConnectException: connect to <10.19.73.64:10911> failed
反复检查了好几遍，根本没发现什么问题，也没在哪里配置过这个地址，在本地代码中，生产者类设置的namesrv的地址也是云主机的地址。
于是去看namesrv的运行日志
2018-04-21 00:13:09 INFO main - rocketmqHome=/usr/local/rocketmq-all/target/apache-rocketmq-all 2018-04-21 00:13:09 INFO main - kvConfigPath=/root/namesrv/kvConfig.json 2018-04-21 00:13:09 INFO main - configStorePath=/root/namesrv/namesrv.properties 2018-04-21 00:13:09 INFO main - productEnvName=center 2018-04-21 00:13:09 INFO main - clusterTest=false 2018-04-21 00:13:09 INFO main - orderMessageEnable=false 2018-04-21 00:13:09 INFO main - listenPort=9876 2018-04-21 00:13:09 INFO main - serverWorkerThreads=8 2018-04-21 00:13:09 INFO main - serverCallbackExecutorThreads=0 2018-04-21 00:13:09 INFO main - serverSelectorThreads=3 2018-04-21 00:13:09 INFO main - serverOnewaySemaphoreValue=256 2018-04-21 00:13:09 INFO main - serverAsyncSemaphoreValue=64 2018-04-21 00:13:09 INFO main - serverChannelMaxIdleTimeSeconds=120 2018-04-21 00:13:09 INFO main - serverSocketSndBufSize=4096 2018-04-21 00:13:09 INFO main - serverSocketRcvBufSize=4096 2018-04-21 00:13:09 INFO main - serverPooledByteBufAllocatorEnable=true 2018-04-21 00:13:09 INFO main - useEpollNativeSelector=false 2018-04-21 00:13:09 INFO main - The Name Server boot success. serializeType=JSON 2018-04-21 00:13:09 INFO NettyEventExecuter - NettyEventExecuter service started 2018-04-21 00:13:46 INFO NettyServerCodecThread_1 - NETTY SERVER PIPELINE: channelRegistered 127.0.0.1:48416 2018-04-21 00:13:46 INFO NettyServerCodecThread_1 - NETTY SERVER PIPELINE: channelActive, the channel[127.0.0.1:48416] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new topic registerd, BenchmarkTest QueueData [brokerName=broker-a, readQueueNums=1024, writeQueueNums=1024, perm=6, topicSynFlag=0] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new topic registerd, OFFSET_MOVED_EVENT QueueData [brokerName=broker-a, readQueueNums=1, writeQueueNums=1, perm=6, topicSynFlag=0] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new topic registerd, broker-a QueueData [brokerName=broker-a, readQueueNums=1, writeQueueNums=1, perm=7, topicSynFlag=0] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new topic registerd, TBW102 QueueData [brokerName=broker-a, readQueueNums=8, writeQueueNums=8, perm=7, topicSynFlag=0] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new topic registerd, SELF_TEST_TOPIC QueueData [brokerName=broker-a, readQueueNums=1, writeQueueNums=1, perm=6, topicSynFlag=0] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new topic registerd, DefaultCluster QueueData [brokerName=broker-a, readQueueNums=16, writeQueueNums=16, perm=7, topicSynFlag=0] 2018-04-21 00:13:46 INFO RemotingExecutorThread_1 - new broker registerd, 10.19.73.64:10911 HAServer: 10.19.73.64:10912
最后一行，broker居然也是注册到了这个地址，这个ip看着居然有点眼熟，于是打开了我的云主机，这不是我的内网IP吗！！！
原来rocketmq默认地址是内网ip，最后百度broker地址如何修改，将broker的配置文件
/usr/local/rocketmq-all/target/apache-rocketmq-all/conf/broker.conf
加上一行配置
brokerIP1 = 111.230.94.68
重启启动namesrv和broker，这里注意，我们启动broker时，原来是
nohup sh mqbroker -n localhost:9876 &
现在引用我们自定义的配置文件
nohup sh mqbroker -n localhost:9876 -c ../conf/broker.conf &然后把程序跑起来测试，OK了