rocketmq学习过程中踩过的坑总结
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 &