解决dubbo 错误ip及ip乱入的问题

问题

在本地启动dubbo时，服务注册在本地的zookeeper ，但是注册IP却不是本地的
iP。产生问题，导致consumer 找不到provider ，访问不了服务。

• 例如 本地IP为 10.0.0.1 ，但是zookeeper上的注册ip 可能是 196.168.0.1

产生原因，随机产生，可能是你重启一下机器，或者电脑小智一段时间就会发生。

• 报错类似

com.alibaba.dubbo.remoting.RemotingException: client(url: dubbo://100.106.199.34:20880/con.xxxx.xxxx.xxxx.xxxx.NginxLogService?accesslog=./logs/xxxx-xxxx-provider-dubbo.log&anyhost=true&application=xxxx-xxxx&check=false&codec=dubbo&default.accesslog=true&default.check=false&default.delay=-1&default.loadbalance=roundrobin&default.retries=0&default.timeout=60000&delay=-1&dubbo=2.8.4&generic=false&heartbeat=60000&interface=cn.xxxx.xxxx.xxxx.xxxx.NginxLogService&logger=slf4j&methods=getModelPage&organization=xxxx&owner=xxxx&pid=38690&side=consumer×tamp=1545988767460) failed to connect to server /100.106.199.34:20880 client-side timeout 3000ms (elapsed: 3004ms) from netty client 100.106.199.34 using dubbo version 2.8.4
	at com.alibaba.dubbo.remoting.transport.netty.NettyClient.doConnect(NettyClient.java:147)
	at com.alibaba.dubbo.remoting.transport.AbstractClient.connect(AbstractClient.java:280)
	at com.alibaba.dubbo.remoting.transport.AbstractClient$1.run(AbstractClient.java:145)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

Caused by: org.springframework.remoting.RemoteConnectFailureException: Could not connect to remote service [rmi://192.168.72.235:20881/com.ztesoft.zsmartcity.ynzw.demo.service.DemoService]; nested exception is java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: 

Caused by: java.lang.IllegalStateException: Failed to check the status of the service com.xxx.xxx.service.LoginService. No provider available for the service com.xxxx.xxxx.service.LoginService:3.0 from the url zookeeper://202.106.199.37:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=xxx&application.version=3.0&check=false&default.timeout=5000&dubbo=2.5.3&interface=com.xxx.xxx.service.LoginService&methods=aLogin,bPassword,userLogin,modifyPasswordLogin,validate,fVersion,xLogout,userLogout,getTest,getCode,aLogin,aToken,aUser&pid=2200&revision=1.0&side=consumer×tamp=1462534379328&version=3.0 to the consumer 202.106.199.37 use dubbo version 2.5.3

解决方法

在程序配置文件中 配置dubbo 的注册中心“dubbo.registry.address” 时要注意不要配置127.0.0.1 要配置为 localhost。

然后在配置 本地的/etc/hosts 文件中

127.0.0.1 localhost 

问题原因

怀疑原因：为本地配置127.0.0.1 时由于连着网络所以dns 解析解析到了你的网络上了。么有解析到本机造成的。但是并不确定是不是这个原因。