Spring+dubbo project error: Failed to bind NettyServer on /192.168.50.12:31581, cause: Fail

2016-11-30 09:21:02 643 ERROR - ContextLoader.initWebApplicationContext(331) | Context initialization failed 
com.alibaba.dubbo.rpc.RpcException: Fail to start server(url: dubbo://192.168.50.12:31581/com.able.livecourse.rmi.service.LiveCourseRmiService?anyhost=true&application=livecourse&channel.readonly.sent=true&codec=dubbo&default.delay=-1&default.retries=0&default.timeout=10000&delay=-1&dubbo=2.5.3&heartbeat=60000&interface=com.able.livecourse.rmi.service.LiveCourseRmiService&methods=searchCourseLivingToApp,signOutVirtualCourseUser,insertVirtualCourse,findVirtualStartUrlBycourseId,updateLiveCourse,insertLiveSatisfact,findUserSatisfactByIds,canWatchLiveCourse,deleteLiveCourseByCourseId,updateVirtualCourse,searchCourseList,deleteVirtualCourse,zhsLoginCheck,joinVirtualCourseRecordUser,insertLiveCourse,searchHistoryLiveList&monitor=dubbo%3A%2F%2Fzookeeper1.ablejava.com%3A2181%2Fcom.alibaba.dubbo.registry.RegistryService%3Fapplication%3Dlivecourse%26backup%3Dzookeeper2.ablejava.com%3A2181%2Czookeeper3.ablejava.com%3A2181%26dubbo%3D2.5.3%26pid%3D4504%26protocol%3Dregistry%26refer%3Ddubbo%253D2.5.3%2526interface%253Dcom.alibaba.dubbo.monitor.MonitorService%2526pid%253D4504%2526timestamp%253D1480468862625%26registry%3Dzookeeper%26timestamp%3D1480468862610&pid=4504&revision=pc&side=provider&timeout=10000×tamp=1480468862611&version=pc) Failed to bind NettyServer on /192.168.50.12:31581, cause: Failed to bind to: /0.0.0.0:31581 MonitorService%2526pid%253D4504%2526timestamp%253D1480468862625%26registry%3Dzookeeper%26timestamp%3D1480468862610&pid=4504&revision=pc&side=provider&timeout=10000×tamp=1480468862611&version=pc) Failed to bind NettyServer on /192.168.50.12:31581, cause: Failed to bind to: /0.0.0.0:31581 MonitorService%2526pid%253D4504%2526timestamp%253D1480468862625%26registry%3Dzookeeper%26timestamp%3D1480468862610&pid=4504&revision=pc&side=provider&timeout=10000×tamp=1480468862611&version=pc) Failed to bind NettyServer on /192.168.50.12:31581, cause: Failed to bind to: /0.0.0.0:31581 
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:289) 
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.openServer(DubboProtocol.java:266) 
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.export(DubboProtocol.java:253) 
    at com.alibaba.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:56) 
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:55) 
    at com.alibaba.dubbo.rpc.Protocol$Adpative.export(Protocol$Adpative.java) 
    at com.alibaba.dubbo.registry.integration.RegistryProtocol.doLocalExport(RegistryProtocol.java:153) 
    at com.alibaba.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:107) 
    at com.alibaba.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:54) 
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:53) 
    at com.alibaba.dubbo.rpc.Protocol$Adpative.export(Protocol$Adpative.java) 
    at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:485) 
    at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:281) 
    at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:242) 
    at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:143) 
    at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:109) 
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:151) 
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:128) 
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:331) 
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:773) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:483) 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5118) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5634) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) 
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899) 
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875) 
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) 
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1260) 
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:2002) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: com.alibaba.dubbo.remoting.RemotingException: Failed to bind NettyServer on /192.168.50.12:31581, cause: Failed to bind to: /0.0.0.0:31581 


windows:
View port occupancy (get process ID)
netstat - aon|findstr "31581"
view task port (get process name)
tasklist|findstr "6916"
end task
taskkill /pid 6916 -t -f


linux:
netstat -tunlp|grep 18191
ps -ef|grep 23049
kill -9 tomcat