java.net.UnknownHostException异常处理

1.问题描述

　　最近迁移环境，在Linux系统下部署Java产品的应用，后台报出如下异常，系统报找不到名为“xxx-houtai1”的主机：

 1 java.net.UnknownHostException: xxx-houtai1: xxx-houtai1
         at java.net.InetAddress.getLocalHost(InetAddress.java:1353)
         at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
         at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
         at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4013)
         at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357)
         at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
         at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
         at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
         at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:277)
         at org.apache.catalina.core.StandardHost.install(StandardHost.java:832)
         at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:701)
         at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:432)
         at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
         at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349)
         at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
         at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)
         at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
         at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
         at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
         at org.apache.catalina.core.StandardService.start(StandardService.java:480)
         at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
         at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:597)
         at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
         at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)

2.问题解决

　　打开Linux上 /etc/hosts文件，在文件最后加入这句配置，重启服务即可

　　  172.xx.xxx.xxx localhost.localdomain xxx-houtai1

　　 172.xx.xxx.xxx  : 应用ip地址

　 　localhost.localdomain : 为域名,可以不加

　　 xxx-houtai1  :主机名称