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 
 2         at java.net.InetAddress.getLocalHost(InetAddress.java:1353) 
 3         at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029) 
 4         at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862) 
 5         at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4013) 
 6         at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357)
 7         at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823) 
 8         at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807) 
 9         at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595) 
10         at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:277) 
11         at org.apache.catalina.core.StandardHost.install(StandardHost.java:832) 
12         at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:701) 
13         at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:432) 
14         at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983) 
15         at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349) 
16         at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) 
17         at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091) 
18         at org.apache.catalina.core.StandardHost.start(StandardHost.java:789) 
19         at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083) 
20         at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478) 
21         at org.apache.catalina.core.StandardService.start(StandardService.java:480) 
22         at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313) 
23         at org.apache.catalina.startup.Catalina.start(Catalina.java:556) 
24         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
25         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
26         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
27         at java.lang.reflect.Method.invoke(Method.java:597) 
28         at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287) 
29         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

　　 1 172.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