java.net.UnknownHostException

服务器上tomcat启动时，报如下错误：

 

15:28:06,605 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
15:28:06,607 |-ERROR in ch.qos.logback.core.util.ContextUtil@715ea69f - Failed to get local hostname java.net.UnknownHostException: TW-LG-AICLOUD-APP1: TW-LG-AICLOUD-APP1
        at java.net.UnknownHostException: TW-LG-AICLOUD-APP1: TW-LG-AICLOUD-APP1
        at      at java.net.InetAddress.getLocalHost(InetAddress.java:1354)
        at      at ch.qos.logback.core.util.ContextUtil.getLocalHostName(ContextUtil.java:32)
        at      at ch.qos.logback.core.util.ContextUtil.addHostNameAsProperty(ContextUtil.java:41)
        at      at ch.qos.logback.classic.joran.action.ConfigurationAction.begin(ConfigurationAction.java:56)
        at      at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Interpreter.java:276)
        at      at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:148)
        at      at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:130)
        at      at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:50)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:157)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:143)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:106)
        at      at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:56)
        at      at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75)
        at      at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148)
        at      at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85)
        at      at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:55)

 

 

按网上的说法，修改/etc/hosts文件就可以了，我把/etc/hosts文件改为如下：

 

127.0.0.1  TW-LG-AICLOUD-APP1  localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.250. TW-LG-AICLOUD-APP1

 

同时，/etc/sysconfig/network中的HOSTNAME的值也为TW-LG-AICLOUD-APP1，修改完后，重启网卡，再重启tomcat

 

服务，发现还是报错。看了下别的服务器，别的服务器也是这样配置的。后面一想，会不会是TW-LG-

 

AICLOUD-APP1太长、或者有分隔符，所以换了个简短的主机名，修改为简单的主机名后，还是不行。

 

后面试了下用hostname myhostname修改主机名，重启tomcat，发现生效了。

 

因服务器不能随便重启，估计是因为修改/etc/sysconfig/network和/etc/hosts文件，需要重启机器才能生效。

 

而直接用命令修改，是不需要重启服务器的。但是重启后，会以配置文件的为准。