hostname设置不对，导致logback出错从而spring起不来的问题

Logging system failed to initialize using configuration from 'classpath:log/logback.xml'java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.util.ContextUtil@253e7c0b - Failed to get local hostname java.net.UnknownHostExceptionat org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:161)at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:57)at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:47)at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114)at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:304)at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:272)at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:235)at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:208)at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:121)at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:68)at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:337)at org.springframework.boot.SpringApplication.run(SpringApplication.java:308)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175)at ltd.miku.misaka.server.App.main(App.java:55)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58)10:03:54.908 [main] WARN  org.springframework.boot.SpringApplication.callFinishedListener:91 - Error handling failed (no error message)10:03:54.917 [main] ERROR org.springframework.boot.SpringApplication.reportFailure:839 - Application startup failedjava.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.util.ContextUtil@253e7c0b - Failed to get local hostname java.net.UnknownHostExceptionat org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:311)at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:272)at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:235)at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:208)at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:121)at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:68)at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:337)at org.springframework.boot.SpringApplication.run(SpringApplication.java:308)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175)at ltd.miku.misaka.server.App.main(App.java:55)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58)Caused by: java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.util.ContextUtil@253e7c0b - Failed to get local hostname java.net.UnknownHostExceptionat org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:161)at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:57)at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:47)at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114)at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:304)... 21 common frames omitted

不完美解决方案：

echo "127.0.0.1   $HOSTNAME">>/etc/hosts

环境是centos6.5

参考文章：

http://blog.csdn.net/shirdrn/article/details/6562292