今天将项目部署到Centos 6.3 x64上面的tomcat 7.0.54，访问链接出现了404错误。后来查看了/usr/local/apache-tomcat-7.0.54/logs/catalina.out 文件，出现了Error listenerStart 。
org.apache.catalina.core.StandardContext startInternal SEVERE: Error listenerStart
2014-06-13 14:30:20 [localhost-startStop-1] INFO [ HibernateTransactionManager ] - Using DataSource [org.apache.commons.dbcp.BasicDataSource@247973e4] of Hibernate SessionFactory for HibernateTransactionManager 2014-06-13 14:30:21 [localhost-startStop-1] INFO [ ContextLoader ] - Root WebApplicationContext: initialization completed in 7903 ms Jun 13, 2014 2:30:21 PM org.apache.catalina.core.StandardContext startInternal SEVERE: Error listenerStart Jun 13, 2014 2:30:21 PM org.apache.catalina.core.StandardContext startInternal SEVERE: Context [/adver] startup failed due to previous errors Jun 13, 2014 2:30:21 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc SEVERE: The web application [/adver] registered the JDBC driver [org.postgresql.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. Jun 13, 2014 2:30:21 PM org.apache.catalina.startup.HostConfig deployWAR INFO: Deployment of web application archive /usr/local/apache-tomcat-7.0.54/webapps/adver.war has finished in 20,703 ms
再去查看/usr/local/apache-tomcat-7.0.54/logs/localhost.2014-06-13.log 文件，
Jun 13, 2014 2:33:35 PM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
Jun 13, 2014 2:33:35 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Jun 13, 2014 2:33:43 PM org.apache.catalina.core.ApplicationContext log
INFO: Set web app root system property: 'webapp.root' = [/usr/local/apache-tomcat-7.0.54/webapps/adver/]
Jun 13, 2014 2:33:43 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Logback from [classpath:dev/logback.xml]
Jun 13, 2014 2:33:43 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class ch.qos.logback.ext.spring.web.LogbackConfigListener
java.lang.IllegalArgumentException: Invalid 'logbackConfigLocation' parameter: class path resource [dev/logback.xml] cannot be resolved to URL because it does not exist
at ch.qos.logback.ext.spring.web.WebLogbackConfigurer.initLogging(WebLogbackConfigurer.java:144)
at ch.qos.logback.ext.spring.web.LogbackConfigListener.contextInitialized(LogbackConfigListener.java:54)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1083)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1880)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
Jun 13, 2014 2:33:44 PM org.apache.catalina.core.ApplicationContext log
INFO: Shutting down Logback
Jun 13, 2014 2:33:44 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
由此日志文件可以知道，在web.xml 初始化logback监听器的的时候找不到classpath:dev/logback.xml。
后来去/usr/local/apache-tomcat-7.0.54/webapps/adver/WEB-INF/classes/ 看了，也真的是下面没有dev/logback.xml文件夹。明明在开发的时候，在tomcat里面也是有的。 但是发布的时候，就没有。
找到原因：是因为用maven打包的，maven并没有将dev/logback.xml放到WEB-INF/classes里，而是直接将logbak.xml放在WEB-INF/classes。