在tomcat5.0中发布失败

  发布时出现如下错误：
  log4j:WARN No appenders could be found for logger (org.apache.commons.digester.Digester).
log4j:WARN Please initialize the log4j system properly.
2008-11-17 16:20:06 org.apache.catalina.core.StandardContext start
严重: Error listenerStart
2008-11-17 16:20:06 org.apache.catalina.core.StandardContext start
严重: Context startup failed due to previous errors
2008-11-17 16:20:06 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
在各个搜索网站中都进行过搜索没得到具体解决方案 
jdk为1.6 、tomcat5.0、开发环境eclipse