log4j:ERROR Failed to rename
log4j.xml
<appender   name= "DailyRollingFileAppender "   class= "org.apache.log4j.DailyRollingFileAppender ">
    <param   name= "Append "   value= "true "   />
    <param   name= "File "   value= "E:/test "   />    
    <param   name= "DatePattern "   value= "yyyyMMdd '.log ' "   />
    <layout   class= "org.apache.log4j.PatternLayout ">
    <param   name= "ConversionPattern "   value= "[%-5p]%d{yyyy-MM-dd   HH:mm:ss.SSS}     %n%m%n%n "   />
    </layout>
  </appender>

第二天产生日志的时候报错:
log4j:ERROR   Failed   to   rename   [E:/test]   to   [E:/test20070313.log].




------解决方案--------------------
应该是你文件系统的权限的问题，而不是log4j的问题