Log4j is not identifying ${catalina.home} in log4j.xml

Question

hi,
I am trying to print my debug statements in .log file. When i try the full path like
*<param name="File" value="*c:/Dbg/debug.log*" />* it is succsfully printing the file but if i give like
it is not printing *"${catalina.home}/Dbg/debug.log"* what is the error.
ThanQ
my log4j.xml is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
<log4j:configuration>
<appender name="debugfile"
          class="org.apache.log4j.RollingFileAppender">
          <param name="maxFileSize" value="100KB" />
          <param name="maxBackupIndex" value="5" />
          <param name="File" value="*${catalina.home}/Dbg/debug.log*" />
          <layout class="org.apache.log4j.PatternLayout">
               <param name="ConversionPattern"
                    value="%d{ABSOLUTE} %5p %c{1}:%L - %m%n" />
          </layout>
          <filter class="org.apache.log4j.varia.LevelRangeFilter">
               <param name="LevelMin" value="debug" />
               <param name="LevelMax" value="debug" />
          </filter>
     </appender>
<root>
          <priority value="debug"></priority>
          <appender-ref ref="debugfile" />
     </root>
</log4j:configuration>

Answer 1

No, you didn't replace the system property identifier by the value of the system property. Your XML looks like this:
<param name="File" value="${catalina.home}/Dbg/debug.log" />(I'm assuming you don't really have those asterisks in there, you were just trying to draw attention to it.) So after replacing the system property, it should look like this:<param name="File" value="D:\MQS\jboss As\Tomcat 5.0/Dbg/debug.log" />Here's another question for you to think about: are system property names case-sensitive or not? catalina.home or CATALINA.HOME?