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Comment: Added Logging Request Example XML

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  • Wiki Markup
    Prior to Tomcat 5.5, Tomcat provided a Logger element that you could configure and extend according to your needs. If you are using a Tomcat version previous to Tomcat 5.5, make sure to read the \[http://tomcat.apache.org/tomcat-5.0-doc/config/logger.html Logger configuration reference\].
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    Starting with Tomcat 5.5, Logger was removed and \[http://jakarta.apache.org/commons/logging Jakarta Commons-Logging\] {{Log}} is used everywhere in Tomcat. Read the Commons-Logging documentation if you'd like to know how to better use and configure Tomcat's internal logging. See also \[http://tomcat.apache.org/tomcat-5.5-doc/logging.html\]
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    To enable request logging similar to the Apache HTTP server, you may include the following line in the server.xml file, in the <Engine> tag:
          <Valve className="org.apache.catalina.valves.AccessLogValve"
                     directory="logs"  prefix="localhost_access_log." suffix=".log"
                     pattern="common" resolveHosts="false"/>
  This will produce a log file for each day,  such as  logs/localhost_access_log.2008-03-10.log, containing the files requested, IP address of the requester, and similar information.
    128.34.123.121 - - \[10/Mar/2008:15:55:57 -0500\] "GET /upload/ClickPoints.jsp HTTP/1.1" 200 2725
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Wiki Markup
In addition, Tomcat does not swallow the System.out and System.err JVM output streams. You may use these streams for elementary logging if you wish, but a more robust approach such as commons-logging or \[http://logging.apache.org/log4j Log4J\] is recommended for production applications.

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