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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 \[http://tomcat.apache.org/tomcat-5.0-doc/config/logger.html Logger configuration reference\].

• Wiki Markup
  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 \[http://tomcat.apache.org/tomcat-5.5-doc/logging.html\] \\

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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