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See also the following mailing list discussions:

• A log4j example
• Logging Configuration
• Example with JSVC and running on port 80.
• Tomcat and Log4j Configuration (and Velocity), addressing and solving the bootstrap commons-logging.jar problem
  

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System.out and System.err both print to catalina.out. But you can suppress this via the swallowOutput property and sent to different log files. catalina.out does not rotate. But it should not be an issue because nothing should be printing to standard output since you are using a logging package, right? thread about rotation of catalina.out

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