![]() ![]() You may use these streams for elementary logging if you wish, but a more robust approach such as commons-logging or Log4J is recommended for production applications. In addition, Tomcat does not swallow the System.out and System.err JVM output streams. To additionally log information about requests going to the web application, "Valves" can be configured in the server.xml file, as described in detail here. Web applications can get logging service by using the Servlet API logging (which not recommended), the JUL interface (which ultimately goes to JULI) or any other preferred interface for which they furnish the jar files and the appropriate configuration (see the respective descriptions for Log4J, SLF4J, logback or Apache Commons Logging for example). This Tomcat logging infrastructure is called JULI, and one can still distinguish its Apache Commons Logging heritage, but the complex configuration has been edited out and the package name changed. The Tomcat startup script configures the JVM to use a web-application-aware implementation of the JUL LogManager. In Tomcat 7 (and also 6), the logging code is based on a set of classes interacting with the API (JUL), which comes with Java since version 1.4.Read the Commons-Logging documentation if you'd like to know how to better use and configure Tomcat's internal logging. Starting with Tomcat 5.5, Logger was removed and Apache Commons-Logging Log is used everywhere in Tomcat.Prior to Tomcat 5.5, Tomcat provided a Logger element that you could configure and extend according to your needs.Tomcat provides a much richer implementation than required by the Spec, as follows: The Servlet Specification requires Servlet Containers like Tomcat to provide at least a rudimentary implementation of the ServletContext#log method. Since java.logging is the default commons-logging implementation in Tomcat, why is it not working in my Linux distribution?Īnswers Does Tomcat have built-in logging capabilities, and if so how do I use them?.How do I customize the location of the tomcat logging.properties file?.Where are the logs when running Tomcat as a Windows service?. ![]()
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