Monitoring Logs

Logging is one of the most important monitoring tools of a production server. A properly configured logging system is vital for identifying errors, security threats, and usage patterns. WSO2 ML uses a log4j based logging mechanism through the Apache Commons Logging facade library. The log4j.properties file, which governs how logging is performed by the server, is in the <ML_HOME>/repository/conf/ directory. In general, you should not modify log4j.properties directly. Instead, you set up and modify logging using the ML management console. The settings in the management console override the settings in log4j.properties.

A logger is used to log messages for a specific system or application component. Loggers are normally named using a hierarchical, dot-separated namespace and have a “child-parent” relationship. For example, the logger named "root.sv" is a parent of the logger named "root.sv.sf" and a child of “root.”

The following topics provide more information about logging:

• Setting up Logging
• Application Logs
• System Logs