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DEBUG > INFO > WARN > ERROR >FATAL
Log4J also allows multiple appender types such as CONSOLE or FILE or even SMTP.
Defaults
By default, SPIN will use the log4j configuration file located in /opt/spin/main/conf
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This lo4j configuration will log all WARN, ERROR, or FATAL level messages to Tomcat STDOUT.
Any SPIN messaging related classes will log at the INFO level, also to Tomcat STDOUT.