Here is an example of a configuration which would write all the logs to a file and once a size limit has been reached it will create a history file for the logs in a folder. So let us see the xml configuration then:
<Configuration status="DEBUG" monitorInterval="30"> <Appenders> <RollingRandomAccessFile name="RollingRandomAccessFile" fileName="${sys:catalina.home}/logs/tomcat.log" filePattern="${sys:catalina.home}/logs/$${date:yyyy-MM}/tomcat-%d{MM-dd-yyyy}-%i.log" immediateFlush="true" append="true" ignoreExceptions="false"> <PatternLayout> <Pattern>%d %-5p [%t] (%F:%L) - %m%n</Pattern> </PatternLayout> <Policies> <TimeBasedTriggeringPolicy /> <SizeBasedTriggeringPolicy size="15MB"/> </Policies> </RollingRandomAccessFile> </Appenders> <Loggers> <Root level="DEBUG" includeLocation="false"> <AppenderRef ref="RollingRandomAccessFile"/> </Root> </Loggers> </Configuration>
So the above configuration will create a tomcat.log file in the logs folder of the tomcat installation. And once the size of the file has reached 15mb it was create a history file. The history file will be created in the logs folder. In logs folder a subfolder for the month will be created like 2015-10. in each subfolder a file will be created like tomcat-10-12-2015-1.log.
The message can be configured with a Pattern.
The level of logging would be DEBUG.
And the monitorInterval=”30″ means that this configuration will be monitored every 30 seconds for changes.