tomcat and log4j

http://tomcat.apache.org/tomcat-6.0-doc/logging.html
http://wiki.apache.org/logging-log4j/Log4jXmlFormat

1. Create a file called log4j.xml or log4j.properties and save it into $CATALINA_HOME/lib
2. Download Log4J (v1.2 or later) and place the log4j jar in $CATALINA_HOME/lib
3. Download the additional logging components. See the extras components documentation for details - http://tomcat.apache.org/tomcat-6.0-doc/extras.html - (http://www.sai.msu.su/apache/tomcat/tomcat-6/v6.0.20/bin/extras/tomcat-juli.jar,
4. http://www.sai.msu.su/apache/tomcat/tomcat-6/v6.0.20/bin/extras/tomcat-juli-adapters.jar)
5. Replace $CATALINA_HOME/bin/tomcat-juli.jar with extras/tomcat-juli.jar.
6. Place extras/tomcat-juli-adapters.jar in $CATALINA_HOME/lib.
7. Start Tomcat

log4j.xml


log4j.properties

#log4j.rootLogger=debug, stdout, R, E

log4j.rootLogger=info, stdout, R, E



log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.target=System.out

log4j.appender.stdout.encoding=UTF-8

log4j.appender.stdout.MaxBackupIndex=10

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%d %-5p [%c] - %m%n



log4j.appender.R=org.apache.log4j.RollingFileAppender

log4j.appender.R.File=${catalina.home}/logs/tomcat.log

log4j.appender.R.encoding=UTF-8

log4j.appender.R.MaxFileSize=20MB

log4j.appender.R.MaxBackupIndex=50

#log4j.appender.R.appender=true

log4j.appender.R.layout=org.apache.log4j.PatternLayout

log4j.appender.R.layout.ConversionPattern=%d %-5p [%t] [%c{1}] - %m%n



log4j.appender.E=org.apache.log4j.RollingFileAppender

log4j.appender.E.File=${catalina.home}/logs/error.log

log4j.appender.E.encoding=UTF-8

log4j.appender.E.Threshold = error

log4j.appender.E.MaxFileSize=10MB

log4j.appender.E.MaxBackupIndex=10

#log4j.appender.E.appender=true

log4j.appender.E.layout=org.apache.log4j.PatternLayout

log4j.appender.E.layout.ConversionPattern=%d %-5p [%t] [%c{1}] - %m%n



log4j.logger.org.apache.catalina=info, R

#log4j.logger.org.apache.catalina.core=DEBUG, R

#log4j.logger.org.apache.catalina.session=DEBUG, R

Tomcat 6 defines loggers by Engine and Host names. For example, for a default Catalina localhost log.

log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=DEBUG, R

Note that there are known issues with using this naming convention (with square brackets) in log4j XML based configuration files, so we recommend you use a properties file as described until a future version of log4j allows this convention.