Follow me

Monday, September 10, 2012

How To Add Log4J For Logging In Tomcat [For grails application]

Purpose

The purpose of this document is to explain you the steps to enable the log4j logging in  apache  tomcat as you may know that tomcat used system logging API i.e. java.util.logging for its internal logging.

In one of my project I came across such scenario where I need to implement the log4j logger for tomcat logs as well as application [grails ] log.

So  below are the steps we perform to set up log4j logging on tomcat 7 for grails 1.3.7 application.

1) Move existing  tomcat conf/logging.properties to some other name

        mv logging.properties logging.properties-back

2) Download Tomcat juli adapters library to  tomcat/lib/

     wget http://mirror.sdunix.com/apache/tomcat/tomcat-7/v7.0.28/bin/extras/tomcat-juli-adapters.jar

3)  Download Tomcat juli library to tomcat/lib/

wget http://mirror.sdunix.com/apache/tomcat/tomcat-7/v7.0.28/bin/extras/tomcat-juli.jar

4)  To make log4j work with grails app using tomcat-juli.jar we need
org\apache\juli\logging\UserDataHelper.java  which is not available in extra/ tomcat-juli.jar [but available in default tomcat jar]  so we make a patch called tomcat-log4j-patch.jar. contain UserDataHelper.class [NOT UPLOADED] . Copy this jar in tomcat lib folder

5) Copy  log4j.jar in tomcat lib folder

6) Open the catalina.sh and find juli LogManager config section. In else part add the log4j.xml path

 #Set juli LogManager config file if it is present and an override has not been issued
 if [ -z "$LOGGING_CONFIG" ]; thenif [ -r "$CATALINA_BASE"/conf/logging.properties ]; then
 LOGGING_CONFIG="-Djava.util.logging.config.file=$CATALINA_BASE/conf/logging.properties"
 else
 LOGGING_CONFIG="-Dlog4j.configuration=file://$CATALINA_BASE/lib/log4j.xml" fi

7) Restart the server

No comments:

Post a Comment