log4j: Why aren't I seeing output in my log file?

[Dave Alvarado]

Hi,

I'm using Tomcat 6.0.24 and log4j 1.2.16. Nothing is appearing in my log4j logs as defined by my properties files and I was looking to get some insight as to why. Here is my log4j.properties, located in my war file's WEB-INF/classes directory ...

log4j.rootLogger=DEBUG, Appender1,Appender2

# Appender1 is set to be a ConsoleAppender.
log4j.appender.Appender1=org.apache.log4j.RollingFileAppender
log4j.appender.Appender1.File=/Users/davea/Tomcat/logs/log4j.log
log4j.appender.Appender2=org.apache.log4j.RollingFileAppender
log4j.appender.Appender2.File=/Users/davea/Tomcat/logs/log4j.log


# Appender2 uses PatternLayout.
log4j.appender.Appender1.layout=org.apache.log4j.PatternLayout
log4j.appender.Appender1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

log4j.appender.Appender2.layout=org.apache.log4j.PatternLayout
log4j.appender.Appender2.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

I'm creating the logger and using it in the code below. The System.err.println statement is printed in my catalina.out file, so I know the branch of code is being invoked ...

import org.apache.log4j.Logger;
...
	private static final Logger log = Logger.getLogger(HttpTransporter.class);
...
			System.err.println("evaluating response for uri " + uri.toString());
			log.debug("evaluating response for uri " + uri.toString());

Any help as to why nothing is appearing in my logs is appreciated, - Dave

[rajeev yadav]

Where have you kept your log4j.properties. Also you need to initiate log4j. General way to do it initialising in a servlet which is configured in web.xml. See below link

http://www.avajava.com/tutorials/lessons/how-do-i-initialize-log4j-in-a-web-application.html


Also remember to place log4j.properties right under classes folder in output dir.

[rajeev yadav]

You can log4j.properties at any location but you need to tell your app to load it from that location