log4j and tomcat 6.x problem - not writing to the log files

[Srikanth Madasu]

I am planning to have two separate log files for different packages - one for app and other for daos.

I am using following log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
<log4j:configuration>
	<appender name="AppLogger"
		class="org.apache.log4j.RollingFileAppender">
		<param name="maxFileSize" value="100KB" />
		<param name="maxBackupIndex" value="5" />
		<param name="File" value="C:/logs/app.log" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="%d{ABSOLUTE} %5p %c{1}:%L - %m%n" />
		</layout>
	</appender>
	<appender name="DaoLogger"
		class="org.apache.log4j.RollingFileAppender">
		<param name="maxFileSize" value="100KB" />
		<param name="maxBackupIndex" value="5" />
		<param name="File" value="C:/logs/dao.log" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern" value="%d{ABSOLUTE} %5p %c{1}:%L - %m%n" />
		</layout>	
	</appender>

	<logger name="ex.com.app" >
        <appender-ref ref="AppLogger"/>
    </logger>

    <logger name="ex.com.dao" >
        <appender-ref ref="DaoLogger"/>
    </logger>

</log4j:configuration>

I am using following log4j.properties file

#app Logger
log4j.AppLogger=ALL, appfile

#dao logger
log4j.DaoLogger=ALL, daofile

#writing to app.log
log4j.appender.appfile=org.apache.log4j.RollingFileAppender
log4j.appender.appfile.maxFileSize=100KB
log4j.appender.appfile.maxBackupIndex=5
log4j.appender.appfile.File=app.log
log4j.appender.appfile.threshold=info
log4j.appender.appfile.layout=org.apache.log4j.PatternLayout
log4j.appender.appfile.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

#writing to dao.log
log4j.appender.daofile=org.apache.log4j.RollingFileAppender
log4j.appender.daofile.maxFileSize=100KB
log4j.appender.daofile.maxBackupIndex=5
log4j.appender.daofile.File=dao.log
log4j.appender.daofile.threshold=info
log4j.appender.daofile.layout=org.apache.log4j.PatternLayout
log4j.appender.daofile.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

And in my class in ex.com.app package I am using
private static Logger log = Logger.getLogger(LogonAction.class);

And in my class in ex.com.dao package I am using
private static Logger log = Logger.getLogger(LogonDAOImpl.class);

I am deploying the application on tomcat 6.x and I made sure that I have log4j.dtd, log4j.xml & log4j.prop file in the classpath WEB-Inf/classes/

It is creating the log files in the location I specified but it is never writing into these files.

Am I missing something or are there any configuration that are specific to tomcat? please help!!

thanks in advance...

[Srikanth Madasu]

I tried a sample java proj in eclipse sing same code, and it worked fine.

So I am guessing it has to do something with the tomcat configuration.

Did anyone successfully used log4j on tomcat server? please help!!!

[Martijn Verburg]

You don't need to have both log4j.properties and log4j.xml, you should just stick with one (log4.xml being preferred).

[Srikanth Madasu]

Thanks for your reply.. but that did not really make any difference

[Martijn Verburg]

I think you might be missing something from your xml configuration, here's a sanmple of what I use:

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">

  <!--
    ================================================
      A size based file rolling appender

      The following pattern layout is used
        level of the log request
        rightmost components of the logger name
        callers method name
        additional info such as data source name
        message itself
    ================================================
  -->
  <!-- All activities -->
  <appender name="all" class="org.jboss.logging.appender.RollingFileAppender">
    <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
    <param name="File" value="${jboss.server.home.dir}/log/server.log"/>
    <!--<param name="Threshold" value="INFO"/>-->
    <param name="Append" value="true"/>
    <param name="MaxFileSize" value="2MB"/>
    <param name="MaxBackupIndex" value="20"/>
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d{yyyyMMdd HH:mm:ss.SSS} %-5p [%t] %C{1}.%M(): %x %m%n"/>
    </layout>
  </appender>

  <!--
    ================================================
      Limit categories
    ================================================
  -->
  <!-- Limit the org.apache category to INFO as its DEBUG is verbose -->
  <category name="org.apache">
    <priority value="INFO"/>
  </category>

  <!--
    ================================================
      Setup the Root category
    ================================================
  -->
  <category name="org.jboss.serial">
    <priority value="INFO"/>
  </category>

  <root>
    <!-- set default logging level for all -->
    <priority value="INFO"/>
    <appender-ref ref="all"/>
  </root>

  </appender>

</log4j:configuration>

[Srikanth Madasu]

Thanks, Its now working. I used the following code. I am posting it so that it may be useful to other.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >

<log4j:configuration>
	<appender name="appAppender"
			  class="org.apache.log4j.RollingFileAppender">
		<param name="maxFileSize" value="100KB" />
		<param name="maxBackupIndex" value="2" />
		<param name="File" value="C:/logs/app.log" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern"
				   value="%d{ABSOLUTE} %5p %c{1}: %m%n " />
		</layout>
	</appender>

	<appender name="daoAppender"
			  class="org.apache.log4j.RollingFileAppender">
		<param name="maxFileSize" value="100KB" />
		<param name="maxBackupIndex" value="2" />
		<param name="File" value="C:/logs/dao.log" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern"
				   value="%d{ABSOLUTE} %5p %c{1}: %m%n " />
		</layout>
	</appender>

    <category name="com.ex.actions">  
    	<priority value="DEBUG"/>  
    	<appender-ref ref="appAppender"/>    
    </category> 

    <category name="com.ex.DAOImpl">  
    	<priority value="DEBUG"/>  
    	<appender-ref ref="daoAppender"/>    
    </category> 

	<root>
		<!--  
		<appender-ref ref="appAppender" />
		<appender-ref ref="daoAppender" />
		--> 
	</root>
</log4j:configuration>

Thanks a bunch for your help!!!

[Martijn Verburg]

Glad you got it working!