Where to place log4j.xml

log4j

How can we specify were log4j has to look at when trying to find its xml configuration file ?

It seems that by default, log4j looks into the root of a class folder, I can say that using the debug log4j functionality and running my application from the IDE.

However, I don't have any class folder in my jar anymore. And the log4j.xml file is at the root of the jar.

I have already tried to set the option -Dlog4j.configuration=log4j.xml but it doesn't work.

Here is the global structure of my application at the moment :

com
lib
meta-inf
log4j.xml

Best Answer

It finds the log4j.xml using the CLASSPATH. If log4j doesn't find any config file, it will send an error to the console. If you don't see any such error then it is likely that it is finding a config file which may not be the one you are editing. There is a command-line option to force Log4J to report the path of the config file it is using.

From http://wiki.apache.org/logging-log4j/Log4jConfigurationHelp

If you run with "-Dlog4j.debug" then log4j will print out info to standard output telling how it is trying to configure itself. Looking through that will tell you where it is looking for the config file.

Related Solutions

Loading Log4j.xml from outside fo the war

Remember to add "file://" in front of the path, or else it will search inside the webapp folder.

The following example works for me.

<web-app>
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>file://${MY_ENV_VAR}log4j.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
</web-app>

Java – Log4j.xml throw file not found in Java EE application

configure web.xml file like this.

   <!-- these are at the top of the xml configuration file -->
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>WEB-INF/conf/log4j.xml</param-value>
    </context-param>

    <context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>api.root</param-value>
    </context-param> 

    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- ... -->

This may help you : http://forum.springsource.org/showthread.php?30800-SpringMVC-XML-Log4j-Logging-not-functioning

Best Answer

Related Solutions

Loading Log4j.xml from outside fo the war

Java – Log4j.xml throw file not found in Java EE application

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