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From David Jencks <>
Subject Re: Concepts behind log file per WAR using log4j
Date Tue, 21 Apr 2009 16:10:26 GMT

On Apr 21, 2009, at 8:52 AM, Villemos, Gert wrote:

> I’m trying to understand how to setup logging using log4j with  
> Geronimo. Found the article

>  but I miss an explanation of the concepts behind the logging.  
> Likely the problem I have with implementing the logging following  
> the article are due to this missing understanding. Before bothering  
> anyone with my faulty source code I would therefore like to know  
> whether I have understood the concepts correctly;
> 1. Each deployed WAR can maintain separate log file(s), by including  
> a ‘’ file in the WAR and a definition of where to  
> unpack it in the ‘geronimo-web.xml’ deployment file.

You also need a geronimo plan for the war with an  
ApplicationLog4jConfigurationGBean gbean to tell log4j about the  
special configuration for the war's logging.

> 2. The ‘{GERONIMO_HOME}/var/log/’ file  
> defines the log4j setup for the Geronimo server. When deploying WARs  
> with their own files I do NOT have to change this  
> file to make them work, the GBean ‘DirectoryLog4jConfiguration’ will  
> manage this for me.

yes.  If you don't do anything your app's logging will also end up in  
this server log file.  You only need to follow the doc instructions if  
you want your app's logging to go to a separate file from the normal  
server logging.

> 3. The log files can be viewed from the administration console  
> through the ‘server log’ portlet, and the ‘Filter Criteria’ drop  
> down box will contain each registered log file.

I don't know if you can look at other log files using the console log  

hope this helps
david jencks

> Thanks,
> Gert.
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