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From "Jeffrey Janner" <>
Subject RE: Log4j
Date Tue, 22 Sep 2009 15:00:25 GMT
I had a similar problem with log4j.
We host our webapp for various customers, an instance (host) per
customer, therefore the same code for each customer.  I tried sharing
log4j.jar in shared/lib, but found all customer loading into the same
log file - very confusing.
My solution was to put log4j.jar in WEB-INF/lib of each instance, along
with individual files and setting different file paths
in the properties files.  Only solution I could find.

-----Original Message-----
From: Antonio Petrelli [] 
Sent: Tuesday, September 22, 2009 6:02 AM
To: Tomcat Users List
Subject: Re: Log4j

2009/9/22 Nishant Chandra <>:
> I want to use Log4j and log from different web apps to one directory -
> tomcat_home/output/logs/{webapp_context}_service.log
> What should be the configuration in
> I am currently using
> log4j.appender.xml.file=${catalina.base}/output/logs/service.log
> What I want is to append app_context in the file name.

IIRC, there is no way to obtain the application context path as an
environment variable.
You should configure Log4j using its APIs, using a
Probably the best way is to load the "" file and
modify only the property that refers to the path of the file, then
configure Log4j.


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