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From Georg Sauer-Limbach <>
Subject Re: Can't seem to get logging to work in Tomcat 5.5.9
Date Thu, 31 May 2007 21:59:07 GMT
Hi Rob,

check catalina.out, there should be some message of
log4j complaining if it has been loaded but cannot work.

You may also add -Dlog4.debug to the java command line,
this makes log4j output debug messages on stdout.

If you don't see any output of log4j, then I'd suggest
calling java with -verbose:class, this makes java
print information about every class it loads and from
which source it loaded it. Grep for log4j to see if it
is at all loaded.


Rob Tanner wrote:
> Hi,
> I was originally planning to move to Tomcat 6 but backed off for a
> number of reasons.  Now I have Tomcat 5.5.9 installed an working, except
> for logging (and one other problem that I might be able to resolve on my
> own if only I could get logging to work). 
> I have never configured Tomcat to log using log4j (Tomcat 4.x's built-in
> was sufficient).  Following the instructions on the website
> (,  I creating a
> file and placed it in common/classes -- the only change
> I made on the example on the webpage was to replace a variable with an
> absolute path:
> log4j.rootLogger=DEBUG, R
> log4j.appender.R=org.apache.log4j.RollingFileAppender
> log4j.appender.R.File=/var/apache/jakarta-tomcat-5.5.9/logs/tomcat.log
> log4j.appender.R.MaxFileSize=10MB
> log4j.appender.R.MaxBackupIndex=10
> log4j.appender.R.layout=org.apache.log4j.PatternLayout
> log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
> I then put log4j-1.2.7.jar and commons-logging-1.1.jar jarfiles in
> common/lib and started Tomcat. The instructions don't say anything about
> doing anything else and I've not done very much with log4j other than
> use it to enable syslog logging in various applications, but it's not
> working.
> Any ideas?
> Thanks,
> Rob

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