tomcat log4j

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simonC - 31 Jul 2007 09:51 GMT

I use log4j for logging in my java web application. I use Tomcat as a
servlet container. The problem is that both the output of Tomcat
logging and my web application logging is send to stdout and the
output becomes very messy.

I would like that the loging of tomcat would not be output to stdout.
So that in stdout i would have only logs of my web application.

Hou can I set up Tomcat to achive that?

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Lew - 31 Jul 2007 12:12 GMT

> I use log4j for logging in my java web application. I use Tomcat as a
> servlet container. The problem is that both the output of Tomcat
[quoted text clipped - 5 lines]
>
> Hou can I set up Tomcat to achive that?

Set up a log4j.properties file that directs logging output where you want it
to go.

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Lew

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Roedy Green - 31 Jul 2007 13:54 GMT

>Set up a log4j.properties file that directs logging output where you want it
>to go.

It will have a line in it something like this:
log4j.appender.A.File=a.log

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Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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Mark Jeffcoat - 31 Jul 2007 20:58 GMT

>> I use log4j for logging in my java web application. I use Tomcat as a
>> servlet container. The problem is that both the output of Tomcat
[quoted text clipped - 8 lines]
> Set up a log4j.properties file that directs logging output where you
> want it to go.

Specifically, to get a handle on what Tomcat sends to
stdout, you need to tell log4j what to do with org.apache.catalina
log messages. E.g.,

<log4j_fragment>
<appender name="tomcat_log" class="org.apache.log4j.RollingFileAppender">
[configure this appender...]
</appender>

<logger name="org.apache.catalina">
<level value="info" />
<appender-ref ref="tomcat_log" />
</logger>
</log4j_fragment>

(I use log4j.xml instead of log4j.properties, since log4j's
configuration is so thoroughly hierarchal. Just a minor matter
of taste; if you have an existing log4j.properties, it should
be simple enough to translate this example into that format.)

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Mark Jeffcoat
Austin, TX

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tomcat log4j

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