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Message-ID: <a2d59f0d0706060642k4c4948d8l1d862f1d7134ed2e@mail.gmail.com>
Date: Wed, 6 Jun 2007 15:42:14 +0200
From: "Gregor Schneider" <rc46fi@googlemail.com>
To: "Tomcat Users List" <users@tomcat.apache.org>
Subject: Getting nuts with Tomcat 5.5 and log4j
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Hi guys,

I've setup Tomcat on my Debian Box so that all loging goes to
$CATALINA_HOME/logs/tomcat.log

I've placed the files log4j.(xml,dtd) int
$CATALINA_HOME/common/classes, and it runs like charm.

Now, I've added another logger which is supposed to log the output of
our apps only. That logger should be in place as a default logger for
all web-apps. The benefit is, that no web-app has to provide it's own
log4j.xml.

This is a snipped of the log4j.xml from $CATALINA_HOME/common/classes where

- the root-logger logs everything coming from Tomcat Engine

- CompassLogger logs everything coming from our applications:

  <!-- Tomcat Daily Rolling File Appender TRACE, DEBUG, INFO -->
  <appender name="TomcatDailyFileAppenderInfo"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
	<param name="file" value="${catalina.home}/logs/tomcat.log.INFO" />
...
  </appender>

  <!-- Tomcat Daily Rolling File Appender WARNING -->
  <appender name="TomcatDailyFileAppenderWarning"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
	<param name="file" value="${catalina.home}/logs/tomcat.log.WARN" />
...
  </appender>

  <!-- Tomcat Daily Rolling File Appender ERROR -->
  <appender name="TomcatDailyFileAppenderError"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
	<param name="file" value="${catalina.home}/logs/tomcat.log.ERROR" />
...
  </appender>

  <!-- COMPASS Tomcat Daily Rolling File Appender TRACE, DEBUG, INFO -->
  <appender name="CompassDailyFileAppenderInfo"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
	<param name="file" value="${catalina.home}/logs/compass.log.INFO" />
...
  </appender>

  <!-- COMPASS Tomcat Daily Rolling File Appender WARNING -->
  <appender name="CompassDailyFileAppenderWarning"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
	<param name="file" value="${catalina.home}/logs/compass.log.WARN" />
...
  </appender>

  <!-- COMPASS Tomcat Daily Rolling File Appender ERROR -->
  <appender name="CompassDailyFileAppenderError"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
	<param name="file" value="${catalina.home}/logs/compass.log.ERROR" />
...
  </appender>

  <root>
    <priority value="INFO" />
    <appender-ref ref="TomcatDailyFileAppenderInfo" />
    <appender-ref ref="TomcatDailyFileAppenderWarning" />
    <appender-ref ref="TomcatDailyFileAppenderError" />
  </root>

  <logger name="CompassLogger" additivity="false">
    <level value="WARNING" />
    <appender-ref ref="CompassDailyFileAppenderInfo" />
    <appender-ref ref="CompassDailyFileAppenderWarning" />
    <appender-ref ref="CompassDailyFileAppenderError" />
  </logger>
...
</log4j:configuration>

Well, this runs like charm.

However, now I'm gaving another web-app which is supposed to have it's
own log-file and should not use CompassLogger but create it's own
logger.

I've created the following file log4j.xml 8again a snippet since it's
quite some code) and put it into
$CATALINA_HOME/webapps/MyWebApp/WEB-INF/classes (together with
log4j.dtd):

 <!-- SSO Daily Rolling File Appender TRACE, DEBUG, INFO -->
  <appender name="SSODailyFileAppenderInfo"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
    <param name="file" value="${catalina.home}/logs/sso.log.INFO" />
...
  </appender>

  <!-- SSO Daily Rolling File Appender WARNING -->
  <appender name="SSODailyFileAppenderWarning"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
    <param name="file" value="${catalina.home}/logs/sso.log.WARN" />
...
  </appender>

  <!-- SSO Daily Rolling File Appender ERROR -->
  <appender name="SSODailyFileAppenderError"
class="org.apache.log4j.DailyRollingFileAppender">
    <param name="datePattern" value="'.'yyyy-MM-dd" />
    <param name="Append" value="true" />
    <param name="file" value="${catalina.home}/logs/sso.log.ERROR" />
...
  </appender>

  <logger name="SSOLogger" additivity="false">
    <level value="INFO" />
    <appender-ref ref="SSODailyFileAppenderInfo" />
    <appender-ref ref="SSODailyFileAppenderWarning" />
    <appender-ref ref="SSODailyFileAppenderError" />
  </logger>

Within my Servlet, I'm having the following peace of code to
initialize the logger:

    public void init(ServletConfig aConfig) throws ServletException {
    	super.init(aConfig);
    	DOMConfigurator.configure("log4j.xml");
    	ssoLogger = Logger.getLogger("SSOLogger");

However, when the servlet is started, I'm getting the following
Exception in catalina.out *sic*:

log4j:ERROR Could not parse file [log4j.xml].
java.io.FileNotFoundException:
/home/tomcat/packages/apache-tomcat-5.5.20/logs/log4j.xml (No such
file or directory)

I've read the log4j-docs, read all the Tomcat-docs about Tomcat &
log4j (which are not too helpful, I'm afraid), browsed through the
"complete log4j-manual - the one you'll have to buy), but nothing
could answer my questions:

1. Is it possible create a default logger with a
log4j.xml-configuration in $CATALINA_HOME/common/classes PLUS create
some application-specific loggers with a log4j.xml-configuration in
$CATALINA_HOME/webapps/MyWebApp/WEB-INF/classes?

2. If so, is it correct that I have need to define the root-logger
only in my default-logger-config (common/classes)?

3. Why is everybody writing that I have to drop my log4j.xml into
$CATALINA_HOME/webapps/MyWebApp/WEB-INF-classes, however, log4j is
searching for a file $CATALINA_HOME/ogs/log4j.xml ?

I know it's quite some log4j-stuff, and this is a Tomcat-mailinglist,
however, I guess this is a real-life-example referring to Tomcat AND
log4j, so hopefully somebody here can shed some light.

Any suggestions welcome!

Gregor
-- 
what's puzzlin' you, is the nature of my game
gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
gpgp-key available @ http://pgpkeys.pca.dfn.de:11371

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