Why put the log4j configuration file in the classpath if you are initializing it in an init servlet? Just put it alongside your web.xml file in
WEB-INF. Only put it in WEB-INF/classes if you want log4j to perform default initialization....and call it log4j.xml or log4j.properties otherwise default initialization won't find it (default initialization of log4j.xml was only added in log4j-.2.7, I believe).
Also, you are expecting to find the config file via an absolute file path. This is very bad practice unless you check for getRealPath("/") returning null and provide alternate loading of the config file via an InputStream. The servlet API provides this capability. Use it. Actulally, there is no reason whatsoever to use getRealPath("/") unless you are going to use configureAndWatch() because that doesn't take an InputStream.
In addition, you'd be wise to use a servlet context listener and do your log4j config in contextInitialized() and then clean up log4j in contextDestroyed() with LogManager.shutdown(). This guarantees only one call to either method during the entire lifecycle of the app. It is not guaranteed that an init() method of a servlet won't be called more than once. The container can destroy and re-initialize a servlet any time it wants.
Sorry, I'm not sure why this config wouldn't be working for you in 4.1.18 when it did in 4.1.12. But at least you can take some of the hints above and improve on your current log4j usage.
Jake
At 11:45 AM 12/25/2002 -0800, you wrote:
I am new to using log4j and am getting the standard error "log4j:ERROR No appenders could be found for category (Actions). log4j:ERROR Please initialize the log4j system properly." I don't know if this means that Tomcat, Struts, or the Application (Chiki) is not initialized properly. The manual has the following for Tomcat, and I don't know if I should immediately get into that. Could someone kick me to the right place to start? I did not have this problem with Tomcat 4.1.12, so I assume this is some difference in Tomcat 4.1.18. However, the error seems to be related to Struts actions, so I am not sure where to start. Thanks for any assistance, which I don't really expect, since I have asked this question before and have not gotten an answer.
package com.foo;
import org.apache.log4j.PropertyConfigurator;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.io.IOException;
public class Log4jInit extends HttpServlet {
public
void init() {
String prefix = getServletContext().getRealPath("/");
String file = getInitParameter("log4j-init-file");
// if the log4j-init-file is not set, then no point in trying
if(file != null) {
PropertyConfigurator.configure(prefix+file);
}
}
public
void doGet(HttpServletRequest req, HttpServletResponse res) {
}
}
Define the following servlet in the web.xml file for your web-application.
<servlet>
<servlet-name>log4j-init</servlet-name>
<servlet-class>com.foo.Log4jInit</servlet-class>
<init-param>
<param-name>log4j-init-file</param-name>
<param-value>WEB-INF/classes/log4j.lcf</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
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