Verify that it is configured before you attempt to use a Logger.
Added -Dlog4j.debug to the command line to give you more info.
On 3/14/06, red phoenix <[EMAIL PROTECTED]> wrote:
> I have some file like follows:
> C:\tomcat5\webapps\ROOT\WEB-INF\web.xml
> C:\tomcat5\webapps\ROOT\WEB-INF\conf\log4j.properties
> C:\tomcat5\webapps\ROOT\WEB-INF\classes\test\LogServlet.class
> C:\tomcat5\webapps\ROOT\WEB-INF\classes\abc\test.class
>
> and I use servlet to initial log4j,like follows:
>
> /*LogServlet.java*/
> package test;
> import javax.servlet.*;
> import javax.servlet.http.*;
> import org.apache.log4j.PropertyConfigurator;
> public class LogServlet extends HttpServlet{
> public void init() throws ServletException {
> String prefix = getServletContext().getRealPath("/");
> String file =
> getServletConfig().getInitParameter("log4j-config-file");
> if(file != null)
> PropertyConfigurator.configure(prefix + file);
> }
> public void doPost(HttpServletRequest request, HttpServletResponse
> response) throws ServletException, IOException{}
> }
>
> /*web.xml*/
> .......
> <servlet>
> <display-name>LogServlet</display-name>
> <servlet-name>LogServlet</servlet-name>
> <servlet-class>
> test.LogServlet
> </servlet-class>
> <init-param>
> <param-name>log4j-config-file</param-name>
> <param-value>
> /WEB-INF/conf/log4j.properties
> </param-value>
> </init-param>
> <load-on-startup>1</load-on-startup>
> </servlet>
>
> /*log4j.properties*/
> log4j.logger.A1=INFO, A1
> log4j.appender.A1=org.apache.log4j.ConsoleAppender
> log4j.appender.A1.layout=org.apache.log4j.PatternLayout
> log4j.appender.A1.layout.ConversionPattern=%m%n
>
> I find LogServlet execute successful,and then I write a class to write
> log,like follows:
>
> package abc;
> import org.apache.log4j.Logger;
> public class test{
> private static Logger log;
> public static void main(String args[]){
> Logger log=Logger.getLogger("A1");
> log.error("test");
> }
>
> When I run test.class,I got error:
>
> log4j:WARN No appenders could be found for logger (A1).
> log4j:WARN Please initialize the log4j system properly.
>
> Why raise above error? I am puzzled with it.
> Thanks in advance.
>
>
--
James Stauffer
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