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From Peter DePasquale <peter.depasqu...@gmail.com>
Subject Re: Simple (?) question about logging behavior (additive issue?)
Date Tue, 26 Mar 2013 14:40:11 GMT
I'm still stumped on this issue and would welcome any thoughts or feedback.
In fact, I've tried to replicate my steps in my real application and
obtained similar results. Even reducing the number of loggers to just the
base package in my 'real' app results in empty files.


On Mon, Mar 25, 2013 at 1:25 PM, Peter DePasquale <
peter.depasquale@gmail.com> wrote:

> Hi,
>
> I've been trying to track down some failure to log in my Tomcat
> application. In doing so, I've written a small Test class in which I log
> .entry(), .exit(), .trace(), and error() events (source code is below).
>
> I've also copied the log4j2.xml file and the output files created by the
> logging system (beta4). What I don't understand is why all TRACE and ERROR
> messages end up only in the trace file, and the error file is empty.
>
> My understanding is that the trace and error messages would be logged in
> the trace file. However, it was my intention to log error events in the
> error file created by the root logger.  Why are error events not being
> passed to the root, or why is root not writing them out? If additivity is
> implicitly enabled, should not all the events be passed to the root logger,
> and that root would only process those error events passed to it?
>
> log4j2.xml
> ========
> <?xml version="1.0" encoding="UTF-8"?>
> <configuration status="debug">
> <properties>
>  <property
> name="errorLog">${sys:catalina.base}/logs/comtor-log-errors.txt</property>
> <property
> name="traceLog">${sys:catalina.base}/logs/comtor-log-trace.txt</property>
>  </properties>
>
> <appenders>
> <File name="errorFile" fileName="${errorLog}" suppressExceptions="false"
> append="false">
>  <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p %C.%M [%t] - %msg%n"/>
> </File>
>
> <File name="traceFile" fileName="${traceLog}" suppressExceptions="false"
> append="false">
> <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p %C.%M [%t] - %msg%n"/>
>  </File>
> </appenders>
>  <loggers>
>  <root level="error">
> <appender-ref ref="errorFile"/>
> </root>
>
> <logger name="Test" level="trace">
> <appender-ref ref="traceFile"/>
>  </logger>
>
> </loggers>
> </configuration>
>
> Test.java
> =======
> import java.io.*;
> import javax.servlet.*;
> import javax.servlet.http.*;
>
> import org.apache.logging.log4j.Logger;
> import org.apache.logging.log4j.LogManager;
>
> public class Test extends HttpServlet {
> private static Logger logger = LogManager.getLogger(Test.class.getName());
>
> /**
>  * Called by the server (via the service method) to allow a servlet to
> handle a GET request.
>  * See {@link
> http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServlet.html#doGet(
>  *       javax.servlet.http.HttpServletRequest,
> javax.servlet.http.HttpServletResponse)}
>  */
> public void doGet(HttpServletRequest request, HttpServletResponse response)
>  throws ServletException, IOException {
> logger.entry();
> logger.error("Error message.");
>  logger.trace("Trace message.");
> logger.exit();
> }
>  }
>
> comtor-log-trace.txt
> ==============
> $ more comtor-log-trace.txt
> 2013-03-25 13:23:11 TRACE Test.doGet [http-bio-80-exec-55] -  entry
> 2013-03-25 13:23:11 ERROR Test.doGet [http-bio-80-exec-55] - Error message.
> 2013-03-25 13:23:11 TRACE Test.doGet [http-bio-80-exec-55] - Trace message.
> 2013-03-25 13:23:11 TRACE Test.doGet [http-bio-80-exec-55] -  exit
>
> comtor-log-error.txt
> ==============
> <empty file>
>
> --
> Peter J. DePasquale, Ph.D.
> Department of Computer Science
> The College of New Jersey
> (e) depasqua [at] tcnj [dot] edu
> (p) 609-771-2806
> (f) 609-637-5190
> (o) Holman Hall - Room 238
> (l) Holman Hall - Room 255
>



-- 
Peter J. DePasquale, Ph.D.
Department of Computer Science
The College of New Jersey
(e) depasqua [at] tcnj [dot] edu
(p) 609-771-2806
(f) 609-637-5190
(o) Holman Hall - Room 238
(l) Holman Hall - Room 255

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