log4j fichier et logging pas fait

Hello,

J'aimerais savoir pourquoi d'après mon fichier de configuration log4j.xml le fichier de log n'est pas créer au démarrage du server
Code:
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<?xml version="1.0" encoding="UTF-8"?>
 
      <!--
 
            * Licensed to the Apache Software Foundation (ASF) under one or more *
 
            contributor license agreements. See the NOTICE file distributed with *
 
            this work for additional information regarding copyright ownership. *
 
            The ASF licenses this file to You under the Apache License, Version
 
            2.0 * (the "License"); you may not use this file except in compliance
 
            with * the License. You may obtain a copy of the License at * *
 
            http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by
 
            applicable law or agreed to in writing, software * distributed under
 
            the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES
 
            OR CONDITIONS OF ANY KIND, either express or implied. * See the
 
            License for the specific language governing permissions and *
 
            limitations under the License.
 
      -->
 
 
 
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
 
<log4j:configuration>
 
      <appender name="logfile" class="org.apache.log4j.RollingFileAppender">
 
            <param name="MaxFileSize" value="10MB" />
 
            <param name="MaxBackupIndex" value="10" />
 
            <param name="File" value="c:/arpa_log" />
 
            <param name="Append" value="true" />
 
            <param name="Encoding" value="UTF-8" />
 
            <layout class="org.apache.log4j.PatternLayout">
 
                  <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p - %c:%L - %m%n" />
 
                  <!--
 
                        %d{...} date pattern %p priority %m log message %n newline -5 fill
 
                        with spaces (5) For more options see class
 
                        org.apache.log4j.PatternLayout.
 
                  -->
 
            </layout>
 
      </appender>
 
      <appender name="console" class="org.apache.log4j.ConsoleAppender">
 
            <layout class="org.apache.log4j.PatternLayout">
 
                  <param name="ConversionPattern" value="%d{HH:mm:ss} %-5p - %c{1}:%L - %m%n" />
 
            </layout>
 
      </appender>
 
      <category name="com.ibm.arpa" additivity="false">
 
            <priority value="DEBUG" />
 
            <appender-ref ref="console" />
 
            <appender-ref ref="logfile" />
 
      </category>
 
      <!--
 
            <category name="com.icefaces" additivity="false"> <priority
 
            value="ALL" /> <appender-ref ref="console" /> <appender-ref
 
            ref="logfile" /> </category> <category name="com.icesoft"
 
            additivity="false"> <priority value="ALL" /> <appender-ref
 
            ref="console" /> <appender-ref ref="logfile" /> </category>
 
      -->
 
 
 
      <!--
 
            <category name="ch.btc.datec.yamina.wf.step" additivity="false">
 
            <priority value="debug" /> <appender-ref ref="console" />
 
            <appender-ref ref="logfile" /> </category> <category
 
            name="ch.btc.datec.yamina.xml2jsf" additivity="false"> <priority
 
            value="debug" /> <appender-ref ref="console" /> <appender-ref
 
            ref="logfile" /> </category>
 
      -->
 
      <root>
 
            <priority value="warn" />
 
            <appender-ref ref="console" />
 
            <appender-ref ref="logfile" />
 
      </root>
 
</log4j:configuration