Log4j: Logging Errors(No appenders could be found for logger)

Question

hi,
i used logging in my java application. i placed log4j.jar and log4j.xml file paths
given in classpath.
i am getting 2 warning Messages. Those are as follows
Log4j:WARN. No appenders could be found for logger (Myclass.class)
Log4j:WARN. Use Log4j System Properly.
Here is what i done
log4j.xml is external configuration file. I specified Appender and layout
information in this.
Here is log4j.xml content...
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="appender" class="org.apache.log4j.FileAppender">
<param name="File" value="C:\LOG\log.txt"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.SimpleLayout"/>
</appender>
<root>
<priority value ="INFO"/>
<appender-ref ref="appender"/>
</root>
</log4j:configuration>
I specified appender and layout in log4j.xml file and placed log4j.xml file in
classpath.
How can i solve this problem?. Please help me.

Answer 1

Ok. I'm no log4j expert, but if you try to get a logger called Myclass.class and have not defined one in your xml file, there's a problem? Look at my xml file below, especially the category tag. Instead of putting "All" for the name, you would put "Myclass.class".
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="file" class="org.apache.log4j.FileAppender">
<param name="File" value="log/log.txt"/>
<param name="Append" value="true"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%l) - %m\n"/>
</layout>
</appender>
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.Out"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %C{1}.%M - %m\n"/>
</layout>
</appender>
<!-- The All category -->
<category name="All" additivity="false">
<priority value="debug"/>
<appender-ref ref="file"/>
<appender-ref ref="console"/>
</category>
<!-- The one and only root category -->
<root>
<priority value="warn"/>
<appender-ref ref="console"/>
</root>
</log4j:configuration>