Log4j only logs in main class. What I'm doing wrong? [closed]

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I'm currently struggling to lo开发者_如何学运维g with log4j. I've created a xml configuration file and succeeded to log in my main class:

log4j.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="LogAppender" class="org.apache.log4j.FileAppender">
    <param name="file" value="logs/somelogfile.log" />
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d [%t] %p - %m%n" />
    </layout>
  </appender>

  <root>
    <priority value="ERROR" />
    <appender-ref ref="LogAppender" />
  </root>

</log4j:configuration>

My main class:

public class Main {

    static Logger logger = Logger.getLogger(Main.class);
    /**
     * @param args
     */

    public static void main(String[] args) {
            // TODO Auto-generated method stub
        DOMConfigurator.configure("config/log4j.xml");

        logger.error("Hi");
    }

}

Unfortunatly, logging in other classes (in another package) doens't work. No matter if I call the DOMConfigurator or not, nothing is beeing logged. What I'm missing here? (Logger is always created with Logger.getLogger(Classname.class))

EDIT:

Sorry, I'm a dump! It's working. Just recognised, that I was catching the wrong exception in my other class, so that the logger was never called.

---

You need to provision loggers in your log4j.xml file to point to appenders. Here is an example:

<logger name="com.mycompany.apackage.MyClass">
  <level value="info"/>
  <appender-ref ref="appender-name-here" />
</logger>

Also, your root logger will only allow ERROR level logging (priority value="ERROR").