Remko Popma created LOG4J2-219:
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             Summary: Named logger without root logger ends up with empty 
Appenders map - does not log anything
                 Key: LOG4J2-219
                 URL: https://issues.apache.org/jira/browse/LOG4J2-219
             Project: Log4j 2
          Issue Type: Bug
          Components: Core
    Affects Versions: 2.0-beta5
            Reporter: Remko Popma


On the log4j-user mailing list, Peter DePasquale gave this test case that 
demonstrates the problem:

Note that the configuration has no root logger, but only contains a named 
logger.

In a debugger I found that the LoggerConfig for "logtest.LogTest" ended up with 
an empty "appenders" Map<String, AppenderControl<?>>. The appenderRefs list did 
contain an AppenderRef object but in #callAppenders there are no 
AppenderControl objects to call...  

(Sorry, I have been unable to find out the underlying cause yet.)

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="warn">
        <appenders>
                <File name="tracelog" fileName="trace-log.txt" 
                                immediateFlush="true" append="false">
                        <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level 
%logger{36} - %msg%n"/>
                </File>
        </appenders>
        
        <loggers>
                <logger name="logtest.LogTest" level="trace">
                        <appender-ref ref="tracelog"/>
                </logger>
        </loggers>
</configuration>



package logtest;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.XMLConfigurationFactory;

public class LogTest {
        public static void main(String[] args) {
                
System.setProperty(XMLConfigurationFactory.CONFIGURATION_FILE_PROPERTY,
                                "log4j2-roottest.xml");

                Logger logger = LogManager.getLogger(LogTest.class);
                logger.trace("This is a trace message");
                logger.info("This is an info message");
                logger.warn("This is a warning message");
        }
}


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