[LOG4J2-219] Named logger without root logger ends up with empty Appenders map - does not log anything

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-beta5
• Fix Version/s: 2.0-beta6
• Component/s: Core
• Assignee: Remko Popma
• Reporter: Remko Popma
• Created: 24/Apr/13 05:34
• Updated: 04/May/13 10:39
• Resolved: 04/May/13 10:39

Description

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"); }

}