Details
Major Description
This issue raised after request to do so by Remko in StackOverflow question .
I am trying to configure log4j2 so that I can access the loggers via JMX and change their log levels.
However, when I hook everything up, none of the loggers show up in the JMX tree (or log4j-jmx-gui) as shown in the [log4j2 JMX docs](http://logging.apache.org/log4j/2.x/manual/jmx.html#ClientGUI). Only the log4j2 ContextSelector and StatusLogger in the JConsole attribute tree and the StatusLogger tab in the log4j-jmx-gui (stand-alone or as a plugin) show up. No LoggerContext elements.
I've googled and not come up with anything! That probably means I'm missing something somewhere. Any help would be greatly appreciated by me and wall which I'm banging my head against 
I'm using Log4j2 beta9 with Java 1.6.0_45-b06 on win7. I have tried it on Java 7 and it results in the same behaviour.
The log4j2 dependencies being used:
log4j-api-2.0-beta9.jar
log4j-core-2.0-beta9.jar
My log4j2.xml:
<?xml version="1.0" encoding="UTF-8" ?> <Configuration status="debug"> <Appenders> <Console name="log-test" target="SYSTEM_OUT"> <PatternLayout pattern="%d{DATE} %-5p LJX2 %c{1}: %m%n" /> </Console> </Appenders> <Loggers> <Logger name="top.Log4J2TestApp" level="debug" additivity="false"> <AppenderRef ref="log-test" /> </Logger> <Root level="trace"> <AppenderRef ref="log-test" /> </Root> </Loggers> </Configuration>
My test program:
package top; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; public class Log4J2TestApp { public static void main(String[] args) { System.out.println("******** Started ZZZ ****************"); Logger log = LogManager.getLogger(Log4J2TestApp.class); int cnt = 0; while (true) { log.warn("=========== Test message: {} ================", cnt++); Thread.sleep(1000); } } }
The output of the test program looks like this:
******** Started ZZZ **************** 2013-11-06 15:07:29,720 DEBUG Generated plugins in 0.000020959 seconds 2013-11-06 15:07:29,733 DEBUG Calling createLayout on class org.apache.logging.log4j.core.layout.PatternLayout for element PatternLayout with params(pattern="%d{DATE} %-5p LJX2 %c{1}: %m%n", Configuration(log4j2.xml), null, charset="null",alwaysWriteExceptions="null") 2013-11-06 15:07:29,735 DEBUG Generated plugins in 0.000013687 seconds 2013-11-06 15:07:29,737 DEBUG Calling createAppender on class org.apache.logging.log4j.core.appender.ConsoleAppender for element Console with params(PatternLayout(%d{DATE} %-5p LJX2 %c{1}: %m%n), null, target="SYSTEM_OUT", name="log-test",follow="null", ignoreExceptions="null") 2013-11-06 15:07:29,739 DEBUG Jansi is not installed, cannot find org.fusesource.jansi.WindowsAnsiOutputStream2013-11-06 15:07:29,740 DEBUG Calling createAppenders on class org.apache.logging.log4j.core.config.plugins.AppendersPlugin for element Appenders with params(Appenders={log-test}) 2013-11-06 15:07:29,742 DEBUG Generated plugins in 0.000012832 seconds 2013-11-06 15:07:29,743 DEBUG Calling createAppenderRef on class org.apache.logging.log4j.core.config.AppenderRef for element AppenderRef with params(ref="log-test", level="null", null) 2013-11-06 15:07:29,746 DEBUG Calling createLogger on class org.apache.logging.log4j.core.config.LoggerConfig for element Logger with params(additivity="false", level="debug", name="top.Log4J2TestApp", includeLocation="null", AppenderRef={log-test}, Properties={}, Configuration(log4j2.xml), null) 2013-11-06 15:07:29,749 DEBUG Calling createAppenderRef on class org.apache.logging.log4j.core.config.AppenderRef for element AppenderRef with params(ref="log-test", level="null", null) 2013-11-06 15:07:29,751 DEBUG Calling createLogger on class org.apache.logging.log4j.core.config.LoggerConfig$RootLogger for element Root with params(additivity="null", level="trace", includeLocation="null", AppenderRef={log-test}, Properties={}, Configuration(log4j2.xml), null) 2013-11-06 15:07:29,754 DEBUG Calling createLoggers on class org.apache.logging.log4j.core.config.plugins.LoggersPluginfor element Loggers with params(Loggers={top.Log4J2TestApp, root}) 2013-11-06 15:07:29,755 DEBUG Reconfiguration completed 06 Nov 2013 15:07:29,763 WARN LJX2 Log4J2TestApp: =========== Test message: 0 ================ .... 06 Nov 2013 15:07:36,766 WARN LJX2 Log4J2TestApp: =========== Test message: 7 ================ 2013-11-06 15:07:51,450 DEBUG ServletContext not present - WebLookup not added 2013-11-06 15:07:51,451 DEBUG Shutting down OutputStreamManager SYSTEM_OUT
The StatusLogger tab in the log4j-jmx-gui does have one exception but it would seem to have nothing to do with the loggers.
2013-11-06 15:41:01,403 WARN Multiple logging implementations found:
Factory: org.apache.logging.log4j.core.impl.Log4jContextFactory, Weighting: 10
Using factory: org.apache.logging.log4j.core.impl.Log4jContextFactory
2013-11-06 15:41:01,505 WARN JmDNS or serviceInfo class not found java.lang.ClassNotFoundException: javax.jmdns.JmDNS
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:171)
at org.apache.logging.log4j.core.net.MulticastDNSAdvertiser.initializeJMDNS(MulticastDNSAdvertiser.java:228)
at org.apache.logging.log4j.core.net.MulticastDNSAdvertiser.<clinit>(MulticastDNSAdvertiser.java:41)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:171)
at org.apache.logging.log4j.core.config.plugins.PluginManager.decode(PluginManager.java:241)
at org.apache.logging.log4j.core.config.plugins.PluginManager.collectPlugins(PluginManager.java:152)
at org.apache.logging.log4j.core.config.plugins.PluginManager.collectPlugins(PluginManager.java:130)
at org.apache.logging.log4j.core.pattern.PatternParser.<init>(PatternParser.java:116)
at org.apache.logging.log4j.core.pattern.PatternParser.<init>(PatternParser.java:102)
at org.apache.logging.log4j.core.layout.PatternLayout.createPatternParser(PatternLayout.java:183)
at org.apache.logging.log4j.core.layout.PatternLayout.<init>(PatternLayout.java:115)
at org.apache.logging.log4j.core.layout.PatternLayout.createLayout(PatternLayout.java:219)
at org.apache.logging.log4j.core.config.DefaultConfiguration.<init>(DefaultConfiguration.java:51)
at org.apache.logging.log4j.core.LoggerContext.<init>(LoggerContext.java:63)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:217)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:114)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:81)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:83)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:34)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:387)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:332)
at top.Log4J2TestApp.main(Log4J2TestApp.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
2013-11-06 15:41:01,612 DEBUG Generated plugins in 0.000017537 seconds
2013-11-06 15:41:01,625 DEBUG Calling createLayout on class org.apache.logging.log4j.core.layout.PatternLayout for element PatternLayout with params(pattern="%d{DATE} %-5p LJX2 %c{1}: %m%n", Configuration(log4j2.xml), null, charset="null", alwaysWriteExceptions="null")
2013-11-06 15:41:01,627 DEBUG Generated plugins in 0.000011977 seconds
2013-11-06 15:41:01,629 DEBUG Calling createAppender on class org.apache.logging.log4j.core.appender.ConsoleAppender for element Console with params(PatternLayout(%d{DATE} %-5p LJX2 %c{1}: %m%n), null, target="SYSTEM_OUT", name="log-test", follow="null", ignoreExceptions="null")
2013-11-06 15:41:01,631 DEBUG Jansi is not installed, cannot find org.fusesource.jansi.WindowsAnsiOutputStream
2013-11-06 15:41:01,632 DEBUG Calling createAppenders on class org.apache.logging.log4j.core.config.plugins.AppendersPlugin for element Appenders with params(Appenders={log-test})
2013-11-06 15:41:01,633 DEBUG Generated plugins in 0.000011977 seconds
2013-11-06 15:41:01,635 DEBUG Calling createAppenderRef on class org.apache.logging.log4j.core.config.AppenderRef for element AppenderRef with params(ref="log-test", level="null", null)
2013-11-06 15:41:01,637 DEBUG Calling createLogger on class org.apache.logging.log4j.core.config.LoggerConfig for element Logger with params(additivity="false", level="debug", name="top.Log4J2TestApp", includeLocation="null", AppenderRef={log-test}, Properties={}, Configuration(log4j2.xml), null)
2013-11-06 15:41:01,640 DEBUG Calling createAppenderRef on class org.apache.logging.log4j.core.config.AppenderRef for element AppenderRef with params(ref="log-test", level="null", null)
2013-11-06 15:41:01,642 DEBUG Calling createLogger on class org.apache.logging.log4j.core.config.LoggerConfig$RootLogger for element Root with params(additivity="null", level="trace", includeLocation="null", AppenderRef={log-test}, Properties={}, Configuration(log4j2.xml), null)
2013-11-06 15:41:01,644 DEBUG Calling createLoggers on class org.apache.logging.log4j.core.config.plugins.LoggersPlugin for element Loggers with params(Loggers={top.Log4J2TestApp, root})
2013-11-06 15:41:01,646 DEBUG Reconfiguration completed