logo标签列表

log4j2的LoggerContext在JMX界面或JConsole中没有显示出来

javalogginglog4jjmxlog4j2
3
今天我的谷歌搜索无果了！我正在尝试配置log4j2以便我可以通过JMX访问日志记录器并更改它们的日志级别。但是，当我将所有东西都连接起来时，JMX树（或log4j-jmx-gui）中没有任何记录器出现，如log4j2 JMX文档所示。只有在JConsole属性树和log4j-jmx-gui（独立或作为插件）中的StatusLogger选项卡中出现了log4j2 ContextSelector和StatusLogger。没有LoggerContext元素。
我已经搜索过了，没有找到任何内容！这可能意味着我在某个地方漏掉了什么。任何帮助对我来说都将不胜感激，因为我已经把头撞在墙上了:)
我正在win7上使用Log4j2 beta9和Java 1.6.0_45-b06。我已经在Java 7上尝试过了，结果行为相同。
正在使用的log4j2依赖项：
log4j-api-2.0-beta9.jar
log4j-core-2.0-beta9.jar

我的log4j2.xml文件:

<?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>

我的测试程序：

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);
        }
    }
}

测试程序的输出如下：
******** 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

log4j-jmx-gui中的StatusLogger选项卡确实有一个异常，但似乎与记录器无关。

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
2个回答
1
您的配置看起来不错，唯一有点可疑的是错误。错误似乎确实发生在LoggerContext构造函数中，所以它可能与此有关。
您可能已经发现了一个错误。是否介意在log4j2问题跟踪器中报告此问题，以便log4j团队可以查看？
嗨，Remko，感谢您的快速回复。问题已提出，编号为[LOG4J2-443]（https://issues.apache.org/jira/browse/LOG4J2-443）。 - colin_froggatt
1
Log4j2默认使用ClassLoaderContextSelector作为ContextSelector。在某些情况下（对于像您这样的简单应用程序可能不清楚），它返回空作为getLoggerContexts()方法调用结果。没有记录器上下文——没有显示，因此树形结构中不存在LoggerContext类别。可以通过选择另一个ContextSelector实现来解决问题。我使用了org.apache.logging.log4j.core.selector.BasicContextSelector来实现这个目的。可以使用系统属性"Log4jContextSelector"进行设置。有关更多信息，请参见docs。
它解决了我的问题，希望它也能解决您的问题。
网页内容由stack overflow 提供, 点击上面的
可以查看英文原文，
原文链接