尽管isDebugEnabled为true，但log4j的调试信息没有显示在控制台中。

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问题描述

我正在使用项目中的以下代码将log4j

登录调试消息

private static final Logger LOG = Logger.getLogger(MyClass.class)
// ...
if(LOG.isDebugEnabled()) {
    LOG.debug("my log message");
}

我可以通过在编写调试消息的行中添加一个断点，即LOG.isDebugEnabled()确实返回true，可以确认我的log4j配置是正确的. 有趣的是，我的调试消息并未显示在我的IDE(Intellij)的控制台中，但是在将LOG.debug()更改为LOG.info()时，信息消息将按预期记录.

有什么想法我应该寻找什么才能找出这里出了什么问题?

编辑:这是我的log4j.properties文件

log4j.appender.Stdout=org.apache.log4j.ConsoleAppender
log4j.appender.Stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.Stdout.layout.conversionPattern=%-5p [%d{dd.MM.yy HH:mm:ss}] %C{1} - %m [thread: %t]\n
log4j.appender.Stdout.threshold=info

log4j.appender.StandaloneFile=org.apache.log4j.RollingFileAppender
log4j.appender.StandaloneFile.File=logs/standalone.log
log4j.appender.StandaloneFile.MaxFileSize=5MB
log4j.appender.StandaloneFile.MaxBackupIndex=20
log4j.appender.StandaloneFile.layout=org.apache.log4j.PatternLayout
log4j.appender.StandaloneFile.layout.ConversionPattern=%-5p [%d{dd.MM.yy HH:mm:ss}] %C{1} - %m [thread: %t]\n
log4j.appender.StandaloneFile.threshold=info

log4j.rootLogger=info, Stdout, StandaloneFile
log4j.logger.com.myPacke.package1=info, Stdout, StandaloneFile

log4j.logger.com.myPacke.package2=DEBUG

其他推荐答案

确保您的配置在appender以下...我们使用了log4j.xml，所以我从xml

添加

<appender name="console" class="org.apache.log4j.ConsoleAppender">
    <param name="Target" value="System.out" />
    <param name="Threshold" value="info" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%-5p: %c - %m%n" />
    </layout>
</appender>

<appender name="logfile" class="org.apache.log4j.RollingFileAppender">
    <param name="File" value="log/dcm_migration.log" />
    <param name="Append" value="false" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%d  %-5p  [%c{1}] %m %n" />
    </layout>
</appender>

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问题描述

I am using the following code within my project to log debug messages with log4j

private static final Logger LOG = Logger.getLogger(MyClass.class)
// ...
if(LOG.isDebugEnabled()) {
    LOG.debug("my log message");
}

I can confirm that my log4j configuration is correct by adding a break point at the line where the debug message is written, i.e. LOG.isDebugEnabled() does return true. Interestingly, my debug message does not show up in the console of my IDE (IntelliJ), however when changing LOG.debug() to LOG.info(), the info message is logged as expected.

Any ideas what I should be looking for in order to find out what's going wrong here?

EDIT: here's my log4j.properties file

log4j.appender.Stdout=org.apache.log4j.ConsoleAppender
log4j.appender.Stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.Stdout.layout.conversionPattern=%-5p [%d{dd.MM.yy HH:mm:ss}] %C{1} - %m [thread: %t]\n
log4j.appender.Stdout.threshold=info

log4j.appender.StandaloneFile=org.apache.log4j.RollingFileAppender
log4j.appender.StandaloneFile.File=logs/standalone.log
log4j.appender.StandaloneFile.MaxFileSize=5MB
log4j.appender.StandaloneFile.MaxBackupIndex=20
log4j.appender.StandaloneFile.layout=org.apache.log4j.PatternLayout
log4j.appender.StandaloneFile.layout.ConversionPattern=%-5p [%d{dd.MM.yy HH:mm:ss}] %C{1} - %m [thread: %t]\n
log4j.appender.StandaloneFile.threshold=info

log4j.rootLogger=info, Stdout, StandaloneFile
log4j.logger.com.myPacke.package1=info, Stdout, StandaloneFile

log4j.logger.com.myPacke.package2=DEBUG

其他推荐答案

Make sure your configuration has below appender...We have used log4j.xml so i am adding from xml

<appender name="console" class="org.apache.log4j.ConsoleAppender">
    <param name="Target" value="System.out" />
    <param name="Threshold" value="info" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%-5p: %c - %m%n" />
    </layout>
</appender>

<appender name="logfile" class="org.apache.log4j.RollingFileAppender">
    <param name="File" value="log/dcm_migration.log" />
    <param name="Append" value="false" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%d  %-5p  [%c{1}] %m %n" />
    </layout>
</appender>

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