Log4j在升级后在tomcat启动时显示内部log4j事件日志。

Question

我将Log4j从2.9.1升级到2.13.2。升级后，启动tomcat服务器时会显示大量不必要的日志。

DEBUG StatusLogger Using ShutdownCallbackRegistry class org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry
INFO StatusLogger Log4j appears to be running in a Servlet environment, but there's no log4j-web module available. If you want better web container support, please add the log4j-web JAR to your web archive or server lib directory.
INFO StatusLogger Log4j appears to be running in a Servlet environment, but there's no log4j-web module available. If you want better web container support, please add the log4j-web JAR to your web archive or server lib directory.
DEBUG StatusLogger Took 0.319733 seconds to load 239 plugins from ParallelWebappClassLoader
  context: ROOT
  delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@6d78f375

DEBUG StatusLogger PluginManager 'Converter' found 46 plugins
DEBUG StatusLogger Starting OutputStreamManager SYSTEM_OUT.false.false-1
DEBUG StatusLogger Starting LoggerContext[name=531f4093, org.apache.logging.log4j.core.LoggerContext@144283f3]...
DEBUG StatusLogger Reconfiguration started for context[name=531f4093] at URI null (org.apache.logging.log4j.core.LoggerContext@144283f3) with optional ClassLoader: null
INFO StatusLogger Log4j appears to be running in a Servlet environment, but there's no log4j-web module available. If you want better web container support, please add the log4j-web JAR to your web archive or server lib directory.
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=StatusLogger'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=ContextSelector'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=Loggers,name=*'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=Appenders,name=*'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=AsyncAppenders,name=*'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=AsyncLoggerRingBuffer'
TRACE StatusLogger Unregistering but no MBeans found matching 'org.apache.logging.log4j2:type=531f4093,component=Loggers,name=*,subtype=RingBuffer'

如何处理所有这些伐木？

我的log4j看起来就像

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>

        <!-- ********************** Concole **************************-->
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout pattern="%t %d{ABSOLUTE} %-5p [%c{1}] %m%n"/>
            <ThresholdFilter level="OFF"/>
        </Console>
<!-- other file appenders and loggers-->
  <!-- ********************************* Root ************************************ -->
        <Root level="INFO">
            <AppenderRef ref="console"/>
            <AppenderRef ref="async_file"/>
            <AppenderRef ref="async_errors_file" level="WARN"/>
        </Root>

    </Loggers>

</Configuration> 

我和<Configuratin status="WARN/OFF">试过了，但没有起作用。

我有以下依赖项

<dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-api</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-core</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-1.2-api</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-slf4j-impl</artifactId>
                <version>${log4j.version}</version>
            </dependency>

请建议什么是解决这个问题的方法？

Answer 1

来自Log4j文档：

From log4j-2.9 onward, log4j2 will print all internal logging to the console 
if system property log4j2.debug is defined (with any or no value).

检查您是否声明了-Dlog4j2.debug或-Dlog4j.debug，就像这样。在我的例子中，正如他们在doc中提到的那样，它没有任何价值，我将其更改为-Dlog4j.debug="ERROR"。现在，问题解决了，没有打印内部日志。

Answer 2

-DLOG4J-LEVEL=INFO试一下