Log4j：无论配置如何，为什么根记录器会收集所有日志类型？ [英] Log4j: Why is the root logger collecting all log types regardless the configuration?

问题描述

我遇到问题，即使我在根标记中指定了ERROR级别，指定的appender也会将所有级别（debug，info，warn）记录到文件中，而不管设置如何。我不是log4j专家，所以感谢任何帮助。

I am having problem that even though I specify the level to ERROR in the root tag, the specified appender logs all levels (debug, info, warn) to the file regardless the settings. I am not a log4j expert so any help is appreciated.

以下是关于这个主题的更多信息：

Here is a bit more info on the subject:

• 我检查了log4j.properties的类路径（没有），除了log4j.xml

这里是log4j.xml文件：

here is the log4j.xml file:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>


    <!-- ============================== -->
    <!-- Append messages to the console -->
    <!-- ============================== -->


    <appender name="console" class="org.apache.log4j.ConsoleAppender">
        <param name="Target" value="System.out" />

        <layout class="org.apache.log4j.PatternLayout">
            <!-- The default pattern: Date Priority [Category] Message\n -->
            <param name="ConversionPattern" value="[AC - %5p] [%d{ISO8601}] [%t] [%c{1} - %L] %m%n" />
        </layout>
    </appender>

    <appender name="logfile" class="org.apache.log4j.RollingFileAppender">
        <param name="File" value="./logs/server.log" />
        <param name="MaxFileSize" value="1000KB" />
        <param name="MaxBackupIndex" value="2" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="[AC - %-5p] {%d{dd.MM.yyyy - HH.mm.ss}} %m%n" />
        </layout>
    </appender>

    <appender name="payloadAppender" class="org.apache.log4j.RollingFileAppender">
        <param name="File" value="./logs/payload.log" />
        <param name="MaxFileSize" value="1000KB" />
        <param name="MaxBackupIndex" value="10" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="[AC - %-5p] {%d{dd.MM.yyyy - HH.mm.ss}} %m%n" />
        </layout>
    </appender>

    <appender name="errorLog" class="org.apache.log4j.RollingFileAppender">
        <param name="File" value="./logs/error.log" />
        <param name="MaxFileSize" value="1000KB" />
        <param name="MaxBackupIndex" value="10" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="[AC - %-5p] {%d{dd.MM.yyyy - HH.mm.ss}} %m%n" />
        </layout>
    </appender>

    <appender name="traceLog"
        class="org.apache.log4j.RollingFileAppender">
        <param name="File" value="./logs/trace.log" />
        <param name="MaxFileSize" value="1000KB" />
        <param name="MaxBackupIndex" value="20" />

        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                value="[AccessControl - %-5p] {%t: %d{dd.MM.yyyy - HH.mm.ss,SSS}} %m%n" />
        </layout>
    </appender>

    <appender name="traceSocketAppender" class="org.apache.log4j.net.SocketAppender">
        <param name="remoteHost" value="localhost" />
        <param name="port" value="4445" />
        <param name="locationInfo" value="true" />
    </appender>

    <logger name="TraceLogger">
        <level value="trace" /> <!-- Set level to trace to activate tracing -->
        <appender-ref ref="traceLog" />     
    </logger>

    <logger name="org.springframework.ws.server.endpoint.interceptor">
        <level value="DEBUG" />
        <appender-ref ref="payloadAppender" />
    </logger>

    <root>
        <level value="error" />
        <appender-ref ref="errorLog" />
    </root>

</log4j:configuration>

如果我用另一个记录器替换root，则根本没有任何记录到指定的appender。

If I replace the root with another logger, then nothing gets logged at all to the specified appender.

<logger name="com.mydomain.logic">
    <level value="error" />
    <appender-ref ref="errorLog" />
</logger>

...谢谢大家到目前为止的提示： - ）

... and thank you guys for the hints so far:-)

推荐答案

根记录器位于记录器层次结构的顶部。它有以下三种方式：

The root logger resides at the top of the logger hierarchy. It is exceptional in three ways:

• 它始终存在，


• 其级别无法设置为null


• 无法通过名称检索它。

rootLogger是父亲所有的appenders。针对给定记录器的每个启用的日志记录请求都将转发到该记录器中的所有appender以及层次结构中较高的appender（包括rootLogger）

例如，如果将控制台 appender添加到根记录器，则所有已启用的记录请求将 at至少在控制台上打印。如果另外将文件追加器添加到记录器，例如 L ，则启用 L 和<$的记录请求c $ c> L's 儿童将在控制台上的和文件上打印。通过将additivity标志设置为false ，可以覆盖此默认行为，以便appender累积不再是。

For example, if the console appender is added to the root logger, then all enabled logging requests will at least print on the console. If in addition a file appender is added to a logger, say L, then enabled logging requests for L and L's children will print on a file and on the console. It is possible to override this default behavior so that appender accumulation is no longer additive by setting the additivity flag to false.

来自log4j手册

总结：

如果你不想传播记录事件到父记录器（比如rootLogger）然后在这些记录器中将additivity标志添加到false。在你的情况下：

If you want not to propagate a logging event to the parents loggers (say rootLogger) then add the additivity flag to false in those loggers. In your case:

<logger name="org.springframework.ws.server.endpoint.interceptor"
        additivity="false">
        <level value="DEBUG" />
        <appender-ref ref="payloadAppender" />
</logger>

在标准的log4j配置样式中（我更喜欢XML）：

In standard log4j config style (which I prefer to XML):

log4j.logger.org.springframework.ws.server.endpoint.interceptor = INFO, payloadAppender
log4j.additivity.org.springframework.ws.server.endpoint.interceptor = false

希望这有帮助。

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