如何消除log4net中的重复日志记录? [英] How do I eliminate duplicate logging in log4net?

问题描述

我有一个程序，可以对"myprogram"记录器进行许多log4net调用.它还调用其他使log4net调用其他记录器的代码.我想为"myprogram"捕获高于INFO的所有日志，并为其他所有捕获高于WARN的所有日志.通过这种方式，我可以获取特定于我正在处理的任务的正在进行中的消息，但仍会在支持代码中收到有关潜在不良情况的通知.我希望将其发送到控制台和日志文件.

I have a program that makes many log4net calls to the "myprogram" loggers. It also calls other code that makes log4net calls to other loggers. I want to capture all logs higher than INFO for "myprogram" and all logs higher than WARN for everything else. This way, I get the work-in-progress messages specific to the task I'm working on, but am still notified of potentially bad things happening in the supporting code. I want this sent to both Console and a log file.

我有以下log4net配置:

I have the following log4net config:

<log4net>
    <root>
        <level value="WARN" />
        <appender-ref ref="Console" />
        <appender-ref ref="LogFile" />
    </root>
    <logger name="myprogram">
        <level value="INFO" />
        <appender-ref ref="Console" />
        <appender-ref ref="LogFile" />
    </logger>
    <appender name="Console" type="log4net.Appender.ConsoleAppender">
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%message%newline" />
        </layout>
        <threshold value="INFO" />
    </appender>
    <appender name="LogFile" type="log4net.Appender.RollingFileAppender">
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="- %utcdate %level %logger %ndc %thread %message%newline" />
        </layout>
        <appendToFile value="false" />
        <staticLogFileName value="true" />
        <rollingStyle value="Once" />
        <file value="mylogfile" />
        <immediateFlush value="true" />
        <threshold value="INFO" />
        <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    </appender>
</log4net>

这对我来说非常有意义:对所有内容登录> WARN，对特定的"myprogram"记录器登录> INFO.

This makes perfect sense to me: log >WARN for everything and >INFO for the specific "myprogram" logger.

问题是我在Console和LogFile上都记录了两次的INFO消息.仅当我同时填充了<root>和<logger>元素时，才会发生这种情况.如果我删除其中任何一个，则其余的按我的预期工作.

The problem is that I'm getting INFO messages logged twice on both Console and LogFile. This only happens if I have both the <root> and <logger> elements filled though; if I remove either one, then the remaining one works as I expect.

我能理解我是否正在两次记录WARN条目(因为myprogram同时匹配"root"和"myprogram")，但是即使将ROOT(大概)设置为WARN，它也在INFO发生.

I could understand if I was getting double-logging of WARN entries (since myprogram matches both "root" and "myprogram"), but it's happening at INFO even though ROOT is (presumably) set to WARN.

我在这里做错什么了吗，或者这是一个log4net错误/歧义?

Am I doing something wrong here, or is this a log4net bug/ambiguity?

推荐答案

您正在重复，因为您告诉它两次记录消息.我不建议在这里使用可加性，因为您可能会遇到一些副作用，只需删除不必要的配置即可:

You are getting duplicated because you are telling it to log messages twice. I wouldn't recommend using additivity here since you might experience some side effects, simply remove unnecessary configuration:

<root>
    <level value="WARN" />
    <appender-ref ref="Console" />
    <appender-ref ref="LogFile" />
</root>
<logger name="myprogram">
    <level value="INFO" />
</logger>

您不需要在logger myprogram中指示appender-ref，因为它将从根logger继承它们.如果再次指定它们，它将记录两次.

You don't need to indicate the appender-ref in the logger myprogram since it will inherit them from the root logger; if you specify them again it will log twice.

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