如何配置 log4j 以将不同的日志级别记录到同一记录器的不同文件中 [英] How to configure log4j to log different log levels to different files for the same logger

问题描述

我有一个正常的 INFO 级别的应用程序日志.我需要的是另外记录所有错误级别的事件以分隔错误日志.我正在使用这样的配置:

I have a normal INFO level log for application. What I need is to additionally log all ERROR level events to separate error log. I am using configuration like this:

<logger name="com.acme">
  <level value="error"/>
  <appender-ref ref="error"/>
</logger>

<logger name="com.acme">
  <level value="info"/>
</logger>

<root>
  <level value="warn"/>
  <appender-ref ref="general"/>
</root>

此配置仅记录错误.如果我首先放置信息级别记录器，那么它只会记录到一般的附加程序，但错误记录器将不起作用.我想让他们都工作.

This configuration logs errors only. If I put info level logger first, then it will log only to general appender, but error logger will not work. I would like to have them both working.

推荐答案

你需要做的是有一个单独的 定义，定义级别为 INFO，但在你的两个 appender 中定义，您相应地设置它们的阈值，例如

What you need to do is have a single <logger> definition with a defined level of INFO, but in your two appender definitions, you set their thresholds accordingly, e.g.

<appender name="ERROR_FILE">
   <param name="Threshold" value="ERROR"/>
</appender>

<appender name="GENERAL">
   <param name="Threshold" value="INFO"/>
</appender>

然后将两个 appender 添加到记录器中:

You then add both appenders to your logger:

<logger name="com.acme">
  <level value="INFO"/>
  <appender-ref ref="ERROR_FILE"/>
  <appender-ref ref="GENERAL"/>
</logger>

现在进入记录器的日志条目将被发送到两个 appender，但由于它们具有不同的独立阈值，ERROR_FILE appender 只会记录 ERROR 及以上.

Log entries now going to the logger will get sent to both appenders, but since they have different independent thresholds, the ERROR_FILE appender will only log ERROR and above.

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