java - 尝试创建 log4j2 rollingfileappender 时出错

Question

我正在尝试从使用 FileAppender 切换到使用 log4j2 的 RollingFileAppender(同时发生在 beta3 和 beta4 jar 中)。

我将其配置为:

<RollingFile name="RollingFile" fileName="${logdir}/${filename}" 
    filePattern="${logdir}/app-%d{yyyy-MM-dd-hh-mm-ss}_%i.log" >
    <PatternLayout>
        <pattern>%d %p %C{1.} [%t] %m%n</pattern>
    </PatternLayout>
    <Policies>
        <OnStartupTriggeringPolicy/>
    </Policies>
    <DefaultRolloverStrategy max="20"/>
</RollingFile>  
        ...
<loggers>
          <root level="ERROR">
    <appender-ref ref="RollingFile"/>
    <appender-ref ref="STDOUT"/>
</root>
        ...

在代码中，我试图以这种方式获取记录器:

Logger logger = LogManager.getLogger(this.getClass());

但是当我运行它时出现了这个异常:

2013-02-01 17:56:54,773 ERROR Unable to invoke method createAppender in class org.apache.logging.log4j.core.appender.RollingFileAppender for element RollingFile java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.logging.log4j.core.config.BaseConfiguration.createPluginObject(BaseConfiguration.java:723)
    at org.apache.logging.log4j.core.config.BaseConfiguration.createConfiguration(BaseConfiguration.java:489)
    at org.apache.logging.log4j.core.config.BaseConfiguration.createConfiguration(BaseConfiguration.java:481)
    at org.apache.logging.log4j.core.config.BaseConfiguration.doConfigure(BaseConfiguration.java:162)
    at org.apache.logging.log4j.core.config.BaseConfiguration.start(BaseConfiguration.java:120)
    at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:271)
    at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:287)
    at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:139)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:76)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:31)
    at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:342)
    at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:301)
         ...
Caused by: java.lang.ClassCastException: org.apache.logging.log4j.core.appender.FileManager cannot be cast to org.apache.logging.log4j.core.appender.rolling.RollingFileManager
    at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.getFileManager(RollingFileManager.java:73)
    at org.apache.logging.log4j.core.appender.RollingFileAppender.createAppender(RollingFileAppender.java:140)
    ... 18 more

看起来好像正在读取配置文件并且正在尝试创建附加程序但不确定我做错了什么。

我已经尝试剪切和粘贴其他人的 RollingFileAppender 配置，但没有任何修改，但我仍然遇到上述错误。

谢谢。

Answer 1

在我的例子中，配置文件包含 File appender 和 RollingFile appender。

Error was in fileName parameter - it have same value in both appenders.