java 尝试创建 log4j2 滚动文件附加程序时出错
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getting error trying to create log4j2 rollingfileappender
提问by phaedrus
I'm trying to switch from using FileAppender to the RollingFileAppender using log4j2 (happens both with beta3 and beta4 jars).
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）。
I have it configured as:
我将它配置为：
<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>
...
and in the code, I'm trying to get the logger this way:
在代码中，我试图以这种方式获取记录器：
Logger logger = LogManager.getLogger(this.getClass());
but I'm getting this exception when I run it:
但是我在运行它时遇到了这个异常：
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
It looks as if the config file is being read and the appender is trying to get created but not sure what I'm doing wrong.
看起来好像正在读取配置文件并且附加程序正在尝试创建但不确定我做错了什么。
I've tried cutting and pasting other people's RollingFileAppender configuration w/o any modification but I still get the above error.
我试过在没有任何修改的情况下剪切和粘贴其他人的 RollingFileAppender 配置，但我仍然收到上述错误。
Thanks.
谢谢。
回答by Lagrang
In my case configuration file contain File appenderwith RollingFile appender.
在我的情况下配置文件中包含File appender有RollingFile appender。
Error was in
fileNameparameter - it have same value in both appenders.
错误在
fileName参数中 - 它在两个附加程序中具有相同的值。
