title: getting error trying to create log4j2 rollingfileappender
body: <p>I'm trying to switch from using FileAppender to the RollingFileAppender using log4j2 (happens both with beta3 and beta4 jars).</p>
  
  <p>I have it configured as:</p>
  
  <pre><code>&lt;RollingFile name="RollingFile" fileName="${logdir}/${filename}" 
      filePattern="${logdir}/app-%d{yyyy-MM-dd-hh-mm-ss}_%i.log" &gt;
      &lt;PatternLayout&gt;
          &lt;pattern&gt;%d %p %C{1.} [%t] %m%n&lt;/pattern&gt;
      &lt;/PatternLayout&gt;
      &lt;Policies&gt;
          &lt;OnStartupTriggeringPolicy/&gt;
      &lt;/Policies&gt;
      &lt;DefaultRolloverStrategy max="20"/&gt;
  &lt;/RollingFile&gt;  
          ...
  &lt;loggers&gt;
            &lt;root level="ERROR"&gt;
      &lt;appender-ref ref="RollingFile"/&gt;
      &lt;appender-ref ref="STDOUT"/&gt;
  &lt;/root&gt;
          ...
  </code></pre>
  
  <p>and in the code, I'm trying to get the logger this way:</p>
  
  <pre><code>Logger logger = LogManager.getLogger(this.getClass());
  </code></pre>
  
  <p>but I'm getting this exception when I run it:</p>
  
  <pre>
  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
  </pre>
  
  <p>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.</p>
  
  <p>I've tried cutting and pasting other people's RollingFileAppender configuration w/o any modification but I still get the above error.</p>
  
  <p>Thanks.</p>