title: log4j properties: LevelMatchFilter doesn't work
body: <p>I was trying to route my Logging to two different files: one for INFO messages and another one for ERRORs. LevelMatchFilter seemed the right way to go. Unfortunately, all messages are logged to my info.log, not just the INFO messages. Any ideas what I did wrong?</p>
  
  <p>Here's my config:</p>
  
  <pre><code># Define the root logger with appender file
  log4j.logger.com.my.class.ClassName=DEBUG, FILE, ERR, CA
  
  # Define the info file appender
  log4j.appender.FILE=org.apache.log4j.FileAppender
  log4j.appender.FILE.File=info.log
  log4j.appender.FILE.filter.a=org.apache.log4j.varia.LevelMatchFilter
  log4j.appender.FILE.filter.a.LevelToMatch=INFO
  log4j.appender.FILE.filter.a.AcceptOnMatch=true
  
  # Define the layout for info file appender
  log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
  log4j.appender.FILE.layout.conversionPattern=%d %-5p %c - %m%n
  
  # Define the error file appender
  log4j.appender.ERR=org.apache.log4j.FileAppender
  log4j.appender.ERR.File=error.log
  log4j.appender.ERR.Threshold=ERROR
  
  # Define the layout for error file appender
  log4j.appender.ERR.layout=org.apache.log4j.PatternLayout
  log4j.appender.ERR.layout.conversionPattern=%d %-5p %c - %m%n
  
  
  log4j.appender.CA=org.apache.log4j.ConsoleAppender
  log4j.appender.CA.layout=org.apache.log4j.PatternLayout
  log4j.appender.CA.layout.ConversionPattern=%d %-5p %c - %m%n
  </code></pre>