title: TRACE log level
body: <p>I know following log levels in Log4J:</p>
  
  <pre><code>ALL &lt; DEBUG &lt; INFO &lt; WARN &lt; ERROR &lt; FATAL &lt; OFF
  </code></pre>
  
  <p>But in some samplers I found TRACE</p>
  
  <p>and <code>trace()</code> metod:</p>
  
  <pre><code>Logger LOG = Logger.getLogger(MyClass.class);
  LOG.trace("Instance created of AnotherClass");
  </code></pre>
  
  <p>In my IDE method <code>trace()</code> is not recognizable. Is this old Log4J library and <code>TRACE</code> appears only in some new one?</p>