title: What does <error-manager><only-once> mean in jboss-logging.xml
body: <p>does anyone know what </p>
  
  <pre><code>&lt;error-manager&gt;
      &lt;only-once/&gt;
  &lt;/error-manager&gt;
  </code></pre>
  
  <p>mean in jboss-logging.xml?</p>