public boolean requiresLayout() {
    log.debug("Ignoring requresLayout call.");

    return false;
  }
Calling the default constructor causes this appender to register JmxLog4J
as a JMX MBean.

@param mbeanServer to be injected for unit testing.
samza-log4j/src/main/java/org/apache/samza/logging/log4j/JmxAppender.java