public void disconnect() throws Exception {
    if (jmxConnector != null) {
      jmxConnector.close();
      con = null;
      jmxConnector = null;
    }
  }
Rule constructor

@param portSupplier The JMX server port to connect to
geode-dunit/src/main/java/org/apache/geode/test/junit/rules/MBeanServerConnectionRule.java