code: public void printAllValues() throws Exception {
      err("List of all the available keys:");
  
      Object val = null;
  
      for (ObjectName oname: hadoopObjectNames) {
        err(">>>>>>>>jmx name: " + oname.getCanonicalKeyPropertyListString());
        MBeanInfo mbinfo = mbsc.getMBeanInfo(oname);
        MBeanAttributeInfo [] mbinfos = mbinfo.getAttributes();
  
        for (MBeanAttributeInfo mb: mbinfos) {
          val = mbsc.getAttribute(oname, mb.getName());
          System.out.format(format,mb.getName(),val.toString());
        }
      }
    }
docs: print all attributes' values