docs: @SuppressWarnings("unchecked")
          public static void executeCommand(String[] args) throws IOException {
  
              OptionParser parser = getParser();
  
              // declare parameters
              String url = null;
              List<Integer> nodeIds = null;
              Boolean allNodes = true;
              Boolean confirm = false;
  
              // parse command-line input
              OptionSet options = parser.parse(args);
              if(options.has(AdminParserUtils.OPT_HELP)) {
                  printHelp(System.out);
                  return;
              }
  
              // check required options and/or conflicting options
              AdminParserUtils.checkRequired(options, AdminParserUtils.OPT_URL);
              AdminParserUtils.checkOptional(options,
                                             AdminParserUtils.OPT_NODE,
                                             AdminParserUtils.OPT_ALL_NODES);
  
              // load parameters
              url = (String) options.valueOf(AdminParserUtils.OPT_URL);
              if(options.has(AdminParserUtils.OPT_NODE)) {
                  nodeIds = (List<Integer>) options.valuesOf(AdminParserUtils.OPT_NODE);
                  allNodes = false;
              }
              if(options.has(AdminParserUtils.OPT_CONFIRM)) {
                  confirm = true;
              }
  
              // print summary
              System.out.println("Remove metadata related to rebalancing");
              System.out.println("Location:");
              System.out.println("  bootstrap url = " + url);
              if(allNodes) {
                  System.out.println("  node = all nodes");
              } else {
                  System.out.println("  node = " + Joiner.on(", ").join(nodeIds));
              }
  
              // execute command
              if(!AdminToolUtils.askConfirm(confirm, "remove metadata related to rebalancing")) {
                  return;
              }
              AdminClient adminClient = AdminToolUtils.getAdminClient(url);
  
              if(allNodes) {
                  nodeIds = AdminToolUtils.getAllNodeIds(adminClient);
              }
  
              AdminToolUtils.assertServerNotInRebalancingState(adminClient, nodeIds);
  
              doMetaClearRebalance(adminClient, nodeIds);
          }