public static void listMissingDiskStores() throws AdminException {
    InternalDistributedSystem ads = getAdminCnx();
    Set s = AdminDistributedSystemImpl.getMissingPersistentMembers(ads.getDistributionManager());
    if (s.isEmpty()) {
      System.out.println("The distributed system did not have any missing disk stores");
    } else {
      for (Object o : s) {
        System.out.println(o);
      }
    }
  }
this is a test hook to allow us to drive SystemAdmin functions without invoking main(), which
can call System.exit().
geode-core/src/main/java/org/apache/geode/internal/SystemAdmin.java