Avoid Potential Infinite Loop in DFSNetworkTopology

    do {
      chosen = chooseRandomWithStorageTypeAndExcludeRoot(root, excludeRoot,
          type);
      if (excludedNodes == null || !excludedNodes.contains(chosen)) {
        break;
      } else {
        LOG.debug("Node {} is excluded, continuing.", chosen);
      }
    } while (true);