for (final String index : configIndices) {
            final String oldIndex = "." + index;
            if (client.existsIndex(oldIndex) && client.existsIndex(index)) {
                logger.info("Copying from {} to {}", oldIndex, index);
                if (!client.reindex(oldIndex, index, false)) {
                    logger.warn("Failed to copy from {} to {}", oldIndex, index);
                }

      threshold = newTable.length() * 3 / 4;
      int newMask = newTable.length() - 1;
      for (int oldIndex = 0; oldIndex < oldCapacity; ++oldIndex) {
        // We need to guarantee that any existing reads of old Map can
        // proceed. So we cannot yet null out each bin.
        E head = oldTable.get(oldIndex);

        if (head != null) {
          E next = head.getNext();

      threshold = newTable.length() * 3 / 4;
      int newMask = newTable.length() - 1;
      for (int oldIndex = 0; oldIndex < oldCapacity; ++oldIndex) {
        // We need to guarantee that any existing reads of old Map can
        // proceed. So we cannot yet null out each bin.
        E head = oldTable.get(oldIndex);

        if (head != null) {
          E next = head.getNext();