/** {@inheritDoc} */
  @Override
  public String toString() {
    ClusterNode oldestNode = this.oldestNode.get();

    return S.toString(
        GridDhtPartitionsExchangeFuture.class,
        this,
        "oldest",
        oldestNode == null ? "null" : oldestNode.id(),
        "oldestOrder",
        oldestNode == null ? "null" : oldestNode.order(),
        "evtLatch",
        evtLatch == null ? "null" : evtLatch.getCount(),
        "remaining",
        remaining(),
        "super",
        super.toString());
  }