/** {@inheritDoc} */
  @Override
  public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
    super.readExternal(in);

    failedNodesIds = U.readList(in);
  }
  /** {@inheritDoc} */
  @Override
  public void writeExternal(ObjectOutput out) throws IOException {
    super.writeExternal(out);

    U.writeCollection(out, failedNodesIds);
  }