message: Add mroe logging infor
diff: @@ -239,7 +239,8 @@ class MatchingFilesDatasetOp : public DatasetOpKernel {
  std::vector<string> children;
  Status s = fs->GetChildren(current_dir, &children);
  std::cout << "GetChildren status: " << s.ToString()
  - << "; Children size: " << children.size() << std::endl;
  + << "; Children size: " << children.size()
  + << "; Heap size: " << filepath_queue_.size() << std::endl;
  ret.Update(s);
  // If GetChildren() fails, continue the next search.
  @@ -282,6 +283,7 @@ class MatchingFilesDatasetOp : public DatasetOpKernel {
  const string& child_dir_path =
  io::JoinPath(current_dir, children[i]);
  const Status& child_dir_status = children_dir_status[i];
  + std::cout << "Child dir path: " << child_dir_path << std::endl;
  // If the IsDirectory call was cancelled we bail.
  if (child_dir_status.code() == tensorflow::error::CANCELLED) {
  