message: Log a warning instead of silently ignoring errors during kernel lookup.
diff: @@ -49,9 +49,12 @@ string TryFindKernelClass(const string& serialized_node_def) {
  return "";
  }
  string class_name = "";
  - tensorflow::FindKernelDef(tensorflow::DeviceType(parsed_name.type.c_str()),
  - node_def, nullptr /* kernel_def */, &class_name)
  - .IgnoreError();
  + status = tensorflow::FindKernelDef(
  + tensorflow::DeviceType(parsed_name.type.c_str()), node_def,
  + nullptr /* kernel_def */, &class_name);
  + if (!status.ok()) {
  + LOG(WARNING) << "Op [" << node_def.op() << "]: " << status;
  + }
  return class_name;
  }
  