8.2.3 Failed to parse field of type text

I failed to show the code:

Reader r = new StringReader(node.toJSONString());
		try {
			IndexRequest<JsonData> request = 
				IndexRequest.of(b -> b
					.id(id)
					.index(index)
					.withJson(r));
			IndexResponse indexResponse = client.index(request);
			result.setResultObject(indexResponse.result().toString());
		} catch (Exception e) {
where node is a JSONObject - we grab its JSON string value, pass that to a reader, then into the IndexRequest