# Having an issue with Nest and BulkDescriptor

**URL:** https://discuss.elastic.co/t/having-an-issue-with-nest-and-bulkdescriptor/138046
**Category:** Elasticsearch
**Created:** [June 29, 2018, 11:58pm UTC](https://discuss.elastic.co/t/having-an-issue-with-nest-and-bulkdescriptor/138046 "2018-06-29T23:58:40Z")
**Posts on this page:** 4
**Page:** 1

<div class="post-metadata">

### Author: ![Doug\_Nelson1](https://avatars.discourse-cdn.com/v4/letter/d/958977/32.png) [@Doug\_Nelson1](https://discuss.elastic.co/u/Doug_Nelson1)
#### Post date: [June 29, 2018, 11:58pm UTC](https://discuss.elastic.co/t/having-an-issue-with-nest-and-bulkdescriptor/138046/1 "2018-06-29T23:58:40Z")

</div>

I am having an issue with following code and it should work. I am trying to use the bulk api to perform partial updates on documents. The issue I am having is the execution hangs on the bulkRequest.Update method. Nothing errors but never returns even after several minutes,

```auto
using Nest;
using System;
using System.Collections.Generic;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            var esAnalyticClient = new ElasticClient(new ConnectionSettings(new Uri("http://localhost:9200")));
            var esUpdateClient = new ElasticClient(new ConnectionSettings(new Uri("http://localhost:9200")));
            var indexToUpdate = "testing";

            var pageSize = 1000;
            var currentPage = 0;

            while (true)
            {
                var searchResponse = esAnalyticClient.Search<dynamic>(s => s
                    .Type(string.Empty)
                    .Index("user_click")
                    .Query(q => q.Match(m => m.Field("indexName").Query(indexToUpdate)))
                    .Size(pageSize)
                    .From(currentPage * pageSize));

                if (searchResponse.Documents.Count == 0)
                    break;
                currentPage++;

                var bulkDescriptor = new BulkDescriptor();
                bulkDescriptor.Index(indexToUpdate);
                bulkDescriptor.Type("doc");

                foreach (var analyticDoc in searchResponse.Documents)
                {
                    bulkDescriptor.Update<dynamic, DocPartial>(s => s
                    .Id(analyticDoc.sourceId)
                    .Doc(new DocPartial { UserClickBoost = analyticDoc.UserClickBoost}));
                }

                var updateResponse = esUpdateClient
                   .Bulk(bulkDescriptor);

                var t = updateResponse.IsValid;

            }
        }
    }
}

```

Having a hard time figuring this one out. Using Nest 6.1.0.

---

<div class="post-metadata">

### Author: ![forloop](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/forloop/32/9021_2.png) [@forloop](https://discuss.elastic.co/u/forloop)
#### Post date: [July 1, 2018, 11:18pm UTC](https://discuss.elastic.co/t/having-an-issue-with-nest-and-bulkdescriptor/138046/2 "2018-07-01T23:18:06Z")

</div>

Hey @Doug_Nelson1, the issue here is the use of `dynamic` in the `.Search<TDocument>(...)` call in conjunction with passing `analyticDoc.sourceId` for the `.Id(...)` of the document to update in the `.Update<TDocument, TPartialDocument>(...)` call.

When `dynamic` is specified as the type for `TDocument` in the `.Search<TDocument>(...)` call, the types returned in 6.x will actually be of type `Nest.Json.Linq.JObject`, the internalized version of [Json.NET](http://Json.NET)'s `JObject` type. Because the document type is `dynamic`, any dereferencing of properties on the document will return dynamic values, so `analyticDoc.sourceId` will be `dynamic`, as will `analyticDoc.UserClickBoost`. The former causes a problem for NEST when trying to determine the underlying type for the id of the document to update, which is where it hangs. Ultimately, it's a constraint related to dynamic dispatch which we won't fix. It's similar to this issue and the issues linked to within it:

> <https://github.com/elastic/elasticsearch-net/issues/2981>

The fix here is pretty straightforward though if you know the types for `sourceId` and `UserClickBoost` (aside: should this property be camel cased?) that you're dealing with. Here's an example to demonstrate.

Assuming the following is indexed

```json
PUT user_click
{
  "mappings": {
    "doc": {
      "properties": {
        "indexName": {
          "type": "keyword"
        },
        "sourceId": {
          "type": "keyword"
        },
        "userClickBoost": {
          "type": "double"
        }
      }
    }
  }
}

PUT user_click/doc/1
{
  "indexName": "testing",
  "sourceId": "2",
  "userClickBoost": 0.5
}

PUT testing/doc/2
{
  "userClickBoost": 0.2
}

```

Then you can do the following in NEST

```auto
private static void Main()
{

    var pool = new SingleNodeConnectionPool(new Uri("https://localhost:9200"));

    var settings = new ConnectionSettings(pool);

	var esAnalyticClient = new ElasticClient(settings);
	var esUpdateClient = new ElasticClient(settings);
	var indexToUpdate = "testing";

	var pageSize = 1000;
	var currentPage = 0;

	while (true)
	{
		var searchResponse = esAnalyticClient.Search<dynamic>(s => s
			.Type(string.Empty)
			.Index("user_click")
			.Query(q => q.Match(m => m.Field("indexName").Query(indexToUpdate)))
			.Size(pageSize)
			.From(currentPage * pageSize));

		if (searchResponse.Documents.Count == 0)
			break;
		currentPage++;

		var bulkDescriptor = new BulkDescriptor();
		bulkDescriptor.Index(indexToUpdate);
		bulkDescriptor.Type("doc");

		foreach (var analyticDoc in searchResponse.Documents)
		{
			bulkDescriptor.Update<dynamic, DocPartial>(s => s
				.Id((string)analyticDoc.sourceId)
				.Doc(new DocPartial { UserClickBoost = (double?)analyticDoc.userClickBoost })
			);
		}

		var updateResponse = esUpdateClient
		   .Bulk(bulkDescriptor);

		var t = updateResponse.IsValid;
	}
}

public class DocPartial
{
	public double? UserClickBoost { get; set; }
}

```

By casting `sourceId` and `userClickBoost` to the known types, the problem with dynamic dispatch can be avoided.

---

<div class="post-metadata">

### Author: ![Doug\_Nelson1](https://avatars.discourse-cdn.com/v4/letter/d/958977/32.png) [@Doug\_Nelson1](https://discuss.elastic.co/u/Doug_Nelson1)
#### Post date: [July 2, 2018, 2:11pm UTC](https://discuss.elastic.co/t/having-an-issue-with-nest-and-bulkdescriptor/138046/3 "2018-07-02T14:11:17Z")

</div>

Thanks Russ that fix solved my issue.

---

<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 30, 2018, 2:11pm UTC](https://discuss.elastic.co/t/having-an-issue-with-nest-and-bulkdescriptor/138046/4 "2018-07-30T14:11:20Z")

</div>

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