# Elasticsearch.Net Library for .NET Core with Docker linux container not working

**URL:** <https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070>\
**Category:** Elasticsearch\
**Created:** [May 8, 2018, 9:38pm UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070 "2018-05-08T21:38:16Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![Bikash\_Behuria](https://avatars.discourse-cdn.com/v4/letter/b/f14d63/32.png) [@Bikash\_Behuria](https://discuss.elastic.co/u/Bikash_Behuria)\
**Post date:** [May 8, 2018, 9:38pm UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/1 "2018-05-08T21:38:16Z")

</div>

Hi ,

I am not sure if anyone reported the following issue.

- When using [ASP.NET](http://ASP.NET) Core with Linux Docker container , \_bulk api is not working however same works fine if we run same code using Visual Studio. Below are my test code using Visual Studio 2017

**Sample Code snippet for connecting ElasticSearch and Post 2 JSON using \_bulk**  
var payload = new List();  
payload.Add("{"index":{"\_index":"logstash-2018.05.10","\_type":"logevent"}}");  
payload.Add(  
"{"@timestamp":"2018-05-07T09:57:25.8993627+02:00","level":"Information","messageTemplate":"Hello, world!","message":"Hello, world!"}");

var uri = new Uri("[http://localhost:9200](http://localhost:9200)");  
var configuration = new ConnectionConfiguration(uri);  
client.Bulk(PostData.MultiJson(payload));

This code works fine when using visual studio but get exception when using linux docker container . Below is the stack trace

**Exception (Stack Trace)**

Unsuccessful low level call on POST: /\_bulk\n# Audit trail of this API call:\n - [1] BadRequest: Node: [http://localhost:9200/](http://localhost:9200/) Took: 00:00:00.1886777\n# OriginalException: System.Net.Http.HttpRequestException: An error occurred while sending the request. ---\> System.Net.Http.CurlException: Couldn't connect to server\n at System.Net.Http.CurlHandler.ThrowIfCURLEError(CURLcode error)\n at System.Net.Http.CurlHandler.MultiAgent.FinishRequest(StrongToWeakReference`1 easyWrapper, CURLcode messageResult)\n --- End of inner exception stack trace ---\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\n at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()\n at System.Net.Http.HttpClient.d\_\_58.MoveNext()\n--- End of stack trace from previous location where exception was thrown ---\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\n at Elasticsearch.Net.HttpConnection.Request[TResponse](RequestData requestData)

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<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:** [May 9, 2018, 7:30am UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/2 "2018-05-09T07:30:11Z")

</div>

The issue looks to be related to being able to connect to Elasticsearch

> [@Bikash\_Behuria](#):
>
> System.Net.Http.CurlException: Couldn't connect to server\n at

Have you bound the correct Docker container ports to the host?

---

<div class="post-metadata">

**Author:** ![Bikash\_Behuria](https://avatars.discourse-cdn.com/v4/letter/b/f14d63/32.png) [@Bikash\_Behuria](https://discuss.elastic.co/u/Bikash_Behuria)\
**Post date:** [May 9, 2018, 12:56pm UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/3 "2018-05-09T12:56:11Z")

</div>

Hi ,

I have now bounded with port but received JSON invalidation error . But same works fine when I run without using Docker but running in Visual studio 2017 directly. Please note we are using Serilog Elasticsearch sink , which uses [Elasticsearch.Net](http://Elasticsearch.Net) lowlevel client. For testing puposse , I create JSON string , and supply that in Payload (List) and call bulk API with PostData.MultiJson(payload). I see the exception orgin is [ElasticSearch.net](http://ElasticSearch.net).

**My JSON**  
"{"index":{"\_index":"logstash-2018.05.09","\_type":"logevent"}}"  
"{"@timestamp":"2018-05-09T11:49:56.7878765+02:00","level":"Information","messageTemplate":"Hello, world!","message":"Hello, world!"}"

**API using bulk**

**DebugInformaion (when running in Docker)**  
2018-05-09T12:46:06.3315366Z Caught exception while preforming bulk operation to Elasticsearch: Elasticsearch.Net.Unexpe  
ctedElasticsearchClientException: Invalid JSON string ---\> System.Runtime.Serialization.SerializationException: Invalid  
JSON string  
at Elasticsearch.Net.SimpleJson.DeserializeObject(String json) in C:\Users\russ\source\elasticsearch-net-master\src\E  
[lasticsearch.Net](http://lasticsearch.Net)\Serialization\SimpleJson.cs:line 519  
at Elasticsearch.Net.SimpleJson.DeserializeObject(String json, Type type, IJsonSerializerStrategy jsonSerializerStrat  
egy) in C:\Users\russ\source\elasticsearch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Serialization\SimpleJson.cs:line 552  
at Elasticsearch.Net.LowLevelRequestResponseSerializer.Deserialize(Type type, Stream stream) in C:\Users\russ\source  
elasticsearch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Serialization\LowLevelRequestResponseSerializer.cs:line 27  
at Elasticsearch.Net.LowLevelRequestResponseSerializer.Deserialize[T](Stream stream) in C:\Users\russ\source\elastics  
earch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Serialization\LowLevelRequestResponseSerializer.cs:line 32  
at Elasticsearch.Net.ResponseBuilder.SetSpecialTypes[TResponse](Byte[] bytes, TResponse& cs) in C:\Users\russ\source  
elasticsearch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Transport\Pipeline\ResponseBuilder.cs:line 155  
at Elasticsearch.Net.ResponseBuilder.SetBody[TResponse](ApiCallDetails details, RequestData requestData, Stream respo  
nseStream, String mimeType) in C:\Users\russ\source\elasticsearch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Transport\Pipeline\Re  
sponseBuilder.cs:line 93  
at Elasticsearch.Net.ResponseBuilder.ToResponse[TResponse](RequestData requestData, Exception ex, Nullable`1 statusCo de, IEnumerable`1 warnings, Stream responseStream, String mimeType) in C:\Users\russ\source\elasticsearch-net-master\src  
\[Elasticsearch.Net](http://Elasticsearch.Net)\Transport\Pipeline\ResponseBuilder.cs:line 25  
at Elasticsearch.Net.HttpConnection.Request[TResponse](RequestData requestData) in C:\Users\russ\source\elasticsearch  
-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Connection\HttpConnection-CoreFx.cs:line 95  
at Elasticsearch.Net.RequestPipeline.CallElasticsearch[TResponse](RequestData requestData) in C:\Users\russ\source\el  
asticsearch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Transport\Pipeline\RequestPipeline.cs:line 451  
at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) in C:\Users\russ\source\elasticsearch-net-master\src\Elasticsearch.Net\Transport\Transport.cs:line 6 8 --- End of inner exception stack trace --- at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters  
requestParameters) in C:\Users\russ\source\elasticsearch-net-master\src\[Elasticsearch.Net](http://Elasticsearch.Net)\Transport\Transport.cs:line 8  
6  
at Serilog.Sinks.Elasticsearch.ElasticsearchSink.EmitBatchChecked[T](IEnumerable`1 events) in /opt/app-root/src/src/S erilog.Sinks.Elasticsearch/Sinks/ElasticSearch/ElasticSearchSink.cs:line 207 at Serilog.Sinks.Elasticsearch.ElasticsearchSink.EmitBatch(IEnumerable`1 events) in /opt/app-root/src/src/Serilog.Sin  
ks.Elasticsearch/Sinks/ElasticSearch/ElasticSearchSink.cs:line 75

**Debuginformation when using Visual Studio (success)**

# Audit trail of this API call:

- [1] HealthyResponse: Node: [http://elasticsearch-openshift-tosspoc-dev.ocp.got.volvo.net/](http://elasticsearch-openshift-tosspoc-dev.ocp.got.volvo.net/) Took: 00:00:00.0765788

# Request:

{"index":{"\_index":"dockertest","\_type":"logevent"}}  
{"@timestamp":"2018-05-09T11:49:56.7878765+02:00","level":"Information","messageTemplate":"Hello, world!","message":"Hello, world!"}

# Response:

{"took":6,"errors":false,"items":[{"index":{"\_index":"dockertest","\_type":"logevent","_id":"8S7xRGMBRhr-nlOL55j_","\_version":1,"result":"created","\_shards":{"total":2,"successful":1,"failed":0},"\_seq\_no":0,"\_primary\_term":1,"status":201}}]}  
2018-05-09T12:48:16.0934649Z {"index":{"\_index":"dockertest","\_type":"logevent"}}  
2018-05-09T12:48:16.0936111Z {"@timestamp":"2018-05-09T11:49:56.7878765+02:00","level":"Information","messageTemplate":"Hello, world!","message":"Hello, world!"}  
2018-05-09T12:48:16.0944369Z ############Writing Debug Logs Ends here######  
2018-05-09T12:48:16.1286254Z Successful low level call on POST: /\_bulk

# Audit trail of this API call:

- [1] HealthyResponse: Node: [http://elasticsearch-openshift-tosspoc-dev.ocp.got.volvo.net/](http://elasticsearch-openshift-tosspoc-dev.ocp.got.volvo.net/) Took: 00:00:00.0339359

# Request:

{"index":{"\_index":"dockertest","\_type":"logevent"}}  
{"@timestamp":"2018-05-09T11:49:56.7878765+02:00","level":"Information","messageTemplate":"Hello, world!","message":"Hello, world!"}

# Response:

{"took":7,"errors":false,"items":[{"index":{"\_index":"dockertest","\_type":"logevent","\_id":"8i7xRGMBRhr-nlOL7Zh0","\_version":1,"result":"created","\_shards":{"total":2,"successful":1,"failed":0},"\_seq\_no":0,"\_primary\_term":1,"status":201}}]}

---

<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:** [May 9, 2018, 2:31pm UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/4 "2018-05-09T14:31:17Z")

</div>

What version of Serilog Elasticsearch sink are you using, and what version of Elasticsearch are you running against?

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<div class="post-metadata">

**Author:** ![Bikash\_Behuria](https://avatars.discourse-cdn.com/v4/letter/b/f14d63/32.png) [@Bikash\_Behuria](https://discuss.elastic.co/u/Bikash_Behuria)\
**Post date:** [May 10, 2018, 4:53am UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/5 "2018-05-10T04:53:14Z")

</div>

Serilog Elasticsearch Sink Version # 6.5.0

[ElasticSearch.Net](http://ElasticSearch.Net) Version # 6.0.0

I also verified with [ElasticSearch.net](http://ElasticSearch.net) # 6.1.0

---

<div class="post-metadata">

**Author:** ![Bikash\_Behuria](https://avatars.discourse-cdn.com/v4/letter/b/f14d63/32.png) [@Bikash\_Behuria](https://discuss.elastic.co/u/Bikash_Behuria)\
**Post date:** [May 21, 2018, 7:02am UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/6 "2018-05-21T07:02:17Z")

</div>

Hi ,

I wanted to add one more observation.

When I am using direct REST call to \_bulk endpoint , from Docker , I always getting 404 not found. But the same works fine from Windows . for GET operation like \_cat/health?v , works both in Linux container and from Visual Studio.

Below are the sample code I am using for POST \_bulk operation

var client = new HttpClient(new HttpClientHandler {AllowAutoRedirect = false});

```
    var message = new HttpRequestMessage(System.Net.Http.HttpMethod.Post,
        new Uri("http://elasticsearch-openshift-tosspoc-dev.ocp.got.volvo.net/_bulk"));
   
        
      var strString1 = "{\"index\":{\"_index\":\"bikashbulktest1\",\"_type\":\"logevent\"}} \n " +
                        "{\"@timestamp\":\"2018-05-07T09:57:25.8993627+02:00\",\"level\":\"Information\",\"messageTemplate\":\"Hello, world!\",\"message\":\"Hello, world!\"}\n";
      

  
        HttpResponseMessage responseMessage = null;
        try
        {
            message.Content = new StringContent(strString1, Encoding.UTF8, "application/json");

            responseMessage = client.SendAsync(message).Result;

        }
        catch (Exception ex)
        {
            SelfLog.WriteLine("{0}" , ex.InnerException);

        }
        SelfLog.WriteLine("{0}", responseMessage.ToString());
         return responseMessage.ToString();
```

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<div class="post-metadata">

**Author:** ![Bikash\_Behuria](https://avatars.discourse-cdn.com/v4/letter/b/f14d63/32.png) [@Bikash\_Behuria](https://discuss.elastic.co/u/Bikash_Behuria)\
**Post date:** [May 28, 2018, 10:57am UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/7 "2018-05-28T10:57:21Z")

</div>

I found that Centos base docker image had some issue which they solved , which fixes this issue. please close this request

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<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:** [June 25, 2018, 10:57am UTC](https://discuss.elastic.co/t/elasticsearch-net-library-for-net-core-with-docker-linux-container-not-working/131070/8 "2018-06-25T10:57:22Z")

</div>

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