# NoClassDefFoundError HttpAsyncResponseConsumer
**URL:** https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231
**Category:** Elasticsearch
**Created:** [October 28, 2016, 4:13am UTC](https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231 "2016-10-28T04:13:28Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Sharat\_Jagannath](https://discuss.elastic.co/u/Sharat_Jagannath)
#### Post date: [October 28, 2016, 4:13am UTC](https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231/1 "2016-10-28T04:13:28Z")
getting following error
java.lang.NoClassDefFoundError: org/apache/http/nio/protocol/HttpAsyncResponseConsumer
for code-
RestClientImpl impl=new RestClientImpl();
impl.restClient= RestClient.builder( new HttpHost("localhost", 9200)).build();
imported these two-
import org.apache.http.HttpHost;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
using ES v5 rest api jar.
---
### Author:  [@nik9000](https://discuss.elastic.co/u/nik9000)
#### Post date: [October 30, 2016, 3:36am UTC](https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231/2 "2016-10-30T03:36:38Z")
I believe this is the same problem as
>
You can work around it by adding the http client's dependencies to your POM. In gradle they look like:
```auto
compile "org.apache.httpcomponents:httpclient:4.5.2"
compile "org.apache.httpcomponents:httpcore:4.4.5"
compile "org.apache.httpcomponents:httpasyncclient:4.1.2"
compile "org.apache.httpcomponents:httpcore-nio:4.4.5"
compile "commons-codec:commons-codec:1.10"
compile "commons-logging:commons-logging:1.1.3"
```
I won't try to translate that to maven because I can't test it locally at this point but it should be fairly trivial. I'll update the issue I linked above to make it clear that this is also happening for the http client.
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### Author:  [@nik9000](https://discuss.elastic.co/u/nik9000)
#### Post date: [October 30, 2016, 3:39am UTC](https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231/3 "2016-10-30T03:39:12Z")
Actually the [pom](http://repo1.maven.org/maven2/org/elasticsearch/client/rest/5.0.0/rest-5.0.0.pom) looks right to me. How are you attempting to resolve the transitive dependencies?
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### Author:  [@Sharat\_Jagannath](https://discuss.elastic.co/u/Sharat_Jagannath)
#### Post date: [November 7, 2016, 10:48pm UTC](https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231/4 "2016-11-07T22:48:21Z")
resolved it. There was some issue with my eclipse.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 10:06pm UTC](https://discuss.elastic.co/t/noclassdeffounderror-httpasyncresponseconsumer/64231/5 "2017-07-05T22:06:10Z")