# Elastic search Disscursion

**URL:** <https://discuss.elastic.co/t/elastic-search-disscursion/24871>\
**Category:** Elasticsearch\
**Created:** [July 3, 2015, 1:47pm UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871 "2015-07-03T13:47:48Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![kkkoyale](https://avatars.discourse-cdn.com/v4/letter/k/65b543/32.png) [@kkkoyale](https://discuss.elastic.co/u/kkkoyale)\
**Post date:** [July 3, 2015, 1:47pm UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/1 "2015-07-03T13:47:48Z")

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I am a new learning elastic search API,can you help me guys how i star the reading

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [July 3, 2015, 1:52pm UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/2 "2015-07-03T13:52:41Z")

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Do you mean "_start_ reading"? What kind of reading are you talking about? Do you want to make queries and read the query results?

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [July 3, 2015, 2:01pm UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/3 "2015-07-03T14:01:12Z")

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I would start here: [https://www.elastic.co/guide/en/elasticsearch/guide/current/getting-started.html](https://www.elastic.co/guide/en/elasticsearch/guide/current/getting-started.html)

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<div class="post-metadata">

**Author:** ![kkkoyale](https://avatars.discourse-cdn.com/v4/letter/k/65b543/32.png) [@kkkoyale](https://discuss.elastic.co/u/kkkoyale)\
**Post date:** [July 7, 2015, 4:30am UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/4 "2015-07-07T04:30:48Z")

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in my project used elastic search Java API,In that one task Mapping algorithm how i stat the working on it.

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<div class="post-metadata">

**Author:** ![kkkoyale](https://avatars.discourse-cdn.com/v4/letter/k/65b543/32.png) [@kkkoyale](https://discuss.elastic.co/u/kkkoyale)\
**Post date:** [July 7, 2015, 4:39am UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/5 "2015-07-07T04:39:14Z")

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I am create a simple example to create a index in elastic search using java API,I got error.

this is my code

```java
public class CreateClient {

	//@Autowired 
	TransportClient esClient=null;
	String indexName=null;
	String documentType=null;
	String documentId=null;
	 {
		    Settings settings=ImmutableSettings.settingsBuilder().put("cluster.name","sumit").build();
		    esClient = new TransportClient(settings);
		    esClient = esClient.addTransportAddress(new InetSocketTransportAddress("localhost", 9300));
		    
		    
		    }
public void insertDataIntoES() throws IOException{
CreateIndexRequestBuilder createIndexRequestBuilder=esClient.admin().indices().prepareCreate(indexName);
		createIndexRequestBuilder.execute().actionGet();
		IndexRequestBuilder indexRequestBuilder=esClient.prepareIndex(indexName, documentType, documentId);
		XContentBuilder contentBuilder = null;
		contentBuilder.startObject().prettyPrint();
		contentBuilder.field("name", "jai");
		indexRequestBuilder.setSource(contentBuilder);
		
	}
	public static void main(String[] args) throws IOException {
		CreateClient cr=new CreateClient();
		cr.insertDataIntoES();
		
	}

	
}

```

this is error

```auto
Exception in thread "main" org.elasticsearch.action.ActionRequestValidationException: Validation Failed: 1: index is missing;
	at org.elasticsearch.action.ValidateActions.addValidationError(ValidateActions.java:29)
	at org.elasticsearch.action.admin.indices.create.CreateIndexRequest.validate(CreateIndexRequest.java:108)
	at org.elasticsearch.action.TransportActionNodeProxy.execute(TransportActionNodeProxy.java:52)
	at org.elasticsearch.client.transport.support.InternalTransportIndicesAdminClient$1.doWithNode(InternalTransportIndicesAdminClient.java:89)
	at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:202)
	at org.elasticsearch.client.transport.support.InternalTransportIndicesAdminClient.execute(InternalTransportIndicesAdminClient.java:86)
	at org.elasticsearch.client.support.AbstractIndicesAdminClient.create(AbstractIndicesAdminClient.java:359)
	at org.elasticsearch.action.admin.indices.create.CreateIndexRequestBuilder.doExecute(CreateIndexRequestBuilder.java:250)
	at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:91)
	at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:65)
	at CreateClient.insertDataIntoES(CreateClient.java:66)
	at CreateClient.main(CreateClient.java:76)

```

Can You guys please help me

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [July 7, 2015, 8:26am UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/6 "2015-07-07T08:26:59Z")

</div>

Your indexName is `null`. That can not work.

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<div class="post-metadata">

**Author:** ![kkkoyale](https://avatars.discourse-cdn.com/v4/letter/k/65b543/32.png) [@kkkoyale](https://discuss.elastic.co/u/kkkoyale)\
**Post date:** [July 7, 2015, 10:49am UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/7 "2015-07-07T10:49:09Z")

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Thanks for suggestion......

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<div class="post-metadata">

**Author:** ![kkkoyale](https://avatars.discourse-cdn.com/v4/letter/k/65b543/32.png) [@kkkoyale](https://discuss.elastic.co/u/kkkoyale)\
**Post date:** [July 7, 2015, 10:52am UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/8 "2015-07-07T10:52:16Z")

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I have use elastic search java API to some search operation

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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:** [July 6, 2017, 12:03am UTC](https://discuss.elastic.co/t/elastic-search-disscursion/24871/9 "2017-07-06T00:03:14Z")

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