# Exception during create index operation using java high level rest client
**URL:** https://discuss.elastic.co/t/exception-during-create-index-operation-using-java-high-level-rest-client/123108
**Category:** Elasticsearch
**Created:** [March 8, 2018, 3:27pm UTC](https://discuss.elastic.co/t/exception-during-create-index-operation-using-java-high-level-rest-client/123108 "2018-03-08T15:27:08Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@AshutoshB](https://discuss.elastic.co/u/AshutoshB)
#### Post date: [March 8, 2018, 3:27pm UTC](https://discuss.elastic.co/t/exception-during-create-index-operation-using-java-high-level-rest-client/123108/1 "2018-03-08T15:27:08Z")
Hi,
I am using java high level rest client v6.2.2 to connect es cluster v5.3.1. The create index api creates the index successfully but throws the exception:
```
Exception in thread "main" java.io.IOException: Unable to parse response body for Response{requestLine=PUT /?master_timeout=30s&timeout=30s HTTP/1.1, host=cluster host, response=HTTP/1.1 200 OK}
at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:507)
at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:474)
at org.elasticsearch.client.IndicesClient.create(IndicesClient.java:77)
at com.sensano.App.createIndex(App.java:66)
at com.sensano.App.main(App.java:52)
Caused by: java.lang.IllegalArgumentException: Required [index]
at org.elasticsearch.common.xcontent.ConstructingObjectParser$Target.finish(ConstructingObjectParser.java:449)
at org.elasticsearch.common.xcontent.ConstructingObjectParser$Target.access$000(ConstructingObjectParser.java:350)
at org.elasticsearch.common.xcontent.ConstructingObjectParser.parse(ConstructingObjectParser.java:170)
at org.elasticsearch.common.xcontent.ConstructingObjectParser.apply(ConstructingObjectParser.java:162)
at org.elasticsearch.action.admin.indices.create.CreateIndexResponse.fromXContent(CreateIndexResponse.java:128)
at org.elasticsearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:618)
at org.elasticsearch.client.RestHighLevelClient.lambda$performRequestAndParseEntity$2(RestHighLevelClient.java:474)
at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:505)
... 4 more
```
I have the following code:
```
CreateIndexRequest request = new CreateIndexRequest(index);
request.source(SCHEMA_JSON, XContentType.JSON);
CreateIndexResponse createIndexResponse = esRestHighLevelClient.indices().create(request);
```
SCHEMA\_JSON : contains mapping, index settings etc.
Am I doing something wrong?
Thanks in advance for your help.
Best,
Ashutosh
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 8, 2018, 3:49pm UTC](https://discuss.elastic.co/t/exception-during-create-index-operation-using-java-high-level-rest-client/123108/2 "2018-03-08T15:49:28Z")
> I am using java high level rest client v6.2.2 to connect es cluster v5.3.1.
That's the problem.
Sadly the 6.x client is not fully compatible with 5.x.
Read here: [Compatibility | Java REST Client [7.17] | Elastic](https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-high-compatibility.html)
---
### Author:  [@AshutoshB](https://discuss.elastic.co/u/AshutoshB)
#### Post date: [March 10, 2018, 8:32pm UTC](https://discuss.elastic.co/t/exception-during-create-index-operation-using-java-high-level-rest-client/123108/3 "2018-03-10T20:32:50Z")
Tanks David for your reply. It seems I miss understood the compatibility staff between low-level and high-level rest client.
Best,
Ashutosh
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 7, 2018, 8:33pm UTC](https://discuss.elastic.co/t/exception-during-create-index-operation-using-java-high-level-rest-client/123108/4 "2018-04-07T20:33:30Z")
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