# Incompatible Low Version

**URL:** <https://discuss.elastic.co/t/incompatible-low-version/193233>\
**Category:** Elasticsearch\
**Created:** [August 1, 2019, 1:12am UTC](https://discuss.elastic.co/t/incompatible-low-version/193233 "2019-08-01T01:12:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![laijianbin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/laijianbin/32/50512_2.png) [@laijianbin](https://discuss.elastic.co/u/laijianbin)\
**Post date:** [August 1, 2019, 1:12am UTC](https://discuss.elastic.co/t/incompatible-low-version/193233/1 "2019-08-01T01:12:30Z")

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when java client jar use Elasticsearch 6.8.0,Elastic Server use 6.6.1

[![image](https://us1.discourse-cdn.com/elastic/original/3X/5/4/54c862e5035d3319a45e435155d0fcbefc188fce.png)](https://user-images.githubusercontent.com/26161527/62122531-7a992080-b2f8-11e9-8eb5-863f388db1f1.png)

Is there any soluation to resolve this problem?

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**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [August 1, 2019, 12:26pm UTC](https://discuss.elastic.co/t/incompatible-low-version/193233/2 "2019-08-01T12:26:54Z")

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Please stop posting images here. Post the error message as properly formatted markdown, to make it easier to read.

To cite [Transport Client | Java API [7.2] | Elastic](https://www.elastic.co/guide/en/elasticsearch/client/java-api/7.2/transport-client.html)

> Note that you have to set the cluster name if you use one different than "elasticsearch":

Have you taken this into account?

Also, if you have the time, please try the RestClient, as the transport client will be deprecated in 7.0.

--Alex

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 29, 2019, 12:27pm UTC](https://discuss.elastic.co/t/incompatible-low-version/193233/3 "2019-08-29T12:27:01Z")

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