Incompatible Low Version

[laijianbin]

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

Is there any soluation to resolve this problem?

[spinscale (Alexander Reelsen)]

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

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