Ηi, this is in the kibana.log , not in the elasticsearch.log. It means that Kibana can't talk to Elasticsearch but without any more context it's really hard to know why.
We have all the best intentions to help you with your configuration and get your nodes up and running, but it would be much easier if you provided us with concrete steps on what you are doing and what is your config.
- Did you go through the doumentation as suggested ?
- Did you fix your configuration ? How does it look like now ?
- What are the errors in the logs ( Please share more lines )