Transport Client - NoNodeAvailableException[None of the configured nodes are available]

Elastic Stack Elasticsearch
2

Dear All

I solved the issue.
I used the docker image to run the elastic search.

The command on this page: https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html

docker run -p 9200:9200 -e "http.host=0.0.0.0" -e "transport.host=127.0.0.1" docker.elastic.co/elasticsearch/elasticsearch:5.4.3

-e "transport.host=127.0.0.1" did not work.

I have to change the elasticsearch.yml, uncomment this line:

transport.host: 0.0.0.0

So that the transport client can correctly connect to port 9300.