elasticsearch and tunnel : i can connect to elesticsearch using browser(google_chrome) but not with JAVA api

Question

my cluster it's not in the same network, and there is a tunnel between my pc and the server.

i have got this error :

org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available

Answer 1

If you are using elasticsearch default multicast mechanism to discover nodes in the cluster you must have all cluster nodes located on the same subnet (this is true till version 2.0).
In order to have your node discovering the other nodes in the cluster you may configure [elasticsearch home]/config/elasticsearch.yaml field name: discovery.zen.ping.unicast.hosts as described [here] (https://www.elastic.co/guide/en/elasticsearch/reference/2.x/modules-network.html):

discovery.zen.ping.unicast.hosts

In order to join a cluster, a node needs to know the hostname or IP address of at least some of the other nodes in the cluster. This >settting provides the initial list of other nodes that this node will try to contact. Accepts IP addresses or hostnames.

Defaults to ["127.0.0.1", "[::1]"].

Hope it helps.