How to check if ElasticSearch is running properly - scala

Question

I am new to ElasticSearch and I am facing issues while connecting to ElasticSearch. Please find below details:
hq plugin and head plugin are showing different results:
Output of HQ Plugin:
Output of Head Plugin:
When I try to connect from my scala code, I get following error:
org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: []
at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:305)
at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:200)
at org.elasticsearch.client.transport.support.InternalTransportClient.execute(InternalTransportClient.java:106)
at org.elasticsearch.client.support.AbstractClient.index(AbstractClient.java:102)
at org.elasticsearch.client.transport.TransportClient.index(TransportClient.java:340)
at com.sksamuel.elastic4s.IndexDsl$IndexDefinitionExecutable$$anonfun$apply$1.apply(IndexDsl.scala:23)
at com.sksamuel.elastic4s.IndexDsl$IndexDefinitionExecutable$$anonfun$apply$1.apply(IndexDsl.scala:23)
at com.sksamuel.elastic4s.Executable$class.injectFuture(Executable.scala:21)
at com.sksamuel.elastic4s.IndexDsl$IndexDefinitionExecutable$.injectFuture(IndexDsl.scala:20)
at com.sksamuel.elastic4s.IndexDsl$IndexDefinitionExecutable$.apply(IndexDsl.scala:23)
at com.sksamuel.elastic4s.IndexDsl$IndexDefinitionExecutable$.apply(IndexDsl.scala:20)
at com.sksamuel.elastic4s.ElasticClient.execute(ElasticClient.scala:28)
Here is my Code which I use for connection:
val settings = ImmutableSettings.settingsBuilder()
.put("cluster.name", "elasticsearch")
.build()
val client = ElasticClient.remote(settings, ElasticsearchClientUri("elasticsearch://10.50.xxx.xxx:9300"))
I also checked my connection and I am able to successfully telnet 10.50.xxx.xxx on both 9200 and 9300 ports
I read somewhere that the problem might be with http.cors, So I added following lines to /etc/elasticsearch/elasticsearch.yml file on the server:
http.cors.allow-origin: "/.*/"
http.cors.enabled: true
Please suggest what am I doing wrong ?
-- Update --
Thanks # Evaldas Buinauskas, It was version problem, I had installed elastic version 2.0 and was using libraries and plugins of version 1.7. I downgraded my elastic to version 1.7 and everything worked!

Answer 1

The issue comes from different Elasticsearch, head plugin and Scala client versions.
In pre 2.0 Elasticsearch still supported deprecated _status endpoint (deprecated in 1.2.0)
Version 2.0 completely dropped it and replaced it with _recovery.
Both head and Scala weren't upgraded and tried to call dropped api.