IndexMissingException with scala and elastic4s

Question

Hello stackoverflowers!

I'm trying to use the library elastic4s with scala, but when I run the following code (in order to fetch the list of ads within the index ads):

trait elastic4s {
  def get: Future[SearchResponse] = {
    val client = ElasticClient.local
    client execute { search in "ads"->"ad" }
  }
}

I got this exception :

An error has occured: org.elasticsearch.indices.IndexMissingException: [ads] missing

Pastebin with full output here.

Here is my configuration:

-- Java
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)

-- ElasticSearch
version 1.0.1

-- Elastic4s
version 2.10-1.0.1 

Elastic Search is up and running, on localhost:9200, and this index ads exists. This CURL request:

curl -XGET 'http://localhost:9200/ads/ad/_search'

returns

{
    "took": 6,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
    },
    "hits": {
    "total": 1,
    "max_score": 1,
    "hits": [
        {
            "_index": "ads",
            "_type": "ad",
            "_id": "UrKm89AXTzOxB9kFdpue4Q",
            "_score": 1,
            "_source": {
                "json": "json"
            }
        }
    ]
    }
}

I can't understand... If anyone could give me a track :)

Answer 1

A local node won't communicate with other Elasticsearch instances running outside that process. A local node is local to the JVM.

The code comments say:

"Is the node a local node. A local node is a node that uses a local (JVM level) discovery transport. Other (local) nodes started within the same JVM (actually, class-loader) will be discovered and communicated with. Nodes outside of the JVM will not be discovered."

You need to use a remote client to connect to external instances, even if they're running locally. I guess that seems counter-intuitive but remote really means IPC or Socket based.