SearchPhaseExecutionException with Basic Embedded Elasticsearch - elasticsearch

Question

I am trying out Elasticsearch with a basic Scala program, using the Java API:
object TestES {
var node:Node = NodeBuilder.nodeBuilder.node
var client:Client = node.client
def insertDoc(id:String, doc:String) = {
client.prepareIndex("myindex", "test", id).
setSource(doc).execute.actionGet
}
def countHits(qry:String) = {
client.prepareSearch("myindex").setTypes("test").
setQuery(queryString(qry)).execute.actionGet.
getHits.getTotalHits
}
def waitForGreen = client.admin.cluster.prepareHealth().
setWaitForGreenStatus.execute.actionGet
def main(args: Array[String]): Unit = {
insertDoc("1", """{"foo":"bar"}""")
//waitForGreen
println(countHits("bar"))
node.close
}
}
This works, and the insert + query run in under one second. If I comment out the insert, I get the following exception:
Exception in thread "main" org.elasticsearch.action.search.SearchPhaseExecutionException:
Failed to execute phase [query], total failure;
shardFailures {[_na_][myindex][0]: No active shards}
If I enable the waitForGreen line, it works again, but takes over half a minute to run both lines.
This seems quite odd. Is inserting a document a must before running a query, or is there a better way?

Answer 1

Inserting a document is not needed to run a query, but having the index created is required.
When you insert a document and the index doesn't exist, it will be automatically created.
If you want to avoid document creation, you can create only the index using the API :
client.admin.indices.prepareCreate("myindex").execute.actionGet