Context:
When creating the schema we disable automatic index creation for Elasticsearch indices. However, the high level client we currently use, sends the following request:

http://localhost:9200/_cluster/settings?master_timeout=30s&timeout=30s
{
	"persistent" : {
		"action": {
			"auto_create_index": false
		}
	}
}

Which is not supported by Amazon AWS. Instead use the low level client and perform the following request:

http://localhost:9200/_cluster/settings?master_timeout=30s&timeout=30s
{
	"persistent" : {
			"action.auto_create_index": false
	}
}