Error code 401
[2017-06-15T18:34:26,484][WARN ][logstash.outputs.elasticsearch] Attempted to resurrect connection to dead ES instance, but got an error. {:url=>#<URI::HTTP:0x77e87b7c URL:http://elastic:xxxxxx@master:9200/>, :error_type=>LogStash::Outputs::Elasticsearch::HttpClient::Pool::BadResponseCodeError, :error=>"Got response code '401' contacting Elasticsearch at URL 'http://master:9200/'"}