this is the error that logstash gave us
11:10:50.063 [Ruby-0-Thread-5: C:/Users/matte/Desktop/dati/logstash-5.2.2/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-6.2.6-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:222] WARN logstash.outputs.elasticsearch - Attempted to resurrect connection to dead ES instance, but got an error. {:url=>#<URI::HTTP:0x67594345 URL:http://logstash_system:xxxxxx@localhost:9200/_xpack/monitoring/?system_id=logstash&system_api_version=2&interval=1s>, :error_type=>LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError, :error=>"Elasticsearch Unreachable: [http://logstash_system:xxxxxx@localhost:9200/][Manticore::SocketException] Connection refused: connect"}