unable to install stream2es

Question

while install stream2es utility in my centos7.3/ubuntu 14.04 getting error:

root@elasticsearchnode-01:~# ./stream2es
2019-04-02T18:02:52.258+0000 ERROR Network error: stream2es.http.Target@5442a311 connection refused
2019-04-02T18:02:52.335+0000 INFO  00:00.122 0.0d/s 0.0K/s (0.0mb) indexed 0 streamed 0 errors 0
root@elasticsearchnode-01:~#

root@elasticsearchnode-01:~# java -version
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)

https://github.com/elastic/stream2es