Fluetnd unexpected error error_class=Elastic::Transport::Transport::Error error="connect_write timeout reached"

elasticsearch가 반응하기도 전에 timeout나는 줄 알았는데, port 정보가 잘못되어서 발생한 문제

# 오류 발생
<match test>
  @type elasticsearch
  # Specify your Elasticsearch host and port.
  host {도메인}
  port {포트}
  scheme {http || https}
  api_key {api key}
</match>

# 수정후
<match test>
  @type elasticsearch
  # Specify your Elasticsearch host and port.
  host {도메인}
  port {포트}
  scheme {http || https}
  api_key {api key}

  # Increase timeouts:
  request_timeout 120 // default is 5s
  connect_timeout 30
</match>