[BUG] Data Stream tries to connect to opensearch during dry-run

[Jakob3xD]

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Steps to replicate

Create a fluentd config with following content:

<match **>
  @type opensearch_data_stream
  hosts "#{ENV['FLUENT_OS_HOSTS']}"
  port 443
  scheme https
  user "#{ENV['FLUENT_OS_USER']}"
  password "#{ENV['FLUENT_OS_PASS']}"
  reconnect_on_error true
  request_timeout 25s
  ssl_version TLSv1_2
  ssl_verify true
  log_os_400_reason true
  suppress_type_name true
  data_stream_name test
  data_stream_template_name test
  include_tag_key true
</match>

Execute fluentd with the dry-run flag:

fluentd --config test.conf --dry-run

You will get the following error:

2023-06-23 07:01:47 +0000 [error]: config error file="test.conf" error_class=Fluent::ConfigError error="Failed to create data stream: <test> Cannot get new connection from pool."

Expected Behavior or What you need to ask

With the normal opensearch type, dry-run does not try to connect to any opensearch. I would expect the same behavior with the opensearch_data_stream type.

Using Fluentd and OpenSearch plugin versions

• Ubuntu 22.04
• Bare Metal with a systemd service
• fluentd 1.16.1
• gem 'fluent-plugin-opensearch' version '1.1.0'