The client is unable to verify that the server is Elasticsearch. Some functionality may not be compatible if the server is running an unsupported product.
2022-04-12 23:33:16 +0000 [error]: #0 config error file="/fluentd/etc/fluent.conf" error_class=Fluent::ConfigError error="Using Elasticsearch client 8.1.2 is not compatible for your Elasticsearch server. Please check your using elasticsearch gem version and Elasticsearch server."
2022-04-12 23:33:16 +0000 [error]: Worker 0 finished unexpectedly with status 2```
Which is coming from here:
https://github.com/uken/fluent-plugin-elasticsearch/blob/39267df24c18fab64543a457f486725d0c9e82b0/lib/fluent/plugin/out_elasticsearch.rb#L498
I am trying to figure out what does "Please check your using elasticsearch gem version and Elasticsearch server." mean.
I am getting this error message: